04:00 <Curie> arXiv.org | Temperature effects on white dwarfs in modified gravity Sof\'ia Vidal, Aneta Wojnar, Laur J\"arv · 4h ago · 2 min read In this article we analyze the effects of a finite temperature equation of state on the equilibrium structure of white dwarfs in massive Brans-Dicke theory as well as the symmetron and dilaton screening mechanisms. We compute and present the numerically obtained mass-radius relation, effective gravitational constant as well as radial profiles of the scala... Read full story

04:00 <Curie> arXiv.org | ACT stands for Awkward Cosmology Theories Loris Del Grosso, Alfredo Urbano, Marcello Ziccolella · 4h ago · 3 min read Recent Atacama Cosmology Telescope (ACT) observations, combined with Planck, favor a scalar spectral index in tension with Starobinsky inflation. Two main strategies have been proposed to reconcile Starobinsky inflation with these data: (i) including higher-curvature operators in the gravitational action, and (ii) modifying the post-inflationary reheating... Read full story

04:00 <Curie> arXiv.org | Classical conformal invariance and superhorizon dynamics in de Sitter Maria Cristina Fiore, Andrea F. Sanfilippo · 4h ago · 3 min read Soft de Sitter Effective Theory is a well-motivated candidate for the correct effective late-time description of equal-time correlation functions in de Sitter space. In this work, we study its application to theories that enjoy classical conformal invariance, using the conformally-coupled $ϕ^4$-theory as a toy model. While quantum effects generate non-tri... Read full story

04:00 <Curie> arXiv.org | Linear causality and stability constraints on relativistic second-order magnetohydrodynamics Yiwei Qiu, Duan She, Defu Hou · 4h ago · 3 min read In this work, we construct a theoretical framework for relativistic second-order magnetohydrodynamics based on entropy current analysis. The formalism consistently incorporates finite relaxation dynamics of the dissipative fluxes, providing a transient framework suitable for analyzing linear stability and short-wavelength causality. Utilizing linear mode ... Read full story

04:00 <Curie> arXiv.org | Radial Oscillations of Viscous Stars Lennox S. Keeble, Jaime Redondo-Yuste · 4h ago · 3 min read Oscillation modes of neutron stars, a key target for third-generation gravitational wave detectors, encode key information about their constituent nuclear matter. In this work, we study the effect of viscosity on oscillations of cold, polytropic, spherically symmetric neutron stars. We focus on purely radial oscillations and work perturbatively to linear ... Read full story

04:00 <Curie> arXiv.org | New Massless Spectra from Cosmic String Cusps Amelia Drew, Ivan Rybak · 4h ago · 3 min read In the standard picture of cosmic strings, cusps are generic features of Nambu-Goto loops where the string momentarily reaches the speed of light. They have a characteristic sharp profile, following $y \sim x^{2/3}$ in the $(x,y)$ plane, and produce strong gravitational-wave (GW) bursts with waveform $\tildeκ(ω) \propto ω^{-4/3}$, making them key targets ... Read full story

04:01 <Curie> arXiv.org | Self-Interacting Dark Matter: From Particle Physics Theories to Structure Formation Simulations 4h ago · 3 min read We present a unified theory-to-simulation framework for self-interacting dark matter (SIDM), combining a self-contained introduction to its particle-physics foundations and representative benchmark models with an explicit, systematic mapping to simulation inputs and validated numerical implementations in the moving-mesh code AREPO-2. We characterize repre... Read full story

04:01 <Curie> arXiv.org | Radio Continuum Study of One of the Brightest Large Magellanic Cloud Supernova Remnants N 132D 4h ago · 3 min read We present a new radio continuum study of the Large Magellanic Cloud supernova remnant N 132D using observations from the Australia Telescope Compact Array (ATCA) and MeerKAT. The radio morphology shows a clear spatial correlation with the X-ray emission in the central and left regions of the remnant, as well as in the right portion of the shell, indicati... Read full story

04:01 <Curie> arXiv.org | LazyTB: Extended LTB-solutions with Multiple Interacting Fluids 4h 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

04:01 <Curie> arXiv.org | XuYi Interferometer Observation Simulator 4h ago · 3 min read The XuYi Interferometer is the first Chinese long-baseline optical interferometer currently under development by the National Institute of Astronomical Optics and Technology (NIAOT) of the Chinese Academy of Sciences. In preparation for future scientific operations, we developed the XuYi Interferometer Observation Simulator (XIOS), a lightweight MATLAB-ba... Read full story

