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c65f3bb8fa10132a9b647d4783d6fa917cbf9dc696c296cbe41b202108ae7040 | 2026-01-21T00:00:00-05:00 | An upper limit on cosmological chiral gravitational wave background | arXiv:2601.13532v1 Announce Type: cross Abstract: Within the standard framework in which electroweak sphaleron processes relate lepton and baryon number, we derive an upper limit on the amplitude of a chiral gravitational wave background produced prior to the electroweak epoch. This bound is independent of the producti... | https://arxiv.org/abs/2601.13532 | Academic Papers | svg |
060a457967eb62776d57c16ac2c32578bd13b37921b7dfaacf85988c7dd46209 | 2026-01-21T00:00:00-05:00 | Cosmological Budget of Entropy from Merging Black Holes | arXiv:2601.13621v1 Announce Type: cross Abstract: Black holes contain more entropy than any other component of the observable universe. Gravitational-wave observations from LIGO and Virgo have shown evidence of a previously unknown black hole mass range, which provides new information to update the entropy budget. Incr... | https://arxiv.org/abs/2601.13621 | Academic Papers | svg |
5a4174af22e733aaaf6f21e80385f52da9f52736910d9b1acf26c058c73a223f | 2026-01-21T00:00:00-05:00 | RNLE: Residual neural likelihood estimation and its application to gravitational-wave astronomy | arXiv:2601.13857v1 Announce Type: cross Abstract: Simulation-based inference provides a powerful framework for Bayesian inference when the likelihood is analytically intractable or computationally prohibitive. By leveraging machine-learning techniques and neural density estimators, it enables flexible likelihood or pos... | https://arxiv.org/abs/2601.13857 | Academic Papers | svg |
3483cc179314aaed28392786216622793619d49e03890121899fac4a1a8a541a | 2026-01-21T00:00:00-05:00 | Influence of Finite-Nuclei Constraints on High-Density Transitions and Neutron Star Properties | arXiv:2601.14194v1 Announce Type: cross Abstract: We construct posterior distributions of the equation of state (EoS) for matter beyond the inner crust of neutron stars by incorporating finite nuclei (FN) constraints within relativistic mean field models. These constraints are implemented in three complementary ways: (... | https://arxiv.org/abs/2601.14194 | Academic Papers | svg |
7763f7f0bec82d6cc820d23419b13cdebcd3ad21896bb7c691e6c86e23c770b7 | 2026-01-21T00:00:00-05:00 | The Cosmic Expansion History from Line-Intensity Mapping | arXiv:1907.10065v2 Announce Type: replace Abstract: Line-intensity mapping (LIM) of emission from star-forming galaxies can be used to measure the baryon acoustic oscillation (BAO) scale as far back as the epoch of reionization. This provides a standard cosmic ruler to constrain the expansion rate of the Universe at re... | https://arxiv.org/abs/1907.10065 | Academic Papers | svg |
bf7b31628791a83d1c3693e3441437e1baeae0284f66e1acfa7c0a51498ef449 | 2026-01-21T00:00:00-05:00 | A User's Guide to Extracting Cosmological Information from Line-Intensity Maps | arXiv:1907.10067v2 Announce Type: replace Abstract: Line-intensity mapping (LIM) provides a promising way to probe cosmology, reionization and galaxy evolution. However, its sensitivity to cosmology and astrophysics at the same time is also a nuisance. Here we develop a comprehensive framework for modelling the LIM pow... | https://arxiv.org/abs/1907.10067 | Academic Papers | svg |
68f2c3e51006428af240ce1217db101482014e0da45804005f2b029f68c1f7c7 | 2026-01-21T00:00:00-05:00 | JEM-EUSO Collaboration contributions to the 37th International Cosmic Ray Conference | arXiv:2201.12246v2 Announce Type: replace Abstract: Compilation of papers presented by the JEM-EUSO Collaboration at the 37th International Cosmic Ray Conference (ICRC), held on July 12-23, 2021 (online) in Berlin, Germany. | https://arxiv.org/abs/2201.12246 | Academic Papers | svg |
