04:01 <Curie> arXiv.org | Quark and hybrid stars with renormalization group improvement of NNLO perturbative QCD 4h ago · 3 min read Recently, the NNLO perturbative QCD pressure of cold and dense symmetric matter, with arbitrary quark masses, has been resummed within the renormalization-group-optimized perturbation theory (RGOPT) framework. By being imbued with renormalization group properties, the resulting pressure is less sensitive to renormalization scale ($Λ\equiv X μ_B/3$) variat... Read full story

04:01 <Curie> arXiv.org | Massive scalar fields in eccentric regime: Detectability and constraints from LISA observations of extreme mass-ratio inspirals 4h ago · 3 min read Extreme mass-ratio inspirals (EMRIs) are among the most promising sources for future space-based gravitational wave (GW) observatories and provide sensitive probes of additional fundamental fields in the strong-gravity regime. In the present work, we investigate eccentric equatorial EMRIs around Kerr black holes in the presence of a massive scalar field. ... Read full story

04:01 <Curie> arXiv.org | A simple solution to the monopole problem: SU(5) GUT with symmetry breaking into special subgroup Yu Hamada, Naoki Yamatsu · 4h ago · 3 min read Grand unified theories (GUTs) predict the overproduction of magnetic monopoles, leading to the so-called monopole problem, which is often addressed by cosmological inflation that dilutes their abundance. However, if inflation occurs before the GUT symmetry breaking, monopoles are produced afterwards and the problem persists. This motivates the exploration... Read full story

04:01 <Curie> arXiv.org | The decay rate of metastable cosmic strings beyond the thin-string approximation Valerie Domcke, Yu Hamada · 4h ago · 3 min read In the context of grand unified theories, any cosmic strings present in the post-inflationary universe are likely to be metastable, with a decay rate set by the spontaneous creation of monopole pairs on the string. Determining this decay rate is crucial in understanding the phenomenology of the cosmic string network, including a potentially observable gra... Read full story

04:01 <Curie> arXiv.org | Cosmological perturbations of TDiff fields Antonio L. Maroto, Prado Mart\'in-Moruno, Diego Tessainer · 4h ago · 2 min read We study scalar field theories that break diffeomorphism invariance down to the subgroup of transverse diffeomorphisms through the matter sector in cosmological backgrounds. We focus on single- and multi-field models and develop the corresponding cosmological perturbation theory. We analyze the different contributions to the pressure perturbation, discuss... Read full story

04:01 <Curie> arXiv.org | Gauge Theoretic Signal Processing I: The Commutative Formalism for Single-Detector Adaptive Whitening James Kennington, Joshua Black · 4h ago · 3 min read We present a geometric framework for adaptive whitening in gravitational-wave detectors, reformulating the problem from a sequence of spectral factorizations to parallel transport on a principal bundle. We identify the whitening filter as a section over the manifold of power spectra and derive the minimum-phase connection as the unique geometric structure... Read full story

04:01 <Curie> arXiv.org | Looking for non-gaussianity in Pulsar Timing Arrays through the four point correlator Adrien Kuntz, Clemente Smarra, Massimo Vaglio · 4h ago · 3 min read Pulsar Timing Arrays have recently reported strong evidence for a stochastic gravitational wave background. In standard analyses, it is modeled through pulsar-dependent Fourier coefficients assumed to follow gaussian statistics, so that the signal is fully characterized by its two-point function. However, if the background arises from a finite population ... Read full story

04:01 <Curie> arXiv.org | Exploring Leptogenesis, WIMP Dark Matter, and Gravitational Waves in an extended Scalar Framework Subhaditya Bhattacharya, Niloy Mondal, Arunansu Sil · 4h ago · 3 min read We explore an extension of the Type-I seesaw framework in which a scalar mediator $Φ$ connects the Standard Model (SM) to a dark sector consisting of right-handed neutrinos or RHNs ($N_i$) and a complex scalar $S$. The interactions are governed by a phenomenologically viable $\mathcal{Z}_4 \times CP$ symmetry, allowing a dimension-5 effective operator inv... Read full story

04:01 <Curie> arXiv.org | BRAHMa: Bar Recognition And Hatching using Machine learning -- a framework for oriented bounding box detection of galactic bars Rajit Shrivastava, Narendra Nath Patra, Keerthi K · 4h ago · 4 min read Galactic bars are fundamental components in studies of dark matter, galaxy evolution, and secular dynamics. However, current methods for measuring bar properties suffer from significant limitations. Manual and crowdsourced catalogs are not scalable to next-generation surveys, while recent machine learning (ML) approaches based on pixel-wise segmentation a... Read full story

04:01 <Curie> arXiv.org | Unravelling the Nature of AT 2025abao: From Precursor to Final Fate 4h ago · 3 min read Luminous red novae (LRNe) are potential signatures of common envelope evolution (CEE), a critical yet poorly understood phase in compact binary formation. AT 2025abao, an LRN in the Andromeda galaxy, originated from an asymptotic giant branch (AGB) progenitor and exhibited a prolonged pre-outburst transient. Lacking direct constraints on the companion, ho... Read full story

04:08 <Quasar> ScienceDaily | Stanford scientists turn a cancer driver into a kill switch 7h ago · 9 min read A Stanford-designed molecule turns a major lymphoma-promoting protein against cancer cells, activating their own self-destruct machinery instead of simply blocking tumor growth. In mice, the treatment completely eliminated aggressive human lymphoma tumors within 11 days, although much more testing is needed before it could reach patients. Read full story

05:11 <Curie> NASA Science | Fighting Drought in Texas Cotton Country Lauren Dauphin · 1h ago · 8 min read Drought and an ailing aquifer were major topics of conversation when NASA scientists visited with farmers in the Texas High Plains. Read full story

05:11 <Curie> NASA Science | APOD: 2026 October 8 - The Saturn System Smörgåsbord Jerry Bonnell · 1h ago · 1 min read APOD Science APOD APOD: 2026 October 8 – The… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. The Saturn […] Read full story

09:58 <Curie> Live Science | OpenAI claims we've entered the AGI era — has GPT-6 Astra really demonstrated general intelligence? Adam Shepherd · 58m ago · 9 min read OpenAI says its newly launched GPT-6 Astra model brings humanity to the threshold of AGI, but external evaluators argue that inflated lab metrics and opaque testing obscure its true reliability. Read full story

11:01 <Curie> Live Science | Why are dengue cases surging in Florida this year? An 'unlucky' combination of factors, experts say Olivia Ferrari · 1h ago · 8 min read Dengue fever infections are booming in Florida this year, with more local cases than usual and the state's first dengue-related death in nearly a century. Why? Read full story

15:06 <Quasar> ScienceDaily | Just 7 days of strength training started shrinking fat cells in mice 10h ago · 9 min read Just seven strength-training sessions helped obese mice shrink visceral fat cells and reactivate molecular pathways involved in burning stored fat, despite no change in overall body weight. The findings suggest some benefits of resistance exercise may begin long before weight loss becomes visible, though the results still need to be confirmed in humans. Read full story

15:06 <Quasar> ScienceDaily | Einstein Probe reveals a hidden phase of neutron star collisions 9h ago · 8 min read Einstein Probe revealed nearly 10 minutes of soft X-ray activity following a short gamma-ray burst, exposing a phase of neutron star mergers that previous missions may have missed. The prolonged emission could have been powered by a newly formed magnetar and may provide a valuable new counterpart to gravitational-wave signals. Read full story

15:06 <Quasar> ScienceDaily | FDA-approved epilepsy drug may help reverse osteoarthritis damage 5h ago · 8 min read Researchers at Yale have identified a promising new approach to osteoarthritis that could do more than simply ease pain. The epilepsy drug lacosamide appears to block a protein involved in both pain signaling and cartilage destruction, helping damaged joints shift back toward repair in preclinical studies. Read full story

15:06 <Quasar> ScienceDaily | Scientists found Homo erectus 200,000 years earlier than expected 6h ago · 6 min read New fossils from South Africa are reshaping the story of early human evolution. Researchers have described 18 hominin fossils from Drimolen Cave, including an adult Homo erectus skull fragment dated to about 2 million years ago, supporting evidence that the species appeared in southern Africa roughly 200,000 years earlier than long thought. The finds also... Read full story