05:00 <Curie> NASA Science | Isaias Dims the Gulf Coast Lauren Dauphin · 1h ago · 6 min read High-definition images of nighttime lights show where the hurricane knocked out power along the Florida Panhandle and how quickly the lights came back. Read full story

05:00 <Curie> NASA Science | APOD: 2026 October 16 – Chasing the International Space Station Jerry Bonnell · 55m ago · 1 min read APOD Science APOD APOD: 2026 October 16 –… 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. To view this […] Read full story

10:42 <Curie> Live Science | Scientists detect the reddest and greenest stars ever seen in surprising survey of 150 'white' dwarfs Elizabeth Howell · 42m ago · 4 min read Stellar remnants called white dwarfs ‪appear to come in a rainbow of colors, according to a new study. Read full story

10:47 <Quasar> Space | It's time to reassess the size of our solar system, scientists say Leonard David · 47m ago · 4 min read The edge of our solar system may be defined not by a sharp boundary, but by a "complex dance among forces, energies and trajectories," two researchers argue. Read full story

12:43 <Quasar> Space | Rocket Lab pushes 1st launch of next-gen Neutron rocket to 2027 Mike Wall · 43m ago · 3 min read "We believe Neutron is going to be a game changer, and taking the time now to solve these challenges means we're in a better position to deliver a rocket that's ready to meet the needs for the industry for years to come." Read full story

14:07 <Quasar> Space | 'We are getting a lot of pressure from the administrator himself': How NASA is racing to obey Trump's 'Super Intelligence' order Josh Dinner · 12m ago · 11 min read Get ready for the "new era of Super Intelligence." Read full story

14:07 <Quasar> Space | Supermassive black hole blasts out a neon 'treble clef' | Space photo of the day for Oct. 16, 2026 Chelsea Gohd · 7m ago · 2 min read A black hole and a galactic collision teamed up to create something wild. Read full story

14:08 <Curie> NASA Science | NASA's Hubble Spies Spiral’s Edge Andrea Gianopoulos · 1h ago · 2 min read This Hubble image features the edge-on, intermediate spiral galaxy NGC 1827, located roughly 37 million light-years away. Read full story

14:08 <Quasar> ScienceDaily | Astronomers discover a strange universal rule behind black hole eruptions 7h ago · 10 min read Scientists have discovered that black holes of vastly different sizes appear to launch powerful jets according to the same universal rule. The breakthrough could explain why some black holes suddenly erupt years after devouring a star and help astronomers predict when these spectacular outbursts will happen. Read full story

14:08 <Quasar> ScienceDaily | Scientists discover a plastic-eating “Pac-Man” enzyme with a surprising secret 7h ago · 12 min read Scientists have discovered a remarkable “Pac-Man enzyme” that helps bacteria devour certain types of plastic and may offer new hope in the fight against plastic pollution. Researchers found that several biodegradable plastics completely broke down in soil within about a year, while conventional plastic remained largely unchanged. Read full story

14:09 <Quasar> ScienceDaily | Yale scientists discover how stress changes the brain to make memories stronger 6h ago · 8 min read Yale scientists have uncovered how the stress hormone cortisol helps the brain turn emotional experiences into stronger, longer-lasting memories. The discovery reveals that stress can reshape communication between brain networks involved in emotion and memory, potentially explaining why certain moments are so difficult to forget. Read full story

14:09 <Quasar> ScienceDaily | A quantum highway just one atom high could transform superconductors 13h ago · 6 min read Scientists discovered that atomic steps just one atom high can guide quantum vortices through superconductors, making them move more than 1,000 times more easily in one direction than another. This remarkable control over quantum motion could lead to a new generation of ultra-efficient superconducting electronics. Read full story

14:09 <Quasar> ScienceDaily | USC scientists discover how to create a never-ending supply of cancer-fighting cells 5h ago · 12 min read USC scientists have discovered a way to create a potentially renewable supply of genetically engineered immune cells that can attack cancer and strengthen the body's natural defenses. By growing and modifying immature immune cells rather than mature ones, researchers developed a system that can continuously produce tumor-fighting cells inside the body. Read full story

14:09 <Quasar> ScienceDaily | A protein that fuels cancer could also be the key to fighting it 13h ago · 7 min read Scientists have discovered how to turn a protein that normally fuels cancer growth into a weapon against it. By activating PPARD in immune cells, researchers made them better at burning fat and attacking tumors, slowing or stopping cancer growth in laboratory experiments. The approach showed promise against colorectal, breast, and ovarian cancers, as well... Read full story