3b8eba033d1791b39c39a253f2c8b6b248de5ec7e41ee5cfb42dc5059e132c6b | 2026-01-21T00:00:00-05:00 | JEM-EUSO Collaboration contributions to the 38th International Cosmic Ray Conference | arXiv:2312.08204v2 Announce Type: replace Abstract: This is a collection of papers presented by the JEM-EUSO Collaboration at the 38th International Cosmic Ray Conference (Nagoya, Japan, July 26-August 3, 2023) | https://arxiv.org/abs/2312.08204 | Academic Papers | svg |
425603f91a210cdfa285a2d22b6350316848b28b853cbeeb354a6ec1d7089982 | 2026-01-21T00:00:00-05:00 | JADES: Rest-frame UV-to-NIR Size Evolution of Massive Quiescent Galaxies from Redshift z=5 to z=0.5 | arXiv:2401.00934v2 Announce Type: replace Abstract: We present the UV-to-NIR size evolution of a sample of 161 quiescent galaxies (QGs) with $M_*>10^{10}M_\odot$ over $0.510^{10.6}M_\odot$. To constrain the physical mechanisms driving the apparent size evolution, we study the relationship between $R_e$ and the formatio... | https://arxiv.org/abs/2401.00934 | Academic Papers | svg |
895dd690b8817cb61908b01f236c5a21a44638b2cd932ea6af2ca23ec6fd47f5 | 2026-01-21T00:00:00-05:00 | On the importance of geometry in exoplanet irradiation : Implications for the day-night contrast | arXiv:2406.15021v2 Announce Type: replace Abstract: The irradiance received by a spherical body or a planet close to a spherically symmetric source does not follow the point-sized source approximation and the inverse-square variation of irradiation if spherical symmetry is broken. In the penumbral zones of the planet, ... | https://arxiv.org/abs/2406.15021 | Academic Papers | svg |
7fce98ffa2c4848b23e9f7b2ac8050a969b99ac5b78526e9225966e898b9d7ee | 2026-01-21T00:00:00-05:00 | Cosmoglobe DR2. III. Improved modelling of zodiacal light with COBE-DIRBE through global Bayesian analysis | arXiv:2408.11004v2 Announce Type: replace Abstract: We present an improved zodiacal light (ZL) model for COBE-DIRBE derived through global Bayesian analysis within the Cosmoglobe Data Release 2 framework. The parametric form of the ZL model is inspired by the original DIRBE model by Kelsall et al. (K98), but the specif... | https://arxiv.org/abs/2408.11004 | Academic Papers | svg |
dc1b5db0155f4621142499682d7b4c998078628d2a5f5ac7c256e3230bb5a8c6 | 2026-01-21T00:00:00-05:00 | The compact object of HESS J1731-347 and its implication on neutron star matter | arXiv:2408.15220v2 Announce Type: replace Abstract: In this work, we investigate the impact of the possibility of a small, subsolar mass compact star, such as the recently reported central compact object of HESS J1731-347, on the equation of state (EOS) of neutron stars. We have used a hybrid approach to the nuclear EO... | https://arxiv.org/abs/2408.15220 | Academic Papers | svg |
4bf42206115a6bc89ca73c515cda9a0a44748e43fe05152dbfedc46ae7f33ee2 | 2026-01-21T00:00:00-05:00 | Halo Spin Depends on The Distance to Large-scale Filament | arXiv:2411.11443v2 Announce Type: replace Abstract: We employ a semi-analytical methodology to estimate the dark matter halo spin of HI gas-rich galaxies in the Arecibo Legacy Fast Alfa Survey and investigate the relationship between halo spin and the proximity of galaxies to large-scale filaments. We exclude galaxies ... | https://arxiv.org/abs/2411.11443 | Academic Papers | svg |
eaaef3051b1614504d368f5979eb31ee74135c45bd3bb600fd3af4eb05cf1ad0 | 2026-01-21T00:00:00-05:00 | The non-linear dynamics of axion inflation: a detailed lattice study | arXiv:2411.16368v2 Announce Type: replace Abstract: We study in detail the fully inhomogeneous non-linear dynamics of axion inflation, identifying three regimes: weak-, mild-, and strong-backreaction, depending on the duration of inflation. We use lattice techniques that explicitly preserve gauge invariance and shift s... | https://arxiv.org/abs/2411.16368 | Academic Papers | svg |