15:06 <Quasar> ScienceDaily | This “golden tree” coral was too strange for any known family 5h ago · 6 min read A brilliant yellow coral discovered off Costa Rica proved so unusual that scientists had to create an entirely new family to classify it. The meter-tall colonies rise from seafloors covered in brittle stars, inspiring the Tolkien-inspired name Laurinque elenya, or “golden tree of the stars.” Advanced genetic analysis revealed that the coral belongs to a p... Read full story

15:06 <Quasar> ScienceDaily | Scientists accidentally discover a genetic code that breaks the rules of life 5h ago · 13 min read Scientists accidentally discovered a microscopic organism with a genetic code that breaks a rule researchers thought was nearly universal. While testing a new DNA sequencing technique, they examined a previously unknown protist collected from a freshwater pond at Oxford University. To their surprise, the organism uses two genetic signals that normally mar... Read full story

15:06 <Quasar> ScienceDaily | NASA is searching for hidden caves to build its first Moon base 6h ago · 9 min read NASA is preparing for humanity’s first Moon base with three investigations that will hunt for underground shelters, uncover hidden ice, and track dangerous conditions on the lunar surface. The findings could reveal how astronauts can survive and thrive on the Moon while laying the groundwork for future journeys to Mars. Read full story

16:06 <Curie> Live Science | The central Pacific Ocean just broke a temperature record. Experts say it might signal a new kind of El Niño. Sascha Pare · 22m ago · 6 min read The sea surface temperature in a key El Niño region has exceeded 86 degrees F for the first time on record, hinting that the strength and location of some El Niño events are transforming. Read full story

16:14 <Curie> NASA Science | NASA Advances LISA Mission Contributions With New Test Telescope Francis Reddy · 42m ago · 3 min read NASA has taken the next step in the process of developing a new all-glass telescope for the LISA (Laser Interferometer Space Antenna) mission, a space Read full story

16:14 <Curie> NASA | NASA, Energy Department Advance New Era of Nuclear-Powered Exploration Gerelle Q. Dodson · 27m ago · 3 min read As the Golden Age of deep-space exploration begins, NASA and the U.S. Department of Energy are advancing the development of safe, reliable, next-generation Read full story

17:04 <Curie> Live Science | Would you trust AI to calculate your true 'biological age'? Nicoletta Lanese · 55m ago · 2 min read Scientists have developed various AI tools to measure people's biological ages. Would you use one? Read full story

18:07 <Curie> Live Science | The Milky Way grew from thousands of galaxies during 'Cosmic Dawn,' new simulations reveal Sharmila Kuthunur · 26m ago · 5 min read A new supercomputer simulation traces how thousands of small galaxies eventually became the Milky Way. Read full story

18:07 <Curie> Live Science | James Webb telescope tracks the most distant 'fast radio burst' ever, doubling the previous record Elizabeth Howell · 7m ago · 4 min read The James Webb Space Telescope has detected the farthest "fast radio burst" ever seen, providing more clues about these mysterious explosions. Read full story

18:10 <Curie> NASA | NASA’s SpaceX Crew‑12 Splashes Down, Sets Briefing to Discuss Mission Lauren E. Low · 1h ago · 3 min read After more than seven months aboard the International Space Station, NASA’s SpaceX Crew-12 mission safely splashed down Thursday in the Pacific Ocean off the Read full story

19:12 <Curie> NASA Science | Webb Measures Distance to Farthest Fast Radio Burst, Suggesting Origin Marty McCoy · 1h ago · 7 min read First discovered in 2007, fast radio bursts are enigmatic, millisecond-long flashes of radio emission from the distant universe. Their origin remains Read full story

19:12 <Curie> NASA | NASA’s SPHEREx Telescope Sees Menagerie of Brown Dwarfs Jet Propulsion Laboratory · 49m ago · 5 min read NASA’s SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer) space telescope is shedding light on brown Read full story

19:30 <Curie> arXiv.org | JWST Observations of Starbursts: The motion of dust - PAH kinematics of M82 and NGC 253 with JWST/MIRI spectroscopy 19h ago · 4 min read We present an analysis of dust kinematics in the local starburst galaxies M82 (NGC 3034) and NGC 253 using Polycyclic Aromatic Hydrocarbon (PAH) features observed with JWST/MIRI spectroscopy. We are able to produce high-quality velocity maps of the 5.2 $μ$m, 6.2 $μ$m, and 11.3 $μ$m PAH features, as well as numerous lines of molecular gas via H$_2$ rotatio... Read full story

19:30 <Curie> arXiv.org | ALMA Chemical Evolution (ACE) survey: The gas fundamental metallicity relation at cosmic noon 19h ago · 3 min read Chemical enrichment shapes how galaxies form and evolve. The gas-phase metallicity is directly linked to the stellar mass, star formation rate, and cold gas of the interstellar medium. Thus, the cold gas fundamental metallicity relation (GFMR) is a powerful tool for probing galaxy evolution, bridging large-scale gas flows modulating the cold gas reservoir... Read full story

19:30 <Curie> arXiv.org | An Updated Model for Epsilon Eridani b and Prospects for Imaging with the Roman Coronagraph 19h ago · 4 min read Epsilon Eridani b, the nearest known Jupiter analog, has its orbit and mass constrained from radial velocity (RV) and absolute astrometry, and its atmosphere from JWST/NIRCam imaging upper limits in Sanghi et al. 2026. Here we follow up that work with a self-consistent model of Epsilon Eridani b that treats all available data within a single Bayesian fram... Read full story

19:30 <Curie> arXiv.org | POSEIDON III: The Aligned Orbit of the Hot Neptune Around the Hot Star WASP-195 19h ago · 4 min read Stellar obliquities provide important clues as to the formation and migration histories of planetary systems, but measurements remain scarce for Neptune-mass planets, especially those orbiting hot stars (above the Kraft break). Here we present observations of the Rossiter-McLaughlin effect in the hot-star/hot-Neptune system WASP-195 ($T_{\rm eff}=6470\pm1... Read full story

19:30 <Curie> arXiv.org | Scatter, bias, and chaos of satellite orbits in triaxial dark matter haloes Barry T. Chiang, Frank C. van den Bosch, Michael A. Keim · 19h ago · 3 min read The pericentric distances of satellite galaxies govern their tidal stripping, quenching, and survival, yet their orbits are almost universally computed in spherical host haloes, whereas dark matter haloes are generically triaxial. We quantify, orbit by orbit, the error this simplification incurs. We integrate $10^6$ satellites, drawn from a cosmological i... Read full story

19:31 <Curie> arXiv.org | Tidal disruption of stellar binaries as a pathway to exotic transients 19h ago · 3 min read Tidal disruption event (TDE) progenitors are commonly modelled as single stars on parabolic orbits around a supermassive black hole (SMBH), yet observations reveal a richer diversity of dynamical pathways. We show that tidal separation of stellar binaries by a $10^6\,M_\odot$ SMBH provides a natural mechanism for producing eccentric TDEs. Using restricted... Read full story

19:31 <Curie> arXiv.org | Reconstructing orbits of galaxies in extreme regions (roger v2.0): an extension to intermediate mass systems 19h ago · 3 min read In this paper, we present an updated version of the roger code, called roger v2.0, developed to perform the orbital classification of galaxies residing in and around galaxy groups and clusters. In addition to the projected phase-space coordinates, the new version incorporates the host halo mass as an additional input parameter. Although the inclusion of t... Read full story

19:31 <Curie> arXiv.org | Eclipses by Artificial Satellites to Measure the Angular Sizes of Stars 19h ago · 3 min read Direct measurements of the angular sizes of stars (other than our Sun) are inherently limited by telescopes' optical diffraction limit. The spatial diffraction limit can be overcome by using time-domain information when stars are `eclipsed' by anything moving in the foreground: artificial satellites or the Moon (known as `lunar occultation imaging'). Here... Read full story

19:31 <Curie> arXiv.org | Growth, geometry, and early-universe split of the matter density parameter $Ω_{\rm m}$ Felicitas Keil, Isaac Tutusaus, Alain Blanchard · 19h ago · 3 min read While the $Λ$ cold dark matter ($Λ$CDM) model can successfully reproduce the measurements of many cosmological probes, some discrepancies have recently emerged. It is therefore necessary to test the standard cosmological model for consistency. An important stress test is to separate the effect of different cosmological regimes on the parameter inference. ... Read full story