14:09 <Quasar> ScienceDaily | NASA captures strange waves high above Hurricane Simon 12h ago · 6 min read As Hurricane Simon unleashed destructive winds and flooding along Mexico’s coast, NASA satellites captured an extraordinary sight: massive atmospheric waves rippling high above the storm. The rare images reveal how powerful hurricanes can disturb the upper atmosphere, creating patterns that are usually invisible from space. Read full story

14:09 <Quasar> ScienceDaily | Antarctica’s sea ice has undergone a stunning reversal 16h ago · 6 min read Antarctic sea ice reached its third-lowest winter maximum in 2026, extending a remarkable decline that began after years of record-breaking growth. Scientists are investigating whether the dramatic reversal signals a long-term shift in Antarctica's frozen landscape. Read full story

14:09 <Quasar> ScienceDaily | The uranium cubes that exposed Nazi Germany’s nuclear failure 5h ago · 7 min read Scientists investigating Nazi Germany's secret nuclear program have uncovered evidence that its final experimental reactor was nowhere near as close to working as previously claimed. Analysis of surviving uranium cubes and wartime documents reveals that Germany lacked the enormous quantities of uranium and heavy water needed to make its reactor operational. Read full story

14:09 <Quasar> ScienceDaily | “Crawzilla” was huge. Then scientists found an even bigger crayfish 14h ago · 8 min read A nationwide search for giant crayfish uncovered a record-breaking Tennessee specimen and a surprising mystery about how big these freshwater creatures can grow. Scientists found that North American crayfish seem to hit a biological size limit, possibly because of their muscles or protective shells. Read full story

14:09 <Quasar> Quanta Magazine | He Wants AI Benchmarking To Be a Science, Not a Dark Art John Pavlus · 44m ago · 10 min read Moritz Hardt, author of a new book on benchmarks, believes these “standardized tests” for artificial intelligence are fundamentally broken — but not unfixable. Read full story

15:06 <Curie> NASA | I Am Artemis: Allison Mjoen Matina Douzenis · 42m ago · 3 min read As the supercooled propellant flowed into the core stage, and NASA’s SLS (Space Launch System) rocket roared to life, Allison Mjoen and her family watched Read full story

15:07 <Quasar> Space | Here are the best ways to use stargazing apps Chris McMullen · 37m ago · 6 min read There are plenty of stargazing apps out there and if you want to make the most of them we've got you covered. Read full story

15:07 <Quasar> Space | 7 best places to see the northern lights, according to an aurora chaser Daisy Dobrijevic · 6m ago · 14 min read I've chased the northern lights across the Arctic. Here are seven destinations worth considering for your next aurora adventure. Read full story

15:08 <Curie> Live Science | Fossil of 'unconquered female warrior' dinosaur with long claws found in UK museum drawer after 100 years Kenna Hughes-Castleberry · 11m ago · 5 min read The newly identified Invictibellatrix amberina lived about 120 million years ago and represents the first megaraptoran dinosaur found in Europe, according to a new study. Read full story

16:07 <Quasar> Space | Why can you see the moon during the day? This week is the perfect time to find out Jamie Carter · 7m ago · 5 min read You don't have to wait until dark to see the moon. Here's why it appears in broad daylight — and why this week is a particularly good time to spot it. Read full story

16:07 <Quasar> Space | The TWA Hotel is about to rocket back to the Space Age with 'Mission 60s' celebration in NYC Robert Z. Pearlman · 7m ago · 5 min read The three-day celebration, from Oct. 23 to Oct. 25, will bridge the Apollo and Artemis eras. Read full story

17:03 <Curie> NASA | Artemis II Heat Shield After Splashdown HQ Web Team · 35m ago · 5 min read Shortly after NASA's Artemis II mission splashed down on April 10, 2026, U.S. Navy divers captured underwater imagery of the Orion spacecraft’s heat shield. Read full story

17:10 <Quasar> Space | 'Dark Matter's' Joel Edgerton and Jennifer Connelly talk S2's marital disintegration and the humility of hanging on wires (interview) Jeff Spry · 10m ago · 4 min read 'It makes you think about how you can be a better person in life. And there’s always room for improvement.' Read full story