ae38e64f2918436f7b36bc4b6dc030e5eb68abcd46030f40464833ed87322c79 | 2026-01-21T00:00:00-05:00 | Bumblebee cosmology: Tests using distance- and time-redshift probes | arXiv:2411.18559v3 Announce Type: replace Abstract: In modern cosmology, the discovery of the universe's accelerated expansion has significantly transformed our understanding of cosmic evolution and expansion history. The unknown properties of dark energy, the driver of this acceleration, have not only prompted extensi... | https://arxiv.org/abs/2411.18559 | Academic Papers | svg |
c3d16c74eed82efc8aebfe68e6a0d14a0dbbabec0ffb18209028a228e4ebf049 | 2026-01-21T00:00:00-05:00 | Searching for New Physics in Ultradense Environment: a Review on Dark Matter Admixed Neutron Stars | arXiv:2412.09381v3 Announce Type: replace Abstract: Neutron Stars (NSs), among the densest objects in the Universe, are exceptional laboratories for investigating Dark Matter (DM) properties. Recent theoretical and observational developments have heightened interest in exploring the impact of DM on NS structure, giving... | https://arxiv.org/abs/2412.09381 | Academic Papers | svg |
8119e62d54aa17b58fce1dddf187e35b9c49e8f37e4eaa4364a9a552d999fd69 | 2026-01-21T00:00:00-05:00 | Revisiting the Galactic Winds in M82 I: the recent starburst and launch of outflow in simulations | arXiv:2412.09452v4 Announce Type: replace Abstract: We revisit the launch of the galactic outflow in M82 using hydrodynamic simulations. Employing a sink-particle module, we self-consistently resolve star formation and feedback, avoiding reliance on simplified models. We investigate the effects of stellar feedback mech... | https://arxiv.org/abs/2412.09452 | Academic Papers | svg |
1d23d8fd25d36699710939774723ae960e7c2974fb422b1aeea19083df2783b9 | 2026-01-21T00:00:00-05:00 | Angular bispectrum of matter number counts in cosmic structures | arXiv:2501.05422v3 Announce Type: replace Abstract: The bispectrum of galaxy number counts is a key probe of large-scale structure, offering insights into the initial conditions of the Universe, the nature of gravity, and cosmological parameters. In this work, we present the first full-sky computation of the angular bi... | https://arxiv.org/abs/2501.05422 | Academic Papers | svg |
60a724ab52bd2527079237daf15966b2e9e06112c6610be400f0ead0cda95b62 | 2026-01-21T00:00:00-05:00 | Impact of multi-messenger spectral modelling on blazar-neutrino associations | arXiv:2503.04632v2 Announce Type: replace Abstract: Blazars are interesting source candidates for astrophysical neutrino emission. Multi-messenger lepto-hadronic models based on proton-photon (p-gamma) interactions result in predictions for the neutrino spectra (''p-gamma spectra'') which are typically strongly peaked ... | https://arxiv.org/abs/2503.04632 | Academic Papers | svg |
0a11f7f60b70380cef83c0d3ca74b175bf76ce56b6c0df35875fb6c51f101bb9 | 2026-01-21T00:00:00-05:00 | Galaxies in the Epoch of Reionization Are All Bark and No Bite -- Plenty of Ionizing Photons, Low Escape Fractions | arXiv:2505.08870v2 Announce Type: replace Abstract: Early results from JWST suggest that epoch-of-reionization (EoR) galaxies produce copious ionizing photons, which, if they escape efficiently, could cause reionization to occur too early. We study this problem using \jwst\ imaging and prism spectroscopy for 412 galaxi... | https://arxiv.org/abs/2505.08870 | Academic Papers | svg |
e0bf6ba598f3bbc6fc1c6eff649dfe062e45472e801cfd044aa505028895ac95 | 2026-01-21T00:00:00-05:00 | A black hole in a near-pristine galaxy 700 million years after the Big Bang | arXiv:2505.22567v5 Announce Type: replace Abstract: The recent discovery of a large number of massive black holes within the first two billion years after the Big Bang, as well as their peculiar properties, have been largely unexpected based on the extrapolation of the properties of luminous quasars. These findings hav... | https://arxiv.org/abs/2505.22567 | Academic Papers | svg |