19:31 <Curie> arXiv.org | Shock breakout from mildly relativistic ejecta in a dense wind: the case of EP260321a/SN 2026gzf Akihiro Suzuki, Keiichi Maeda, Toshikazu Shigeyama · 19h ago · 3 min read We present shock breakout (SBO) modeling of the recently discovered X-ray transient EP260321a detected by the \textit{Einstein Probe} mission. Our semi-analytic model, based on our previous work, follows the interaction between a supernova ejecta with a mildly relativistic outer envelope and a dense, wind-like circumstellar medium (CSM) by using a thin-sh... Read full story

19:34 <Curie> arXiv.org | Comparing the Near-infrared Spectral Energy Distributions from Different Stellar Population Synthesis Models with SPHEREx Observations 19h ago · 4 min read While stellar population synthesis (SPS) models have been widely used for spectral analysis in optical wavelengths, their characteristics remain uncertain in the near-infrared (NIR) due to a relative lack of observed NIR spectra. The spectrophotometric data from SPHEREx are well-suited for investigating the performance of SPS models in the NIR, thanks to ... Read full story

19:34 <Curie> arXiv.org | On the Separation Between the Brightest Cluster Galaxy and the Intracluster Light Emanuele Contini, Sukyoung K. Yi · 19h ago · 3 min read We present a model-based framework to define an aperture separation between the brightest cluster galaxy (BCG) and the intracluster light (ICL). Using the intrinsic BCG and ICL components predicted by the semi-analytic model \texttt{FEGA25}, we determine, for each halo, the aperture radius that minimizes the bias in the recovered ICL mass. The optimal rad... Read full story

20:42 <Curie> NASA | Crew-12 Returns to Earth HQ Web Team · 1h ago · 4 min read The SpaceX Crew Dragon Freedom spacecraft is seen moments before splashing down in the Pacific Ocean off the coast of California in this Oct. 8, 2026, Read full story

20:42 <Curie> NASA | NASA’s SSPICY Mission to Demonstrate In-Space Inspection Technologies Tara Friesen · 1h ago · 2 min read The Small Spacecraft Propulsion and Inspection Capability (SSPICY) mission launched Oct. 1 from Vandenberg Space Force Base in California. The mission is a Read full story

20:42 <Curie> NASA | NASA Announces Bold Science Initiatives for America’s Golden Age Summit Jessica Taveau · 1h ago · 2 min read NASA is launching two new science and technology initiatives to deepen scientific understanding and accelerate the innovation that will shape America’s future Read full story

20:42 <Curie> NASA | NASA Briefing to Highlight Contributions to Martian Moons Mission Jessica Taveau · 19m ago · 2 min read Media are invited to join NASA for a media teleconference at 4 p.m. EDT, Thursday, Oct. 15, to preview the agency’s contributions to JAXA’s (Japan Aerospace Read full story

20:45 <Curie> arXiv.org | Gravitational wave emission from nonspherical collapse in an early matter-dominated era using N-body simulations 20h ago · 3 min read We study the dynamics of the collapse of a nonspherical overdense patch during an early matter-dominated era and the associated production of gravitational waves (GWs) using a semirelativistic N-body framework that we develop. The collapsing patch is initialized through a Zel'dovich deformation of a homogeneous sphere and evolved in an Einstein--de Sitter... Read full story

20:45 <Curie> arXiv.org | Coverage is not enough: Frequentist tests of simulation-based inference for primordial non-Gaussianity Toka Alokda, Cristiano Porciani, Alexander Eggemeier · 20h ago · 3 min read (Abridged) Simulation-based inference (SBI) has emerged as a powerful framework for extracting cosmological information from complex, non-linear data where analytical likelihoods are unavailable. Its reliability is commonly assessed using coverage-based diagnostics under the prior predictive distribution, which probe calibration only in an averaged sense ... Read full story

20:45 <Curie> arXiv.org | Cosmic gas accretion from filaments onto galaxy clusters using the IllustrisTNG simulation Jade Past\'e, C\'eline Gouin, Nabila Aghanim, Jenny G. Sorce · 20h ago · 3 min read Galaxy clusters grow through the matter accretion from the cosmic web, mainly along filaments. We aim to characterize the gas accretion onto clusters, focusing on the role of filaments in driving anisotropic inflows and thermodynamic properties, as it remains a key challenge for cosmology. In this study, we analyzed 415 galaxy clusters from the IllustrisT... Read full story

20:45 <Curie> arXiv.org | Multi-wavelength study of EP250416a / GRB 250416C: An Optically Dark Long GRB with a Late Jet Break 20h ago · 4 min read We present multi-wavelength study of the $γ$/X-ray transient EP250416a (also designated GRB 250416C), triggered by the Einstein Probe (EP) Wide-field X-ray Telescope and also by SVOM and Konus-Wind (KW). Observations spanning the $γ$-ray, X-ray, and optical bands facilitated detailed analysis of the burst's prompt emission, afterglow evolution, and physic... Read full story

20:45 <Curie> arXiv.org | Revisiting Ca II Activity Indices in FGK Stars: Systematic Biases in Infrared Triplet Measurements 20h ago · 3 min read Synthetic-template subtraction is widely used to measure chromospheric activity in large spectroscopic surveys. However, many solar-like FGK stars show systematically negative Ca II infrared triplet (IRT) activity indices. We investigate this effect using solar-like stars from LAMOST DR9, MaStar, and XSL DR3, measuring activity indices (R^+) for both the ... Read full story

20:46 <Curie> arXiv.org | Detecting the neutrino mass via the cross-correlation between matter tracers and the ISWRS effect? 20h ago · 3 min read This work explores the potential to detect the nonlinear Integrated Sachs Wolfe effect, namely the Rees-Sciama effect (ISWRS), by cross-correlating current and future Cosmic Microwave Background (CMB) experiments -- Simons Observatory, CMB-S4, CMB-HD, and PICO -- with ongoing Large Scale Structure (LSS) surveys, such as Euclid and the Vera Rubin Observato... Read full story

20:46 <Curie> arXiv.org | A Unified Charge-Dependent Modulation Model for AMS-02 Proton and Antiproton Fluxes during Solar Minimum 20h ago · 3 min read We develop a unified charge-dependent solar modulation model by solving the three-dimensional Parker transport equation, incorporating a realistic wavy heliospheric current sheet to treat drift effects self-consistently. Using a local interstellar spectrum from GALPROP constrained by Voyager data, we fit the model to time-resolved proton and antiproton fl... Read full story

20:46 <Curie> arXiv.org | Solar Vortices as Conduits for Magnetoacoustic Waves: Multi-Layer Coupling and Their Role in Atmospheric Heating 20h ago · 3 min read Vortices are widespread throughout the solar atmosphere and commonly interpreted as channels for Alfvén wave energy transport. However, this interpretation has mostly been inferred from the apparent alignment of rotating plasma structures with the magnetic field, rather than direct evidence of the nature of the waves involved. We present observational and... Read full story

20:46 <Curie> arXiv.org | Water-rich sub-Neptunes and rocky super Earths around different Stars: Radii shaped by Volatile Partitioning, Formation, and Evolution 20h ago · 4 min read The nature of sub-Neptunes remains unknown due to degeneracies in interior structure solutions. However, a statistical set of small planets with measured masses and radii can be used to test the planet formation theory prediction of large water reservoirs on sub-Neptunes. Here, we investigate whether water is included in photoevaporative mass loss and how... Read full story

20:46 <Curie> arXiv.org | Analytic parity-violating greybody factors of a dynamical Chern-Simons black hole Abhishek Rout (University of South Carolina) · 20h ago · 3 min read We study the low-frequency scattering of gravitational and pseudoscalar waves off a non-rotating black hole in dynamical Chern-Simons (dCS) gravity, where the axial (odd-parity) gravitational sector is irreducibly coupled to the dynamical pseudoscalar while the polar sector remains general relativistic. Working to first order in the dimensionless coupling... Read full story