18:07 <Quasar> Smithsonian Magazine | Dam Removals Are Bringing Fish Back Across the Northeastern United States, Striking Down One Tiny Barrier at a Time REPRINT AUTHOR PLACEHOLDER · 52m ago · 19 min read While the demolition of big dams in the West gets more attention, many of these often-obsolete obstructions are also coming out of northeastern streams and rivers—and herring are returning in droves Read full story

18:07 <Quasar> Space | On this day in space! Oct. 16, 1975: NASA launches the 1st-ever GOES weather satellite to watch Earth from space Hanneke Weitering · 48m ago · 3 min read An artist's illustration of the GOES-1 weather satellite. Read full story

18:07 <Quasar> Space | SpaceX thrusters just made a Tesla Roadster 'fly' (and Elon Musk's car is still out there in space) Mike Wall · 29m ago · 5 min read "This is not necessarily a safety-optimized car, OK? But it takes the the fun meter to 11 out of 10." Read full story

18:07 <Quasar> Space | How to see the Orionid meteor shower 2026 peak this week — and when to look Joe Rao · 7m ago · 5 min read The Orionids peak around Oct. 21. Here's when and where to look for the best chance of spotting meteors. Read full story

18:07 <Quasar> Space | Scientists find 'gemstones' in atmosphere of bizarre, scorching-hot 'marshmallow' exoplanet Robert Lea · 7m ago · 3 min read "Planets are temperamental, their atmospheres complex and chaotic." Read full story

20:35 <Curie> NASA | NASA Names Stephen Cash Marshall Space Flight Center Director Gerelle Q. Dodson · 20m ago · 3 min read NASA Administrator Jared Isaacman has named Stephen Cash director of the agency’s Marshall Space Flight Center in Huntsville, Alabama, effective Monday, Oct. Read full story

20:35 <Quasar> Space | When not to watch a meteor shower — why I'm not staying up for the Orionids Jamie Carter · 35m ago · 6 min read The Orionid meteor shower peaks next week, but a bright moon makes much of the night less than ideal. Sometimes the sensible observing decision is knowing when to stay in bed — and when to get up early. Read full story

21:42 <Curie> Live Science | Physicists find evidence of weird quantum strings nearly 100 years after they were predicted Larissa G. Capella · 57m ago · 5 min read Atoms confined to a single line can bind into clusters called Bethe strings. A new experiment points to a mix of many such clusters, though the evidence is indirect. Read full story

21:42 <Curie> Live Science | Earliest pet dogs in the Americas may have lived at this 13,800-year-old site in Alaska Kristina Killgrove · 47m ago · 7 min read Archaeologists have discovered an ancient base camp in Alaska that has evidence of the oldest dwelling and possibly the earliest domesticated dogs in the Americas. Read full story

21:47 <Curie> arXiv.org | Fast X-ray Transient EP260321a: Shock Breakout through an Extended Circumstellar Matter Maokai Hu, Yi Yang, Xiaofeng Wang · 21h ago · 3 min read The Einstein Probe (EP) has discovered a fast X-ray transient, EP260321a, whose optical counterpart was subsequently classified as a broad-lined Type Ic supernova. Its observed rise time of about 690 seconds is inconsistent with theoretical predictions for shock breakout (SBO) from a Wolf-Rayet star, which is typically regarded as the progenitor of envelo... Read full story

21:47 <Curie> arXiv.org | JWST lensed quasar dark matter survey V: Hints of self-interacting dark matter from 29 quadruply imaged quasars 21h ago · 3 min read Theories of self-interacting dark matter (SIDM) predict the eventual core collapse of dark matter halos, a process that transforms these structures into extremely efficient gravitational lenses. We present a population-level inference on the abundance of core collapsed halos and subhalos in the mass range $10^6 - 10^{10.7} M_{\odot}$ using 29 quadruply im... Read full story

21:47 <Curie> arXiv.org | The optical high-resolution spectral archive of the HERMES spectrograph mounted on the 1.2m Mercator telescope 21h ago · 3 min read Context. The HERMES spectrograph is a high-resolution, fibre-fed optical spectrograph of the 1.2m Mercator telescope operated from the Roque de los Muchachos observatory in Spain. HERMES started its scientific operations in June 2009 and has been the workhorse instrument since then. Regular instrument updates have been crucial. They have helped to ensure ... Read full story

21:47 <Curie> arXiv.org | Beyond the BLUE I: the advantage ceiling - how much can any estimator beat the matched filter in mm/submm survey data? Kaustuv Basu · 21h ago · 4 min read Papers claiming that convolutional neural networks outperform the matched filter are now common in astronomy. Since that filter is the best linear unbiased estimator (BLUE) for any noise of given covariance, and the minimum-variance unbiased estimator under Gaussian noise, such a claim requires that the noise covariance varies from image to image or the n... Read full story