bb698aa24febc725cf557335d887da003e338ab73f2443fc76e4539c27d65986 | 2026-01-21T00:00:00-05:00 | Shape Shifting Light Dark Matter Solitons | arXiv:2506.01282v2 Announce Type: replace Abstract: Dark matter consisting of a Bose--Einstein condensate (BEC) of ultra-light particles is predicted to have a soliton shape that shifts with the dark matter mass fraction in galaxies containing a centrally localized point mass (or black hole), consistent with previous n... | https://arxiv.org/abs/2506.01282 | Academic Papers | svg |
1f0be5905d8f1520f7b8890f28aaa50c112523bd84f7ea57212a01bc8c1e4c61 | 2026-01-21T00:00:00-05:00 | Distinguishing Orbiting and Infalling Dark Matter Particles with Machine Learning | arXiv:2506.09146v2 Announce Type: replace Abstract: Dark matter halos are typically defined as spheres that enclose some overdensity, but these sharp, somewhat arbitrary boundaries introduce non-physical artifacts such as backsplash halos, pseudo-evolution, and an incomplete accounting of halo mass. A more physically m... | https://arxiv.org/abs/2506.09146 | Academic Papers | svg |
b4a26716caed338ff5ff1826af4664738148423c5fdab9e7a66506bf935e7698 | 2026-01-21T00:00:00-05:00 | Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection | arXiv:2506.14041v2 Announce Type: replace Abstract: Primordial black holes (PBHs) arise from the collapse of density perturbations in the early universe and serve as a dark matter (DM) candidate and a probe of fundamental physics. There remains an unconstrained ``asteroid-mass'' window where PBHs of masses $10^{17} {\r... | https://arxiv.org/abs/2506.14041 | Academic Papers | svg |
eec78bbfc9372a10f7463cbd18cca57b623d61ae26ef407e77e6933027a25690 | 2026-01-21T00:00:00-05:00 | Euclid: An emulator for baryonic effects on the matter bispectrum | arXiv:2506.18974v2 Announce Type: replace Abstract: Understanding the impact of baryonic processes such as star formation and active galactic nuclei (AGN) feedback on matter clustering is crucial to ensure precise and unbiased cosmological inference. Most theoretical models of baryonic effects to date focus on two-poin... | https://arxiv.org/abs/2506.18974 | Academic Papers | svg |
a3541b2dad4fadc5d179267a7047ee77e324f2c88a5bd18109710a6ca8970bdc | 2026-01-21T00:00:00-05:00 | An Accretion Flare Interpretation for the Ultra-High-Energy Neutrino Event KM3-230213A | arXiv:2506.21111v2 Announce Type: replace Abstract: We study the origin of the ultra-high-energy (UHE) neutrino event KM3-230213A detected by KM3NeT, focusing on MRC 0614-083 which has been pinpointed as the closest blazar to the neutrino localization exhibiting variable multi-wavelength emission. A joint interpretatio... | https://arxiv.org/abs/2506.21111 | Academic Papers | svg |
a728bd9c5f227655236eecff5ae8366f467a652ce249e5199344f4820a85f361 | 2026-01-21T00:00:00-05:00 | REBELS-MOSFIRE: Weak CIII] Emission is Typical Among Extremely UV-bright, Massive Galaxies at $z\sim7$ | arXiv:2506.21674v2 Announce Type: replace Abstract: We present Keck/MOSFIRE H-band spectroscopic measurements covering the [CIII]1907, CIII]1909 doublet for a sample of 8 z~7 spectroscopically-confirmed star-forming galaxies drawn from the Reionization Era Bright Emission Line Survey (REBELS). This REBELS-MOSFIRE sampl... | https://arxiv.org/abs/2506.21674 | Academic Papers | svg |
b05999d6cdec1ee3b13ca80584804c7bb448683c323b5fe3634ee50df3f77090 | 2026-01-21T00:00:00-05:00 | Multimessenger Emission from Very-High-Energy Black Hole-Jet Systems in the Milky Way | arXiv:2506.22550v2 Announce Type: replace Abstract: Microquasars, compact binary systems with an accreting stellar-mass black hole or neutron star, are promising candidates for high-energy particle acceleration. Recently, the LHAASO collaboration reported on the detection of $>100$ TeV $\gamma$-ray emission from five m... | https://arxiv.org/abs/2506.22550 | Academic Papers | svg |