20:46 <Curie> arXiv.org | Phenomenology of axion-meson mixing and scattering processes No\'e Duarte-Gonz\'alez · 20h ago · 3 min read We study the mixing between a generic axion-like particle (ALP) and the light pseudoscalar mesons within chiral perturbation theory ($χ$PT), and its consequences for low-energy scattering and decay processes. Starting from the most general ALP effective Lagrangian, we derive the ALP-meson kinetic and mass mixing induced at leading order in the ALP decay c... Read full story

20:47 <Curie> arXiv.org | The contribution of Soviet scientists to the emergence of high-energy neutrino astrophysics: from the Cherenkov effect to underwater and in-ice telescopes Bakhromzod Rizoi · 20h ago · 3 min read The 2026 Nobel Prize in Physics was awarded to Francis Halzen @for decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin.@ This article examines the Soviet contribution to the broader historical development of high-energy neutrino astrophysics. Four interconnected strands are distingu... Read full story

20:47 <Curie> arXiv.org | Anisotropic Fluid Model for Massive Boson Stars: Spherically Symmetric Configurations Ethan McKeever, Victor Guedes, Shu Yan Lau, Kent Yagi · 20h ago · 3 min read Boson stars are among the best-studied exotic compact objects and constitute one of the few black-hole mimickers for which both the formation mechanism and dynamical behavior can be investigated from first principles. Constructing boson star solutions is generally more challenging than constructing neutron star solutions, often requiring either extremely ... Read full story

20:47 <Curie> arXiv.org | Toward a complete understanding of the properties of GW190521 20h ago · 3 min read Interpreting GW190521 remains challenging due to its exceptionally high total mass and correspondingly small number of observable gravitational-wave cycles, which gives rise to degeneracies between different physical interpretations. Motivated by the outstanding questions surrounding the event, we present a comprehensive reanalysis of GW190521 using wavef... Read full story

20:47 <Curie> arXiv.org | Convergence of Roberts flow dynamos in Eulerian and Lagrangian codes Nikyta Shchutskyi, Axel Brandenburg, Matthieu Schaller · 20h ago · 3 min read Standard benchmark tests for numerical magnetohydrodynamics codes focus on one- and two-dimensional problems that ignore the possibility of dynamos, i.e., an exponential instability converting kinetic energy into magnetic energy. They also tend to ignore magnetic helicity conservation that can have dramatic effects in periodic domains. The existence of ma... Read full story

20:47 <Curie> arXiv.org | An early $Z'$ dominance: dark matter, gravitational waves & collider probes 20h ago · 3 min read In the minimal anomaly-free gauged B$-$L extension of the Standard Model (SM), we consider a scenario in which the energy density of the new Abelian gauge boson dominates the Universe prior to big bang nucleosynthesis (BBN), resulting in an early matter-dominated (EMD) era. Taking one of the three right-handed neutrinos to be a decaying dark matter (DM) c... Read full story

20:47 <Curie> arXiv.org | A Common $\sim$55 GeV Inelastic Dark Matter Origin of the LZ, Fermi-LAT, and AMS-02 Excesses and Paleo-Detector Prospects 20h ago · 3 min read We investigate the 248~keV nuclear recoil excess reported by LUX-ZEPLIN (LZ) in a leptophobic inelastic dark matter framework, in which the mass splitting naturally suppresses low-energy recoils. We find two viable branches, including the endothermic solution with a high dark matter mass $m_χ\gtrsim400$~GeV and the exothermic one with a mass of tens GeV. ... Read full story

20:47 <Curie> arXiv.org | Phase transitions, shadows, and microstructure of Reissner-Nordström-Anti-de-Sitter black holes from a geometrothermodynamic perspective Jose M. Ladino, Carlos E. Romero-Figueroa, Hernando Quevedo · 20h ago · 3 min read We study the thermodynamic properties of the Reissner-Nordström black hole with cosmological constant, expressed in terms of the curvature radius, by using the approach of shadow thermodynamics and the formalism of geometrothermodynamics. We derive explicit expressions for the shadow radius in terms of the horizon, photon sphere, and observer radii. The p... Read full story

20:47 <Curie> arXiv.org | Constraints on Primordial Oscillatory Features from the Power Spectrum and Bispectrum of Redshift-Space Galaxy Clustering in DESI DR1 20h ago · 3 min read We constrain oscillatory features in the primordial power spectrum using the public DESI DR1 galaxy and quasar clustering data. Our analysis is based on a custom pipeline for the redshift-space power spectrum and bispectrum of the six main DESI DR1 tracers, modeled with the Lagrangian effective field theory,which provides a principled resummation of the n... Read full story

20:47 <Curie> arXiv.org | Widespread steep X-ray spectra of luminous $z\simeq5.85-7.5$ quasars and their implications for future X-ray surveys 20h ago · 4 min read Luminous quasars (QSOs) at the Epoch of Reionization (EoR, $z\gtrsim6$) host billion-solar-mass black holes assembled within the first Gyr of cosmic time. Their X-ray emission probes the innermost accreting regions and constrains the physical state of the corona during early supermassive black hole (SMBH) growth. Previous results from the HYPerluminous qu... Read full story

21:21 <Curie> arXiv.org | BOLT: Imaging Lightning and Terrestrial Gamma-ray Flashes at the Pierre Auger Observatory 21h ago · 3 min read Lightning-related phenomena are known to interact with and influence all detector systems of the Pierre Auger Observatory. Notably, the Surface Detector has recorded unique signals associated with Terrestrial Gamma-ray Flashes (TGFs), which are rare phenomena linked to the initial processes of lightning. Studying TGFs in coincidence with their parent ligh... Read full story

21:21 <Curie> arXiv.org | The NANOGrav 15 yr Dataset: Modified Functional Forms for Profile-Evolution Time Delays in Pulsar Timing Models 21h ago · 4 min read Radio pulsars exhibit frequency-dependent variations in the shape of their pulse profiles that introduce systematic delays in the observed pulse times of arrival (TOA) across an observing band. The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) models these delays using a frequency-dependent (FD) log-polynomial function whose coef... Read full story

21:21 <Curie> arXiv.org | Deep Learning for Cherenkov Astronomy: Performance of GammaLearn on LST-1 21h ago · 3 min read The Cherenkov Telescope Array Observatory (CTAO) marks the next generation of Imaging Atmospheric Cherenkov Telescopes (IACTs), offering a sensitivity improvement of up to a factor of 10 over current instruments. Its first prototype, the Large-Sized Telescope (LST-1), is already in operation at the Roque de los Muchachos Observatory in La Palma, Spain. De... Read full story

21:21 <Curie> arXiv.org | A Decade-Scale Ionization Echo of Black-Hole Accretion in Galactic Nuclei 21h ago · 3 min read Circumnuclear structures in active galactic nuclei respond to accretion variability over different spatial and temporal scales, but whether compact narrow-line gas responds on decade timescales has not been systematically established. We use repeat Sloan Digital Sky Survey and Dark Energy Spectroscopic Instrument spectroscopy of 473 variability-selected g... Read full story

21:22 <Curie> arXiv.org | Photometric and Spectroscopic Study of Young Stellar Objects in IC 1848E Region Shubham Yadav, Neelam Panwar, Lalita Sharma, C. Rishi · 21h ago · 3 min read We present a comprehensive analysis combining multi-epoch mid-infrared (MIR) photometric and optical spectroscopic observations of young stellar candidates associated with elongated, elephant trunk-like structures (ETLSs) in the IC 1848E star-forming region. A sample of 15 candidate YSOs, initially identified by Chauhan et al. (2011), was investigated usi... Read full story

21:22 <Curie> arXiv.org | Changing-look Active Galactic Nuclei from the Dark Energy Spectroscopic Instrument. VII. Testing Disk-Corona Diagnostics with eROSITA 21h ago · 3 min read Changing-look active galactic nuclei (CL-AGN) have been proposed to follow an X-ray-binary-like, V-shaped relation between the optical/ultraviolet-to-X-ray spectral slope, $α_{\rm OX}$, and the Eddington ratio, $λ_{\rm Edd}\equiv L_{\rm bol}/L_{\rm Edd}$. We test this interpretation using CL-AGN selected from the Dark Energy Spectroscopic Instrument (DESI... Read full story