21:47 <Curie> arXiv.org | TEMPUS: Relativistic coordinate time scales for any solar-system body from arbitrary ephemerides Yan Seyffert, Agn\`es Fienga · 21h ago · 3 min read Precise time-scale transformations between solar-system bodies are an essential requirement for deep-space science and solar system navigation. The post-Newtonian relativistic expression relating a body-centered coordinate time TCX to the Barycentric Coordinate Time TCB depends on the gravitational environment and velocity of the target body, and must be ... Read full story

21:47 <Curie> arXiv.org | The Kick Velocities of Neutron Stars in Binary Systems Paul Disberg, Ilya Mandel, Ryosuke Hirai · 21h ago · 3 min read Neutron stars (NSs) receive natal kicks on their formation in supernovae (SNe). We consider constraints placed on the natal kick magnitudes by NSs in different classes of binary systems. We compare observed systems to predictions from the COMPAS rapid population synthesis code, where we apply kick models with varied natal kick prescriptions. Specifically,... Read full story

21:47 <Curie> arXiv.org | A binary black hole merger rate comparison within the same metallicity-star formation rate framework 21h ago · 3 min read Recent studies have suggested that binary population synthesis models, when coupled with observationally based, metallicity-dependent SFRD, overpredict the observed local BBH merger rate density. The significance of this tension might vary depending on the specific code and parameters adopted. Thus, a more extensive exploration of the parameter space is r... Read full story

21:47 <Curie> arXiv.org | ATLAS. III. Dust Around Little Red Dots: Hydrogen Line Ratios beyond Dust-free Non-Case B Models 21h ago · 3 min read We investigate broad hydrogen line ratios in little red dots (LRDs) using five high-redshift ($z>2$) sources from JWST/NIRSpec medium/high-resolution spectra in the DAWN JWST Archive and fifteen low-redshift sources ($z=0.1$--$0.9$) from the literature, all with broad H$β$ detected at $>5σ$. After carefully measuring the broad-line fluxes while accounting... Read full story

21:47 <Curie> arXiv.org | Co-design of ground-based gravitational wave detector networks 21h ago · 3 min read Discussions around the design philosophy and location of the next generation of ground-based gravitational wave detectors are still underway. In this context, we propose IfoScout, an innovative methodology for detector co-design based on state-of-the-art machine-learning (ML) techniques. As a simple demonstration, we present a two-stage simulation of a ne... Read full story

21:47 <Curie> arXiv.org | A Deep Look at the Ultra-Faint Milky Way Satellite Virgo III with Rubin Observatory Data Preview 2 21h ago · 4 min read We analyze the ultra-faint Milky Way satellite Virgo III using data from the Vera C. Rubin Observatory Data Preview 2 (DP2). Virgo III was observed in the Rubin "Cosmic Treasure Chest" (M49) First Look field, which contains 924 visits in the u,g,r,i bands comprising ~10.5hrs of exposure time with LSSTCam. These data are considerably deeper than the majori... Read full story

21:48 <Curie> arXiv.org | Repulsive ultralight dark matter from Hosotani mechanism Philippe Brax, Patrick Valageas · 21h ago · 3 min read We build an ultralight dark matter model with repulsive self-interactions, starting from a 5D action that only includes a $U(1)$ gauge field and several massive and charged free fermions. The dark matter scalar field corresponds to the fifth component of the gauge field, after compactification to 4D. Although the single-fermion case only leads to attracti... Read full story

21:48 <Curie> arXiv.org | Dissecting the 3D chemo-dynamical structures of NGC~1381: A galaxy hosting an ancient slow bar with an accretion-related bulge and thick disc 21h ago · 3 min read We applied the barred population-orbit superposition method developed in our 2025 papers to construct 3D chemo-dynamical models for the barred S0 galaxy NGC1381 in the Fornax cluster. Based on the stellar orbits in the models, we decomposed NGC1381 into six components: (1) a dynamically warm nuclear disc with $f_{\rm nucl}\sim5\%$; (2) a rigidly rotatin... Read full story

21:48 <Curie> arXiv.org | A grid of fast-rotating, chemically-homogeneous, supernova and/or long-GRB progenitors 21h ago · 3 min read The understanding of the mechanism(s) by which massive stars collapse and possibly explode is rapidly maturing. Uncertainties in the structure of the stellar core at the onset of collapse are often dominant in numerical simulations, and a limited number of progenitor grids are available. This is especially true for explosions where rotation and magnetic f... Read full story