759a56c3997707470edb7094633a7498bc8fd8379f07190f366d345a940a7d88 | 2026-01-21T00:00:00-05:00 | The diffuse supernova neutrino background: an update with modern population synthesis and core-collapse simulations | arXiv:2506.22699v2 Announce Type: replace Abstract: We present a new, state-of-the-art computation of the Diffuse Supernova Neutrino Background (DSNB), where we use neutrino spectra from multi-dimensional, multi-second core collapse supernova simulations - including both neutron-star and black-hole forming collapses - ... | https://arxiv.org/abs/2506.22699 | Academic Papers | svg |
cc93ac53a48847a91c9a91dee45ed3b2bdfcff2db3454f36eb0794f0e0135d8d | 2026-01-21T00:00:00-05:00 | Gravitational lensing rarely produces high-mass outliers to the compact binary population | arXiv:2507.07964v2 Announce Type: replace Abstract: All gravitational-wave signals are inevitably gravitationally lensed by intervening matter as they propagate through the Universe. When a gravitational-wave signal is magnified, it \emph{appears} to have originated from a closer, more massive system. Thus, high-mass o... | https://arxiv.org/abs/2507.07964 | Academic Papers | svg |
3d99d0129fc277e8b2ba4492b7a8d2b378f0cd9eb1aec1910b2c7856cc1f71b1 | 2026-01-21T00:00:00-05:00 | MIRACLE II: Unveiling the multi-phase gas interplay in the circumnuclear region of NGC 1365 via multi-cloud modeling | arXiv:2507.08077v4 Announce Type: replace Abstract: We present a multi-phase study of the gas in the circumnuclear region (~1.1x1.0 kpc^2) of the nearby Seyfert 1.8 galaxy NGC 1365, observed in the context of the Mid-IR Activity of Circumnuclear Line Emission (MIRACLE) program. We combined spatially resolved spectrosco... | https://arxiv.org/abs/2507.08077 | Academic Papers | svg |
52cb800b17f3dfe411ea389512cf39d1244c4d954242f4fa10472f909b45c97c | 2026-01-21T00:00:00-05:00 | Simulation-based inference with deep ensembles: Evaluating calibration uncertainty and detecting model misspecification | arXiv:2507.13495v2 Announce Type: replace Abstract: Simulation-Based Inference (SBI) offers a principled and flexible framework for conducting Bayesian inference in any situation where forward simulations are feasible. However, validating the accuracy and reliability of the inferred posteriors remains a persistent chal... | https://arxiv.org/abs/2507.13495 | Academic Papers | svg |
8e018948b91b598d5947cb66e681df815422b0efa3bb48f4d648a86e5fe93cd3 | 2026-01-21T00:00:00-05:00 | Optical and near-infrared nebular-phase spectroscopy of SN 2024ggi: constraints on the structure of the inner ejecta, progenitor mass, and dust | arXiv:2508.02656v3 Announce Type: replace Abstract: We present optical and near-infrared (NIR) spectroscopic observations of the nearby Type II supernova SN\,2024ggi from 250 and 581 days after the explosion. Comparing the evolution of the [\ion{O}{1}] at 6300, 6363 \text{\AA} doublet normalized to the continuum with s... | https://arxiv.org/abs/2508.02656 | Academic Papers | svg |
04bb50a8e427a846e8c0a537dbc38fc2c14fd4c6953972f13174228dab27e97b | 2026-01-21T00:00:00-05:00 | On frequentist confidence intervals in a non-Gaussian regime | arXiv:2508.10633v2 Announce Type: replace Abstract: We study frequentist confidence intervals based on graphical profile likelihoods (Wilks' theorem, likelihood integration), and the Feldman-Cousins (FC) prescription, a generalisation of the Neyman belt construction, in a setting with non-Gaussian Markov chain Monte Ca... | https://arxiv.org/abs/2508.10633 | Academic Papers | svg |
ab03674152d758b2471a2eee233966fbc11c9a35109c848677fb6c24a10ca4ae | 2026-01-21T00:00:00-05:00 | Three-Dimensional Numerical Simulations of Magnetar Crust Quakes | arXiv:2508.12567v2 Announce Type: replace Abstract: Crust quakes are frequently invoked as a mechanism to trigger sudden transients in the magnetospheres of magnetars. In this picture, a mechanical failure of the crust excites seismic motions of the magnetar surface that launch force-free waves into the magnetosphere. ... | https://arxiv.org/abs/2508.12567 | Academic Papers | svg |