21:22 <Curie> arXiv.org | ROSE (Red-giant Oscillations Spectra Estimator): A Modular Machine-Learning Framework for Automated Asteroseismic Characterisation. I. $ν_{\max}$ and $Δν$ from TESS 21h ago · 3 min read Space-based photometry from Kepler and TESS has delivered oscillation spectra for hundreds of thousands of red giants, and PLATO and the Roman Galactic Bulge Time-Domain Survey will add more. We present ROSE, a modular machine-learning framework for automated asteroseismic characterisation of red giants, and apply two of its modules to the frequency of ma... Read full story

21:22 <Curie> arXiv.org | Two Low-Mass-Ratio Microlensing Planets from High-Magnification Events: KMT-2021-BLG-0247 and MOA-2023-BLG-169 21h ago · 4 min read We present an analysis of two planetary microlensing events, KMT-2021-BLG-0247 and MOA-2023-BLG-169, both of which exhibit high magnifications and low planet--host mass ratios, but with markedly different levels of parameter constraint. For KMT-2021-BLG-0247, the finite-source effect and microlens parallax are both clearly detected, leading to unusually t... Read full story

21:22 <Curie> arXiv.org | A relativistic inflow candidate in a quasar at cosmic noon 21h ago · 3 min read Cosmic noon ($z\sim2$) marks the peak epoch of cosmic star formation and black hole accretion activity, where strong accretion and outflows are expected. We report two candidate absorption features in the \textit{XMM-Newton} spectrum of the quasar WISEA~J094835.95+432302.6 at $z=1.893$. Two redshifted features occur at rest-frame energies of $\sim4.65$ an... Read full story

21:22 <Curie> arXiv.org | A Gravitationally Lensed Low-Luminosity AGN From The Cosmic Noon 21h ago · 3 min read Strong gravitational lensing provides a unique tool of studying intrinsically faint high-redshift active galactic nuclei (AGN). In particular, low-luminosity AGN (LLAGN) can probe black-hole growth in low-mass galaxies that current X-ray surveys cannot otherwise access. We investigate the nature and physical properties of a faint X-ray source triply image... Read full story

21:23 <Curie> arXiv.org | IMFIT-MW: Multiwavelength photometric decomposition with IMFIT Ilia V. Chugunov · 21h ago · 3 min read Photometric decomposition is often used to study galaxy structure by modelling surface brightness distribution in its components. However, most of the relevant codes are designed for single-band analysis. I present IMFIT-MW: a lightweight, open source Python tool that extends IMFIT capabilities to simultaneously model multiwavelength images. IMFIT-MW is a... Read full story

21:23 <Curie> arXiv.org | Angular Baryon Acoustic Oscillations with DESI DR1 21h ago · 3 min read We present the angular BAO analysis using DESI DR1 data as a complementary approach to DESI's primary 3D BAO analysis. We perform the analysis using the two-point angular correlation function $w(θ)$ in tomographic redshift shells of $δz = 0.02, 0.05$, spanning the redshift range $0.4 < z < 2.1$ using the DESI tracers: LRG1, LRG2, LRG3+ELG1, ELG2 and QSO. ... Read full story

21:23 <Curie> arXiv.org | Effective Neutrino Mass and Apparent Phantom Crossing 21h ago · 3 min read Recent cosmological constraints on the sum of neutrino masses have reached, and in some analyses fallen below, the minimum value implied by the normal mass ordering, suggesting a possible tension with neutrino-oscillation measurements. We investigate whether this discrepancy can be alleviated in a mass-varying-neutrino (MaVaN) cosmology in which a canonic... Read full story

21:23 <Curie> arXiv.org | A Recurrent Infrared Modulation in the Warm Post-impact Debris Disk NGC 2547 ID8 Xiaodian Chen, Shu Wang, Zhuochao Huang · 21h ago · 3 min read Extreme debris disks are signposts of violent rocky collisions, but it remains unclear whether their mid-infrared variability traces transient dust clouds or longer-lived post-impact reservoirs. We analyze a 19 yr mid-infrared record of the young solar analog NGC 2547 ID8, combining four spectra from 2007-2024 with 3-5 micron monitoring through 2026. The ... Read full story

21:23 <Curie> arXiv.org | MUSE-ALMA Haloes XVI: a census of the condensed baryons in z~0.5 HI absorption-selected galaxies 21h ago · 4 min read We use the MUSE-ALMA Haloes sample to build a census of the condensed baryons (stars and cold gas) to study the multiphase interstellar medium and circumgalactic medium (CGM). The sample includes 79 gas-rich galaxies at 0.2<z<1.2 located near strong HI Ly-alpha absorbers along quasar sightlines within projected separations of ~5-270 kpc and radial velocit... Read full story

21:23 <Curie> arXiv.org | MUSE-ALMA Haloes XV: Cold molecular, ionised, and stellar kinematics of HI-rich galaxies at z $\sim$ 0.5 21h ago · 4 min read Spatially resolved galaxy kinematics are well studied at z $\sim$ 0 and z > 1, revealing that disks are common out to z $\sim3-6$, albeit with higher velocity dispersions. z $\sim$ 0.5 marks a key transition in the drivers of disk turbulence and baryonic-dark matter mass budgets, yet multi-tracer resolved kinematic studies remain rare beyond the local Uni... Read full story

21:23 <Curie> arXiv.org | MUSE-ALMA Haloes XIV: The ALMA Large Programme Data Release 21h ago · 4 min read The interactions between gas and galaxies are of paramount importance to our understanding of structure formation. A fundamental element of such baryon cycle studies is a complete census of the condensed matter (stars and cold gas) in both galaxies and their immediate surroundings, the so-called circumgalactic medium. Of particular importance are the proc... Read full story

21:23 <Curie> arXiv.org | Quasi-periodic eruption spectral-timing: EMRIs crossing warped accretion disks 21h ago · 3 min read Quasi-periodic eruptions (QPEs) are repeating X-ray transients from galactic nuclei potentially caused by a stellar-mass orbiter repeatedly colliding with the accretion disk of a supermassive black hole (SMBH) in an extreme mass-ratio inspiral (EMRI). In this picture, the eruption arrival times encode the orbit and its relativistic precessions, while the ... Read full story

21:23 <Curie> arXiv.org | Wave-Growth-Limited Particle Confinement in a Near-Parallel Interplanetary Shock Observed by Parker Solar Probe 21h ago · 3 min read Collisionless shocks confine the particles they accelerate with the upstream wave field they themselves drive. Streaming particles resonantly amplify Alfvén waves, and the waves then confine the same particles by pitch-angle scattering. The rigidity a shock precursor can hold is therefore capped by how fast those waves grow, and that coupling has not prev... Read full story

21:23 <Curie> arXiv.org | Composition $g$-modes and $f$-modes of neutron stars with gravitationally coupled dark matter: degeneracy with the symmetry energy Probit J Kalita, Bharat Kumar, H C Das · 21h ago · 3 min read Composition gravity ($g$) modes have been proposed as a probe of dark matter in neutron stars, on the basis of one-fluid models in which the dark matter is in chemical equilibrium with the neutrons. We computed in full general relativity the $g$- and $f$-modes of stars in which fermionic dark matter couples to the nucleons only through gravity, and inferr... Read full story

22:37 <Curie> Live Science | 'Freakish' discovery of 9 million-year-old capybara tooth supports idea that Atacama wasn't always a desert Damien Pine · 1h ago · 4 min read A 9 million-year-old capybara tooth was found in the Atacama Desert, a surprising find given that these rodents love water. Read full story

22:37 <Curie> Live Science | Big dogs age faster at an epigenetic level, new study finds RJ Mackenzie · 38m ago · 5 min read A new study that tracked dogs' aging by reading tiny chemical tags on their DNA found that larger dogs aged more quickly. Read full story

22:39 <Curie> arXiv.org | On the origin of the short-period Blue Straggler Stars in Collinder 261: a binary evolution approach 22h ago · 3 min read Building on the recent publication of a fresh catalog of blue straggler stars in Galactic open clusters using Gaia DR3, we conduct a study focusing on the blue straggler stars with short-period photometric variability found in the open cluster Collinder 261: nine eclipsing or ellipsoidal binaries and five SX Phe pulsator candidates. Our investigation delv... Read full story