21:48 <Curie> arXiv.org | Mock Catalogs of Strongly Lensed Gravitational Waves via a Halo Model Approach with Space-borne Detectors 21h ago · 3 min read Future space-borne gravitational-wave (GW) detectors, such as LISA and DECIGO, are expected to detect a large number of GW events, a fraction of which may be strongly lensed by intervening galaxies or galaxy clusters. In this work, we develop a comprehensive framework to simulate strongly lensed GWs in the context of space-borne detectors. Based on realis... Read full story

21:48 <Curie> arXiv.org | The impact of gamma-ray propagation effects on indirect dark matter searches 21h ago · 3 min read In this work, we investigate dark matter (DM) detection in the context of weakly interacting massive particles (WIMPs). Upon annihilation, WIMPs generate cascades of secondary particles through various channels, many of which culminate in the production of gamma rays. As these gamma rays travel toward Earth, their spectra are reshaped by interactions with... Read full story

21:48 <Curie> arXiv.org | Confidently Wrong: Why Ignoring Binaries Biases IMF Inference at Large Sample Sizes Anna L. Rosen · 21h ago · 3 min read The stellar initial mass function (IMF) high-mass slope $α$ is routinely measured by fitting single-star models to photometric samples that contain unresolved binaries. This practice introduces a systematic negative bias on $α$ that is constant with sample size $N$. Posterior credible intervals shrink as $1/\sqrt{N}$, so at sufficiently large $N$ the bias... Read full story

21:48 <Curie> arXiv.org | Dark matter dynamical friction on binary stars in the faintest dwarf galaxies: I. Analytical approach Nicolas Esser · 21h ago · 3 min read We study binary stars moving through a uniform dark matter background and experiencing dynamical friction. The centre-of-mass motion of the pairs is taken into account. We derive formulas and timescales for the secular evolution of the orbital parameters for both wide and close binaries. Applying these results to environments typical of the faintest ultra... Read full story

21:48 <Curie> arXiv.org | Using 23 Years of ACS/SBC Data to Understand Backgrounds: Explaining & Predicting Background Variations 21h ago · 3 min read Recent analysis of 23 years of Hubble Space Telescope ACS/SBC data has shown that background levels can vary considerably between observations, with most filters showing over an order of magnitude variation. For the shorter-wavelength filters, the background is understood to be dominated by airglow; however, what precisely drives background variations is ... Read full story

21:48 <Curie> arXiv.org | Using 23 Years of ACS/SBC Data to Understand Backgrounds: Significant Reductions in Expected Background Levels 21h ago · 3 min read We have used 23 years of Hubble Space Telescope ACS/SBC data to study what background levels are encountered in practice and how much they vary. The backgrounds vary considerably, with F115LP, F122M, F125LP, PR110L, and PR130L all showing over an order of magnitude of variation in background between observations, apparently due to changes in airglow. The ... Read full story

21:48 <Curie> arXiv.org | The formation of merging black holes via stable mass transfer in massive binary stars 21h ago · 4 min read The vast majority of massive binary systems in the universe is evidently unsuited to produce merging binary black holes. However, several narrow evolutionary paths of isolated massive binaries towards this goal have recently been identified. Due to the high degree of simplification and assumptions applied in previous modelling of these paths, conclusions ... Read full story

21:53 <Curie> arXiv.org | Constraining Dark Acoustic Oscillations with the High-Redshift UV Luminosity Function 21h ago · 3 min read Dark acoustic oscillations (DAOs) in the matter power spectrum can arise in many different dark sector models, and can imprint on a variety of cosmological observables. In this work we use measurements of the galactic UV luminosity function (UVLF) at high redshifts to constrain the dark acoustic oscillation feature at small scales in a model-agnostic way.... Read full story

21:53 <Curie> arXiv.org | Jittering jets in stripped-envelope core-collapse supernovae 21h ago · 3 min read We compare the expected explosion time of core-collapse supernovae (CCSNe) in the jittering jets explosion mechanism (JJEM) to that in the neutrino-driven (the delayed neutrino) mechanism, and conclude that for most, but not all, stellar models, even when the neutrino-driven mechanism might have led to an explosion, the JJEM starts to operate before the n... Read full story