7ec1e64501b0f907e7586d7ed81a5202a34be413e92d0181de29e1b54160329c | 2026-01-21T00:00:00-05:00 | SISSI: Supernovae in a stratified, shearing interstellar medium. II. Star formation near the Sun is quenched by expansion of the Local Bubble | arXiv:2509.04221v2 Announce Type: replace Abstract: The age of the Local Bubble (LB) constrains the timescale on which the interstellar medium in the solar neighborhood evolves. Previous estimates placed the age of the LB at \sim 14 Myr, and attributed its expansion to \sim 15-20 supernovae (SNe), yet a companion paper... | https://arxiv.org/abs/2509.04221 | Academic Papers | svg |
56e61c7d71134fda5e2a15111a946043012312da07785cc62458495fde92d21d | 2026-01-21T00:00:00-05:00 | A multiwavelength study of the new Galactic center black hole candidate MAXI J1744-294 | arXiv:2509.14465v2 Announce Type: replace Abstract: For the first time in nearly a decade, a bright new transient was detected in the central parsec (pc) of the Galaxy. MAXI J1744-294 was never observed in outburst prior to January 2025. We present the results of a broadband, multi-wavelength study of MAXI J1744-294, i... | https://arxiv.org/abs/2509.14465 | Academic Papers | svg |
09fc1adab6ed3abf1c0bb825a6d62bde3ef007b9785b8d9437870d9998c46005 | 2026-01-21T00:00:00-05:00 | A HyperFlash and \'ECLAT view of the local environment and energetics of the repeating FRB 20240619D | arXiv:2509.16374v2 Announce Type: replace Abstract: Time-variable propagation effects provide a window into the local plasma environments of repeating fast radio burst (FRB) sources. Here we report high-cadence observations of FRB 20240619D, as part of the HyperFlash and \'ECLAT programs. We observed for $500$h and det... | https://arxiv.org/abs/2509.16374 | Academic Papers | svg |
8dec0c655f0e3a9b1de8f72bc4823e081b881f0fb5cbde820699209b58f1dd8e | 2026-01-21T00:00:00-05:00 | Light curves of time-dependent accretion disk in tidal disruption events | arXiv:2509.16544v3 Announce Type: replace Abstract: Tidal disruption events (TDEs) are believed to be an ideal laboratory for studying the evolution of accretion flow around a supermassive black hole (BH). In general, the mass feeding rate to the BH is suggested to be super-Eddington initially, and evolves to be sub-Ed... | https://arxiv.org/abs/2509.16544 | Academic Papers | svg |
5f5924707d53779a3d5d222785a7fc6dc7beceb9a470c6e6e89347a52c740d80 | 2026-01-21T00:00:00-05:00 | The impact of cosmic filaments on the abundance of satellite galaxies | arXiv:2509.22179v2 Announce Type: replace Abstract: The impact of cosmic web environments on galaxy properties plays a critical role in understanding galaxy formation. Using the state-of-the-art cosmological simulation IllustrisTNG, we investigate how satellite galaxy abundance differs between filaments and the field, ... | https://arxiv.org/abs/2509.22179 | Academic Papers | svg |
b3965b4190f46a24c65121919f9abcf8215b6e529b80df61180c16de3fd39548 | 2026-01-21T00:00:00-05:00 | BAO miscalibration cannot rescue late-time solutions to the Hubble tension | arXiv:2510.01974v2 Announce Type: replace Abstract: Baryon Acoustic Oscillation (BAO) measurements play a key role in ruling out post-recombination solutions to the Hubble tension. However, because the data compression leading to these measurements assumes a fiducial $\Lambda$CDM cosmology, their reliability in testing... | https://arxiv.org/abs/2510.01974 | Academic Papers | svg |
a1eefcdf37e7fb57a784458cddb99cbcbf432c5180f705d236763d45a1ea00ae | 2026-01-21T00:00:00-05:00 | Improved Radiative Transfer Corrections in Helium Emission Lines | arXiv:2510.02045v2 Announce Type: replace Abstract: We present a new detailed model of the He I collisional-recombination spectrum based on the most up-to-date atomic data. The model accounts for radiative transfer effects and the influence of a non-zero optical depth in He I lines arising from transitions to the metas... | https://arxiv.org/abs/2510.02045 | Academic Papers | svg |