22:39 <Curie> arXiv.org | Astrometric planet search around southern ultracool dwarfs: V. Discovery of the exoplanet candidate PALTA-1 b 22h ago · 3 min read We report the discovery of PALTA-1 b, a sub-Jupiter mass exoplanet candidate orbiting the nearby early-L dwarf DENIS-P J1253108-570924 (DE1253-57) located at a distance of ~17 pc. The exoplanet was discovered by monitoring the L dwarf's astrometric motion with FORS2 at the Very Large Telescope over more than eight years and characterising the deviations f... Read full story

22:39 <Curie> arXiv.org | The GAPS Programme at TNG. LXXX. Characterisation of the 400 Myr old multi-planet system K2-233 22h ago · 3 min read Understanding exoplanet physical properties is crucial for characterising their atmospheres and internal composition. Precise planetary masses are essential for constraining bulk densities and interiors, particularly in young systems hosting planets within or near the radius valley, where atmospheric mass loss may strongly shape their evolution. Here we r... Read full story

22:39 <Curie> arXiv.org | The existence of null points of flow and magnetic fields as prerequisites for the presence of astropauses and their co-location 22h ago · 4 min read Astropauses can be defined via magnetic or fluid separatrices. For the boundary layer between the stellar wind and the local interstellar medium, two separatrices can occur, the magnetopause and the hydropause. The question is whether they are identical. To address this, we investigate under which conditions the null points of the magnetic and velocity fi... Read full story

22:39 <Curie> arXiv.org | A faint dust ring beyond the compact disk of Sz 76 22h ago · 3 min read We report new ALMA Band 7 high-resolution ($\sim$0.05$^{''}$) continuum and $^{12}\text{CO}\ (J=3\text{--}2)$ observations of the disk around the young low-mass star Sz 76. Visibility-plane modeling reveals a previously undetected, faint outer dust ring centered at $\sim$45 au surrounding the compact central disk. Including this low-surface-brightness fea... Read full story

22:39 <Curie> arXiv.org | A Jupiter-like radio aurora in the L3.5 dwarf LSPM J0036+1821 22h ago · 3 min read Ultracool dwarfs exhibit radio emission revealing strong magnetic fields and complex magnetospheric processes. Their auroral emission resembles that observed in magnetized Solar System planets, providing a framework to investigate their magnetic topology. We aim to characterize the magnetic activity, rotation, and atmospheric variability of the L3.5 dwarf... Read full story

22:39 <Curie> arXiv.org | Dynamical pairing in gravitational wave populations 22h ago · 3 min read Binary black holes formed dynamically in star clusters are often associated with nearly equal-mass pairing. We show that this expectation is incomplete. The more general prediction of dynamical assembly is an ordered-pairing relation in which the two black holes are drawn independently from a common one--body mass spectrum and then ordered by mass. Once t... Read full story

22:40 <Curie> arXiv.org | Star Formation in the Low Surface Brightness Galaxies: a Comparison with the Outer Regions of Normal Galaxies Anatoly Zasov, Natalia Zaitseva, Anna Saburova · 22h ago · 3 min read Low surface brightness galaxies (LSB-galaxies) and the outer regions of disks of "normal" surface brightness galaxies (HSB-galaxies) are compared in terms of the radial distributions of star formation rates and efficiencies, as well as the Toomre stability parameter $Q_T$, using data from several samples of galaxies with high $HI$ content. It is shown tha... Read full story

22:40 <Curie> arXiv.org | Cosmic Birefringence from Large Lepton Asymmetry Kentaro Kasai, Ippei Obata · 22h ago · 2 min read Cosmic birefringence, the rotation of the polarization plane of CMB photons, provides an intriguing probe of physics beyond the Standard Model. In this paper, we investigate a vector Chern-Simons coupling between the neutrino current and photons as a possible origin of isotropic cosmic birefringence. Firstly, we perform the first analysis of anisotropic c... Read full story

22:40 <Curie> arXiv.org | A Deep Learning Approach to Improving the Arrival-Direction Accuracy of Gamma-Ray Air-Shower Measurements with the Tibet-III Air-Shower Array 22h ago · 3 min read The Tibet AS$γ$ experiment observes cosmic gamma rays from several teraelectron volts to the petaelectron volt range using an array of ground-based surface air-shower detectors (Tibet-III), which is composed of plastic scintillators. The arrival direction is conventionally reconstructed by fitting the shower front to detector hit-timing data, and the resu... Read full story

22:40 <Curie> arXiv.org | Gamma-rays from black hole coronae: disentangling the leptonic and hadronic contributions S\'ebastien Le Bihan, Daniel Gro\v{s}elj, Martin Lemoine · 22h ago · 3 min read IceCube detections of TeV neutrinos from nearby Seyfert galaxies imply, if confirmed, that the accompanying gamma rays are substantially reprocessed down to the MeV range by electromagnetic cascades, which places multi-messenger constraints on neutrino emission models. However, gamma rays can also be produced by the primary nonthermal electrons of the X-r... Read full story

22:40 <Curie> arXiv.org | A Novel Approach to Identify Unseen Companions: An In-Depth study of GDR3 220_28 22h ago · 3 min read Emission lines in the spectrum and the excess seen in the spectral energy distribution (SED) at infrared (IR) wavelengths serve as crucial indicators of accretion activity and the presence of gas and dust in the circumstellar environment of a young star. As accretion ceases over several million years, the H$α$ emission diminishes. However, IR excess combi... Read full story

22:40 <Curie> arXiv.org | Registering Gaia positions on VLBI images: constraining opacity-driven core shift in B 1038+528 / B 1038+529 M. H. Xu, Y. Y. Kovalev · 22h ago · 4 min read Because of the complex and time-variable radio structure of active galactic nuclei (AGNs), absolute astrometric positions cannot generally be registered unambiguously with specific features in VLBI images. We aim to register Gaia optical centroids on VLBI images with about 0.1 mas accuracy and to locate the optical emission relative to the radio core in t... Read full story

22:41 <Curie> arXiv.org | LazyTB: Extended LTB-solutions with Multiple Interacting Fluids 22h ago · 3 min read We present a low entry barrier numerical code LazyTB that solves the Einstein equations in the ADM-formulation for a general spherically symmetric problem with an arbitrary number of fluids with user defined equations of state and optional interactions between the fluids mediated by drag-vectors. We present the ADM equations in terms of carefully chosen d... Read full story

22:41 <Curie> arXiv.org | Remnant-wide mapping of heterogeneous presupernova burning histories in the O-rich ejecta of Cassiopeia A Yui Kuboike, Toshiki Sato, Kai Matsunaga · 22h ago · 3 min read Late-stage shell interactions, including shell mergers, can mix material across adjacent burning shells and imprint chemically inhomogeneous structures in the hydrostatic O-rich layers before core collapse. Whether such inhomogeneities survive the explosion and remain observable in the resulting supernova remnant is not well understood. We investigate the... Read full story

22:41 <Curie> arXiv.org | A comparison between particle and fluid approaches for streaming instability in global patch simulations 22h ago · 3 min read Identifying the process relevant to planet formation is still a major task. Mechanisms have been identified that can trap dust, preventing it from migrating inwards. A particular hydrodynamic instability, known as the streaming instability, is of high interest because it may be responsible for the formation of dust clumps from which the first planetesimal... Read full story

22:41 <Curie> arXiv.org | SAGE26 Paper I: Modelling the baryon cycle from cosmic dawn to the present day 22h ago · 3 min read We present SAGE26, a comprehensive update to the Semi-Analytic Galaxy Evolution (SAGE) model. SAGE26 integrates five observationally motivated improvements: (1) distinct circumgalactic medium and hot-halo gas physics, (2) molecular hydrogen for star formation, (3) velocity- and redshift-dependent supernova feedback, (4) bulge radii tracking through time, ... Read full story

22:41 <Curie> arXiv.org | $r$-Process as Production of Lanthanides from Compact Object Mergers 22h ago · 3 min read The relative contributions of binary neutron star (BNS) and black hole-neutron star (BH-NS) mergers to the Galactic enrichment from the rapid neutron-capture process ($r$-process) remain an open question in nuclear astrophysics. In this paper, we present end-to-end numerical simulations of binary population synthesis, nucleosynthesis, and Galactic chemica... Read full story