21:53 <Curie> arXiv.org | Barycenter kinematics in Local Group analogues I. A. L\'opez-Paredes, J. E. Forero-Romero · 21h ago · 3 min read We investigate a new way to identify systems similar to our Local Group (LG) of galaxies in cosmological simulations. We use as an additional constraint the velocity of the LG barycenter, which is measured accurately from cosmic microwave background data. Using different cosmological simulations we compare pairs selected with this constraint to pairs sele... Read full story

21:53 <Curie> arXiv.org | Multi-phase investigation of outflows in the circumgalactic and interstellar media of luminous quasars at z~5 21h ago · 3 min read Aims. Outflows from active galactic nuclei are invoked as the principal feedback process regulating the co-evolution of supermassive black holes and their host galaxies. Because of their multi-phase and multi-scale nature, an exhaustive description of these winds should exploit multiple tracers. However, connecting various outflow features remains a chall... Read full story

21:53 <Curie> arXiv.org | Axion String Source Modelling Amelia Drew, Tomasz Kinowski, E. P. S. Shellard · 21h ago · 3 min read In this paper, we investigate the effect of the string radius of curvature $R_\mathrm{\,Gaussian}$ on the massive and massless scalar radiation emitted from collisions of travelling waves propagating along an axion (global cosmic) string. We construct initial conditions for two colliding Gaussians and perform parameter scans over their amplitude $A$ and s... Read full story

21:53 <Curie> arXiv.org | From Axion Detection to Dark Matter Astronomy Jae Hyeok Chang, Stefano Profumo · 21h ago · 2 min read A global haloscope network could turn an axion discovery into astronomy of dark matter substructure and transients. We combine interferometric phase, spatial coherence, and spectroscopy to study the formation and evolution of axion substructure through measurements of flow directions and velocity distributions. For tidal streams, a four-site forecast show... Read full story

21:53 <Curie> arXiv.org | Modified hydrogen recombination rate due to non-Hubble redshift effects I. V Krasnov, N. S. Nedelko · 21h ago · 3 min read The accumulation of observational data in recent years has led to a peculiar situation in which measurements of the cosmological parameters made by various collaborations and using different methods yield significantly different values. A solution to this problem may be found by modifying the models used to obtain these values. In this work, we revisit th... Read full story

21:53 <Curie> arXiv.org | Breakdown of hydrodynamic universality in causal first-order viscous neutron star oscillations Lennox S. Keeble, Alejandro C\'ardenas-Avenda\~no · 21h ago · 3 min read Hydrodynamic modeling of viscous neutron stars requires a choice of theory of relativistic hydrodynamics. That distinct formulations contain the same physical content in the long-wavelength limit is referred to as ``hydrodynamic universality.'' It has been recently shown that hydrodynamic universality can break down in radial neutron star oscillations: ca... Read full story

21:53 <Curie> arXiv.org | From Non-Thermal to Thermal: Cosmological Imprints of Self-Interacting Secluded Dark Matter Koushik Dutta, Deep Ghosh, Ahamadullah Khan · 21h ago · 3 min read Dark matter (DM), secluded from the Standard Model (SM), can attain internal thermalization through self-interactions. We investigate the thermalization of a real scalar DM field with a quartic self-coupling, initially produced from the perturbative decay of the coherently oscillating inflaton field during reheating. The thermalization process has been st... Read full story

21:53 <Curie> arXiv.org | From Cosmic Bounces to Primordial Black Holes: The Role of Primordial Magnetic Fields Ajeet Singhal, Shreya Banerjee · 21h ago · 3 min read We investigate primordial black hole (PBH) formation from primordial magnetic fields generated during a non-singular ekpyrotic bounce. A time-dependent coupling between the electromagnetic field and a scalar background breaks conformal invariance and amplifies gauge field fluctuations during contraction, generating magnetic fields whose anisotropic stress... Read full story

21:54 <Curie> arXiv.org | Numerical simulations of low-mass black hole-neutron star mergers with moderate eccentricities Ivan Markin, Gonzalo Morr\'as, Tim Dietrich · 21h ago · 3 min read A confident detection of orbital eccentricity in gravitational-wave signals from black hole-neutron star systems would be a strong indicator of their dynamical formation origin. While eccentric waveform models have recently been developed, their validity for analyzing black hole--neutron star signals has yet to be tested against numerical-relativity simul... Read full story