0d23e6d44d4d0ac8c3a53411a74be2477263ce3950b8610c55795723be36d676 | 2026-01-21T00:00:00-05:00 | Vision-Based CNN Prediction of Sunspot Numbers from SDO/HMI Images | arXiv:2510.03473v2 Announce Type: replace Abstract: Sunspot numbers provide the longest continuous record of solar activity and remain a key index for heliophysical research and space-weather applications. Standard sunspot determination relies on visual inspection and algorithmic feature-detection pipelines, both of wh... | https://arxiv.org/abs/2510.03473 | Academic Papers | svg |
5a4161d2054ab63ffa67edb955a58adb708abeaf2dce392c05150905ffe3fea8 | 2026-01-21T00:00:00-05:00 | Is the high-energy environment of K2-18b special? | arXiv:2510.06939v2 Announce Type: replace Abstract: K2-18b lies near the radius valley that separates super-Earths and sub-Neptunes, marking a key transitional regime in planetary and atmospheric composition. The system offers a valuable opportunity to study how M-dwarf high-energy stellar radiation influences atmosphe... | https://arxiv.org/abs/2510.06939 | Academic Papers | svg |
081f86768d55c38834f6b30f69ae4a9ec7ef2d6cd616d0a7016838e6676456e5 | 2026-01-21T00:00:00-05:00 | Cavendish experiment with fast radio bursts on cosmological scales | arXiv:2510.11022v2 Announce Type: replace Abstract: A key measure of gravity is the relation between the Weyl potential $\Psi+\Phi$ and the matter overdensity $\delta_m$, encapsulated as an effective gravitational constant $G_{\rm light}$ for light motion. Its value, along with possible spatial and temporal variations,... | https://arxiv.org/abs/2510.11022 | Academic Papers | svg |
e6639ad189753eb0230237294ecbfc65e68842e867d6f475eec2c854e282f217 | 2026-01-21T00:00:00-05:00 | Strong Evidence for Cosmic Ray-Supported $\sim$L$^{\ast}$ Galaxy Halos via X-ray \& tSZ Constraints | arXiv:2510.13959v2 Announce Type: replace Abstract: Many state-of-the-art galaxy simulations featuring traditional feedback modes have significant challenges producing enough extended soft X-ray ($\sim 0.5-2$ keV) emission at R $\sim 0.5-1$ R$_{\rm vir}$ observed around galaxies with stellar masses M$_{\rm \ast} \lesss... | https://arxiv.org/abs/2510.13959 | Academic Papers | svg |
3bf6044b828f56934f8a4fdccf7fac4b821e5fa7b72ed9cce067a66c3a8eec44 | 2026-01-21T00:00:00-05:00 | The selection function of the Gaia DR3 open cluster census | arXiv:2510.18343v2 Announce Type: replace Abstract: Open clusters are among the most useful and widespread tracers of Galactic structure. The completeness of the Galactic open cluster census, however, remains poorly understood. For the first time ever, we establish the selection function of an entire open cluster censu... | https://arxiv.org/abs/2510.18343 | Academic Papers | svg |
cade603aeceaa17f7b4acc2ec2591d095ac52a5a5205a625e058dfe715b95992 | 2026-01-21T00:00:00-05:00 | Binding energy of compact stars and their non-radial oscillations | arXiv:2510.18706v2 Announce Type: replace Abstract: In the past years, a significant effort has been made with the scope of determining correlations, involving compact star properties, that are independent of the nuclear equation of state. Such universal relations are of utmost importance as they allow for the impositi... | https://arxiv.org/abs/2510.18706 | Academic Papers | svg |
8150f354eaa0628defb65442d3765dd8dd692c1eb710455520683e79d39cfa0e | 2026-01-21T00:00:00-05:00 | Galactic bars and active galactic nucleus fuelling in the second half of cosmic history | arXiv:2510.23522v2 Announce Type: replace Abstract: We investigate the role of galactic bars in fuelling and triggering Active Galactic Nucleus (AGN) in disc galaxies up to $z\sim 0.8$. We utilise a Deep Learning model, fine-tuned on Galaxy Zoo volunteer classifications, to identify (strongly and weakly) barred and unb... | https://arxiv.org/abs/2510.23522 | Academic Papers | svg |