22:41 <Curie> arXiv.org | Evidence for a Similar Physical Origin Between Prompt Emission and X-Ray Flares of Gamma-Ray Bursts Wen-Yuan Yu, Wen-Long Zhang, Hou-Jun L\"{u} · 22h ago · 3 min read Statistical properties of X-ray flares are highly similar to those of the prompt emission in gamma-ray bursts (GRBs), suggesting that they may share a common physical origin (e.g., central engine activity). However, comparable statistical studies of afterglow X-ray flares and prompt gamma-ray pulses that are not observed simultaneously remain incomplete. ... Read full story

22:41 <Curie> arXiv.org | Light curve spectral energy distribution fitting of 13 carbon-rich Mira variables stars in the Small Magellanic Cloud 22h ago · 3 min read Carbon-rich Mira variables are highly dynamic stars characterized by large-amplitude radial pulsations and intense mass-loss. Standard spectral energy distribution (SED) fitting often relies on time-averaged observations, which flatten intrinsic variability and yield only approximate stellar and circumstellar parameters. To overcome these limitations, we ... Read full story

22:44 <Curie> arXiv.org | ASTRAL: A Framework for Optimal Placement and Emulation of Stellar Evolution Models Trevor Gravely, Marko Risti\'c, Brandon Barker · 22h ago · 3 min read Generating dense grids of detailed stellar evolution simulations is computationally prohibitive, as resolving progressively complex nucleosynthesis chains and dynamical timescales incurs a rapidly increasing computational cost that scales with dimensionality and resolution. Existing simulation grids are sparse, heterogeneous, and often cover disparate reg... Read full story

22:44 <Curie> arXiv.org | Complex Organic Molecules in Protostars with ALMA Spectral Surveys (COMPASS) V. Tracing cavity walls and shocked knots with nonthermally desorbed CH$_3$OH in BHR71-IRS1 22h ago · 4 min read Complex organic molecules are detected in both cold molecular clouds and the warm inner regions of protostars. Whether they are eventually inherited by protostars and planets or whether their chemistry is reset by in situ reactions remains unclear. Understanding the desorption mechanisms of these molecules is essential for tracing their chemical evolution... Read full story

22:44 <Curie> arXiv.org | Axion effects on hybrid stars: earlier hadron-quark phase transition and larger quark-matter cores 22h ago · 3 min read We investigate the effects of axions on the properties of hybrid stars and the possible hadron-quark phase transition in their cores within the Maxwell construction. The hadronic phase is described by the improved isospin- and momentum-dependent interaction (ImMDI) model, while the quark phase is modeled by a three-flavor Nambu--Jona-Lasinio (NJL) model w... Read full story

22:44 <Curie> arXiv.org | Polarised X-ray emission from the accreting millisecond pulsar SAX J1808.4-3658 during an X-ray outburst and a type-I X-ray burst 22h ago · 4 min read Modelling the X-ray pulse profiles of accreting millisecond pulsars (AMSPs) is a key technique to constrain the masses and radii of neutron stars. To this end, measuring the properties of polarised X-rays provides crucial information on the system geometry. We present the significant detection by IXPE of linearly polarised 2-8 keV X-rays during the decay ... Read full story

22:44 <Curie> arXiv.org | The Prompt Emission of Gamma-Ray Bursts from Population III Stars 22h ago · 3 min read Population (Pop) III stars, the first generation of stars in the Universe, have eluded direct detection for decades. The advent of the James Webb Space Telescope, with its unprecedented sensitivity to high-redshift sources, has renewed interest in the prospects for identifying these primordial stars. While previous studies have explored the direct detecti... Read full story

22:44 <Curie> arXiv.org | The Fast Transient Foreground Fog of LSST 22h ago · 3 min read Studies with 1-m class telescopes have now established that glints from satellites and space debris are the main obstacles to searches for sub-minute optical transients. Here, we report a study of this foreground using observations from the Legacy Survey of Space and Time (LSST) with the Simonyi 8.4-m telescope at the Vera C. Rubin Observatory. From 2,955... Read full story

22:44 <Curie> arXiv.org | Scalar Perturbations and Induced Gravitational Waves from First-Order Phase Transitions in Lattice Simulations 22h ago · 3 min read Cosmological first-order phase transitions can generate curvature perturbations through inhomogeneous quantum tunneling, as studied previously on superhorizon scales. In this work, we for the first time conduct three-dimensional lattice simulations that incorporate scalar metric perturbations and radiation perturbations, covering a range from bubble wall ... Read full story

22:44 <Curie> arXiv.org | Constrained Diffusion for Data-Scarce Orbital Monte Carlo in Constellation Tasking 22h ago · 3 min read Constellation Monte Carlo results depend on the orbital population used to evaluate a tasking policy. With scarce reference trajectories, replay limits geometric diversity, while independent orbital-element jitter can violate physical constraints. We study constrained diffusion for orbital-population augmentation. A force-conditioned diffusion model learn... Read full story

22:44 <Curie> arXiv.org | Effects of Magnetic Fields on Solar Inertial Modes in Global Nonlinear Simulations 22h ago · 3 min read Solar inertial modes are increasingly viewed as probes of the solar interior, with recent helioseismic evidence indicating that these modes may be sensitive to the internal magnetic field. We investigate the role of magnetic fields on inertial mode excitation and dynamics using global nonlinear MHD simulations with differential rotation forced toward a he... Read full story

22:44 <Curie> arXiv.org | The Impact of Galaxy Catalogue Completeness with GLADE+ on Dark Siren Cosmology: A Line-of-Sight Prior Analysis of GWTC-3 Events 22h ago · 3 min read Cosmological parameters can be estimated from dark sirens, gravitational waves events without electromagnetic counterpart, by using inference methods which estimate statistically the source redshift from galaxy catalogs. We study the effects of applying different apparent magnitude cuts to the GLADE+ catalog, analyzing events from the third LIGO-Virgo-KAG... Read full story

22:45 <Curie> arXiv.org | Detection of escaping magnesium in the upper atmosphere of WASP-76b 22h ago · 3 min read Near-ultraviolet (NUV) observations can uniquely probe low-density, high-altitude gas in ultra-hot Jupiters (UHJs) via strong resonance lines of metals. WASP-76b is a well-studied UHJ with prior detections of refractory metals and complex day-night chemistry, making it a prime target for atmospheric escape diagnostics in the NUV. We present HST/STIS E230M... Read full story

22:45 <Curie> arXiv.org | Polarimetric Behaviour of (3200) Phaethon: New Observations with Implications for Surface Heterogeneity 22h ago · 3 min read The near-Earth asteroid (3200) Phaethon exhibits unusually high linear polarisation at large phase angles. Previous observations revealed a significant difference between apparitions: measurements obtained in 2016 showed a polarisation up to $\sim10$ percentage points higher than those obtained in 2017 at comparable phase angles. The distinct surface regi... Read full story

22:45 <Curie> arXiv.org | Assessment of sky brightness in central Portugal: the Dark Sky destination "Aldeias do Xisto" case study 22h ago · 3 min read A combination of remote sensing techniques, open space data and field testing was developed to derive astronomical and meteorological parameters and assess Dark Sky brightness of the hitherto unstudied Schist Villages region in the mountainous Interior Center of Portugal. This study covered the period 2012-2017 and established the methodology for regular ... Read full story

22:45 <Curie> arXiv.org | (Monty Python and the) HoliGRALE: A Hybrid GRALE Lens Inversion Methodology Diagnostically Evaluated with Synthetic and Real Data 22h ago · 3 min read We present HoliGRALE (Hybrid, only light included, GRAvitational LEnsing), a hybrid lens modeling extension of the freeform method GRALE. HoliGRALE incorporates physically motivated parametric components within the freeform genetic algorithm GRALE. Using three synthetic clusters from IllustrisTNG, each of varying complexity, we evaluate its performance ac... Read full story

22:45 <Curie> arXiv.org | Euclid Quick Data Release (Q1). Exploring the complexity of quenching processes across time, environment, and mass through recently quenched galaxies 22h ago · 22 min read Recently quenched galaxies (RQGs) provide insights into galaxy quenching. We present a photometric and spectroscopic analysis of RQGs using the first Euclid Quick Data Release (Q1). Using rest-frame UVJ colours, we classify star-forming (SFGs), quiescent (QGs), and recently quenched galaxies at 0.20.5, suggesting earlier quenching in dense regions. RQGs s... Read full story