21:54 <Curie> arXiv.org | Displacement-noise-free gravitational-wave detector using quantum tomography of photon orbital angular momentum states Haorong Wu, Xilong Fan, Lixiang Chen · 21h ago · 3 min read Gravitational waves (GWs) induce quantum transitions between photon orbital-angular-momentum (OAM) states with amplitudes $α_{\pm}$. Exploiting this effect, we present a displacement-noise-free detection framework that extracts GW information from the OAM Hilbert space. Parametrized quantum state tomography of the GW-induced OAM sidebands enables a single... Read full story

21:54 <Curie> arXiv.org | Testing the inelastic dark matter interpretation of the LZ event with heavy-element experiments 21h ago · 3 min read We consider the inelastic dark matter interpretation of the recent 248 keV event observed by LZ and identify different experiments that could test it. Details of the underlying model and the ability of complementary experiments to test it depend significantly on the high-velocity tail of the dark matter distribution. We consider several example velocity d... Read full story

21:54 <Curie> arXiv.org | Optimal Strategies for Gravitational-Wave Memory Detection with Noise Marginalization in Pulsar Timing Arrays Rand Burnette, Xavier Siemens · 21h ago · 3 min read Current pulsar timing arrays could detect gravitational wave memory, which would provide a unique test of general relativity. In order to optimize our searches for gravitational wave memory in pulsar timing arrays, we integrate the optimal frequentist statistics for GW memory into the \texttt{enterprise} code suite. We additionally test a noise marginaliz... Read full story

21:54 <Curie> arXiv.org | Leptogenesis with a GeV-Scale Quasi-Dirac Neutrino 21h ago · 3 min read We discuss leptogenesis in a model with a GeV-scale quasi-Dirac neutral lepton, comprising mainly sterile states, which is accessible to future experiments. In particular, we show that Higgs-decay leptogenesis can naturally arise from the type-I seesaw mechanism with spontaneously broken global lepton number together with a discrete $Z_2$ symmetry, yieldi... Read full story

21:54 <Curie> arXiv.org | Coherent states of neutrinos in rotating matter Alexander Breev, Maxim Dvornikov · 21h ago · 3 min read We study coherent states of neutrinos electroweakly interacting with rotating matter. We start with the Dirac equation for a massive neutrino propagating in background matter with a coordinate dependent effective potential. Then, we consider the limit of massless particles and the specific matter velocity profile. It allows us to reduce the neutrino Hamil... Read full story

21:54 <Curie> arXiv.org | The Forgetful Black Hole: Memory Burden and Hysteresis in Hawking Evaporation Yen Chin Ong · 21h ago · 3 min read The memory-burden scenario of black hole evaporation proposes that Hawking emission may become increasingly suppressed as maintaining stored quantum information becomes dynamically costly. In this work, we revisit this scenario and investigate the conditions under which information retention can produce a genuine dynamical burden. We derive general scalin... Read full story

21:54 <Curie> arXiv.org | Breaking de Sitter Symmetry with Cosmic Topology: Cosmological Role of Infrared Vacuum Freedom 21h ago · 3 min read When spatial sections of spacetime are topologically nontrivial, the symmetry arguments usually used to choose the Bunch-Davies vacuum are no longer guaranteed to apply. We study this problem for a scalar field on de Sitter spacetime with toroidal spatial sections. The Hadamard conditions, which ensure the same short-distance structure as in flat space, a... Read full story

21:54 <Curie> arXiv.org | LSST and Keck characterization of outer Main Belt comet P/2026 N2 21h ago · 3 min read We characterize comet P/2026 N2, whose outer Main Belt orbit has $a=3.07$ au, $e=0.21$, and $i=2.25^\circ$, using optical observations, archival imaging, and dynamical integrations. Observations from the Legacy Survey of Space and Time (LSST) at NSF-DOE Vera C. Rubin Observatory in 2026 June-July and Keck/LRIS imaging on October 7 show active morphology a... Read full story

21:54 <Curie> arXiv.org | Singles in Disguise: Kepler's Low-SNR Single-Transiting Systems as Incompletely Detected Multis 21h ago · 3 min read NASA's Kepler mission found more systems with one transiting planet (``singles'') than expected from those with several (``multis''). This excess was first taken as evidence for a Kepler dichotomy -- a second population of intrinsically single or highly inclined systems -- but later work argued that selection effects acting on a single population can repr... Read full story

22:39 <Quasar> Space | 'It really does change you': SpaceX Crew-12 commander wishes we could all see our fragile Earth from space Mike Wall · 39m ago · 4 min read "It's not only so beautiful, but it's so precious. " Read full story

#science am 2026-10-16