22:45 <Curie> arXiv.org | A method for multimodal analysis of TAIGA experiment data using essential features 22h ago · 3 min read The aim of processing and analyzing experimental data from physical experiments is to obtain physically significant information about the phenomenon under study. This goal is achieved by multi-stage processing of experimental data, during which noise associated with measurements is suppressed and the dimensionality of the input data is reduced. In this pa... Read full story

22:45 <Curie> arXiv.org | CHemical Evolution in MassIve star-forming COres (CHEMICO). II. Molecular ions, electron fraction, and cosmic-ray ionisation rate 22h ago · 4 min read Molecular ions are crucial in initiating and regulating the formation of molecules in the interstellar medium, and are expected to be sensitive tracers of evolution in star-forming regions. Within the framework of the project `CHemical Evolution of MassIve star-forming COres' (CHEMICO), we investigate the temporal evolution of molecular ions towards three... Read full story

22:46 <Curie> arXiv.org | Can LISA See Inside the Little Red Dots? 22h ago · 3 min read The Little Red Dots (LRDs) are compact, broad-line sources that appear to contain accreting black holes (BHs) embedded in dense gas. Proposed models for their central environments (including quasi-stars, radiative BH envelopes and super-Eddington accretion discs) predict gas densities at the radii probed by an extreme-mass-ratio inspiral that differ by ma... Read full story

22:46 <Curie> arXiv.org | Turbulent viscosity in line-driven stellar winds 22h ago · 3 min read Radiation-driven winds from massive stars generate powerful outflows known to be intrinsically turbulent. Despite this, standard hydrodynamic models have historically restricted the application of macroscopic turbulent viscosity to rotationally supported disks, neglecting its dynamic role in the supersonic expansion regime of the wind. We evaluated the dy... Read full story

22:46 <Curie> arXiv.org | Measuring the Clustering of tSZ-Selected Galaxy Clusters with SPT-3G 22h ago · 5 min read We present a measurement of the spatial clustering of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (tSZ) signal. Using a cluster catalog derived from five years of SPT-3G Main field survey data, we define a sample spanning $0.25 < z < 1.1$, as well as two subsamples spanning $0.25 < z < 0.67$ and $0.67 < z < 1.1$. We detect cluster clusteri... Read full story

22:52 <Curie> arXiv.org | Predictions for Short Gamma-Ray Burst Detections by COSI 22h ago · 3 min read The Compton Spectrometer and Imager (COSI) is a soft gamma-ray telescope scheduled to launch in 2027. COSI will trigger onboard the spacecraft in response to short-duration transients, including gamma-ray bursts, and it will promptly disseminate alerts which include localizations to the community. This will enable rapid follow-up observations of the after... Read full story

22:52 <Curie> arXiv.org | Early onset of the hot circumgalactic medium around Milky Way galaxies 22h ago · 3 min read Hot coronae are key regulators in Milky Way (MW)-type galaxy formation and are thought to emerge once a galaxy's dark matter halo crosses a critical mass threshold, $M_{\mathrm{vir}}\sim10^{12} {\mathrm{M}}_\odot$, so that accretion shocks can heat infalling gas to virial temperatures, $T_{\mathrm{vir}}$. Here we investigate the roles of stellar feedback ... Read full story

22:52 <Curie> arXiv.org | Re-calibrated analytic stellar evolution formulae for the main sequence: Extension to massive stars and variations in $[α/\mathrm{Fe}]$ Conor M Byrne, Elizabeth R Stanway, Jan J Eldridge · 22h ago · 3 min read Analytic formulae are an efficient way to approximate the evolution of a star of a given mass and chemical composition, and are widely used in the literature to compute large grids of evolutionary models for stellar population synthesis. Such formulae rely on calibration to detailed stellar evolution models, and existing versions are based on a sparse, li... Read full story

22:52 <Curie> arXiv.org | Searching for hot water world candidates with CHEOPS: II. A low-density super-Earth orbiting the K dwarf TOI-2211 22h ago · 5 min read Small exoplanets on close-in orbits are exposed to high levels of stellar irradiation, which can effectively remove low-mass primordial H/He envelopes through atmospheric escape. Under these conditions, planets whose masses and radii are incompatible with both bare rocky interiors and extended H-dominated atmospheres are therefore expected to host high me... Read full story

22:52 <Curie> arXiv.org | PEARLS: NuSTAR and XMM-Newton Extragalactic Survey of the JWST North Ecliptic Pole Time-Domain Field V: Unraveling X-ray Spectral Variability 22h ago · 3 min read As one of the first deep time-domain surveys in the hard X-ray band, the NuSTAR campaign in the JWST North Ecliptic Pole Time Domain Field (NEP-TDF) offers a prime opportunity to measure variability in a faint population of Active Galactic Nuclei (AGN) in the medium-to-high redshift universe. In the X-ray band, AGN variability is generally caused by chang... Read full story

22:52 <Curie> arXiv.org | The BUFFALO Survey : The Subhalo Mass Function for Abell 2744 with Strong+Weak Gravitational Lensing 22h ago · 3 min read We present a combined strong and weak gravitational lensing mass model of the massive merging galaxy cluster Abell 2744 (z = 0.308). The mass reconstruction combines strong-lensing constraints in the cluster core with weak-lensing measurements derived from deep imaging with the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST), enabli... Read full story

22:52 <Curie> arXiv.org | A Newly Identified Transient Ultraluminous X-ray Source in M31 22h ago · 3 min read Ultraluminous X-ray sources (ULXs) are off-nuclear X-ray sources with luminosities exceeding the Eddington limit of typical stellar-mass compact objects. While most known ULXs are relatively persistent sources, transient ULXs have emerged as a distinct population that offer unique insight into extreme, super-Eddington accretion. We report the discovery an... Read full story

22:52 <Curie> arXiv.org | Debye cooling of ultramassive white dwarfs David Barba-Gonz\'alez, Sivan Ginzburg · 22h ago · 3 min read Recent observations of cold and massive white dwarfs are beginning to probe Debye cooling: an accelerated cooling phase driven by the vanishing heat capacity $C_V(T)$ of the crystallized interiors at low temperatures $T$, due to the quantum nature of phonon oscillations. We analyse this regime by calculating, both analytically and numerically, the instant... Read full story

22:52 <Curie> arXiv.org | Full-Shape Analysis of the Redshift-Space Galaxy Trispectrum in the EFTofLSS Beatriz Tucci, Oliver H. E. Philcox · 22h ago · 3 min read The effective field theory of large-scale structure (EFTofLSS) program for spectroscopic galaxy surveys has been remarkably successful for cosmological inference from the galaxy power spectrum and bispectrum. However, a full-shape cosmological analysis including the galaxy trispectrum has not yet been performed. In this work, we develop the tree-level EFT... Read full story

22:52 <Curie> arXiv.org | Modeling the nanohertz gravitational wave background with the t-process: Improved frequentist analysis of gravitational-wave power 22h ago · 4 min read Pulsar timing array (PTA) collaborations have recently reported evidence for a gravitational wave background (GWB) signal in the nanohertz band, which most likely originates from the incoherent superposition of GWs emitted by a population of supermassive black hole binaries (SMBHBs). Since the number of binaries emitting in each frequency bin is finite, a... Read full story

22:53 <Curie> arXiv.org | KDG 162: A Nearby Isolated Star-forming Dwarf Galaxy 22h ago · 3 min read The nearby dwarf galaxy KDG 162 (also known as KK 153) has recently attracted attention as a potentially gas-rich, isolated, and low-mass dwarf galaxy. However, many of these characterizations depend on the true distance to KDG 162. Here we present new Hubble Space Telescope (HST) imaging that resolves individual stars down to 3 magnitudes below the tip o... Read full story

22:53 <Curie> arXiv.org | Extreme Stellar Death and Galaxy Feedback at z = 2: A Rest-frame Ultraviolet Characterization of the Strongly Lensed Superluminous Supernova 2025wny 22h ago · 4 min read We present photometric and spectroscopic follow-up observations of the strongly-lensed H-poor superluminous supernova (SLSN) 2025wny at $z = 2.0155$. We use integral-field Keck-II/KCWI spectroscopy to obtain rest-frame ultraviolet spectra spanning $11$ to $61$ days after maximum light. We use Pan-STARRS photometry to constrain the brightest image's magnif... Read full story

#science on 2026-10-08