f16c1bdc97773c577e4e4df171e41972079f604f71e17c1572752de611a5c10f | 2026-01-21T00:00:00-05:00 | Polarization Diagnostics Applied to Coronal Mass Ejections and the Background Solar Wind | arXiv:2511.00714v2 Announce Type: replace Abstract: The ratio of radially to tangentially polarized Thomson-scattered white light provides a powerful tool for locating the 3D position of compact structures in the solar corona and inner heliosphere, and the Polarimeter to Unify the Corona and Heliosphere (PUNCH) has bee... | https://arxiv.org/abs/2511.00714 | Academic Papers | svg |
bb4a2183ff38c007927d021b0a80baef715b3ff2223e523c858cbe38d4b1d564 | 2026-01-21T00:00:00-05:00 | Limits of self-interacting neutrinos from the BAO and CMB phase shift | arXiv:2511.00800v2 Announce Type: replace Abstract: Neutrinos with Standard Model interactions free-stream in the early Universe, leaving a distinct phase shift in the pattern of baryon acoustic oscillations (BAO). When isolated, this phase shift allows one to robustly infer the presence of the cosmic neutrino backgrou... | https://arxiv.org/abs/2511.00800 | Academic Papers | svg |
4f7ba4bfc9e027cd4197d69dab4f8daabae5112e9ccb327ae11b4e76d62504e6 | 2026-01-21T00:00:00-05:00 | Uncertainties in the production of iron-group nuclides in core-collapse supernovae from Monte Carlo variations of reaction rates | arXiv:2511.01859v3 Announce Type: replace Abstract: Core-collapse supernovae, occurring at the end of massive star evolution, produce heavy elements, including those in the iron peak. Although the explosion mechanism is not yet fully understood, theoretical models can reproduce optical observations and observed element... | https://arxiv.org/abs/2511.01859 | Academic Papers | svg |
327033f518e4623fad3a6a4ba551634b6a3376a2a66fda5a33cbd84c4bb0d8f3 | 2026-01-21T00:00:00-05:00 | Artificial Precision Polarization Array: Sensitivity for the axion-like dark matter with clock satellites | arXiv:2511.04400v2 Announce Type: replace Abstract: The approaches to searching for axion-like signals based on pulsars include observations with pulsar timing arrays (PTAs) and pulsar polarization arrays (PPAs). However, these methods are limited by observational uncertainties arising from multiple unknown and periodi... | https://arxiv.org/abs/2511.04400 | Academic Papers | svg |
69939d7e53ee7f34abb3141552d6e12a95e2de8a86bd83e395378bbee5c233f9 | 2026-01-21T00:00:00-05:00 | Electron Cyclotron Maser Emission as the Driving Mechanism in Long-Period Radio Transients | arXiv:2511.15154v2 Announce Type: replace Abstract: Long-period radio transients (LPRTs) are highly polarised, coherent radio sources with periods of minutes to hours and bursts typically lasting 10 to 100 s. Here we consider the apparently isolated subclass of LPRTs and argue that electron cyclotron maser emission (EC... | https://arxiv.org/abs/2511.15154 | Academic Papers | svg |
e1f60a102475c1b57c73dda84ac8c3af404a6c152828d3c22f8ac73fabf0e344 | 2026-01-21T00:00:00-05:00 | Explosions in the Empty: A Survey of Transients in Local Void Galaxies | arXiv:2511.15401v2 Announce Type: replace Abstract: We present a systematic analysis of transient astrophysical events -- including supernovae (SNe), gamma-ray bursts (GRBs), and fast radio bursts (FRBs) -- in void and non-void galaxies within the local universe ($0.005 < z < 0.05$). Cosmic voids, defined by low galaxy... | https://arxiv.org/abs/2511.15401 | Academic Papers | svg |
a5e848c87194c34940736ed02450f888d63030f66a24b646c164735d9421461a | 2026-01-21T00:00:00-05:00 | Absorption effects in the expanding Universe: spectral transmittance functions of intergalactic medium for distant sources | arXiv:2511.16291v2 Announce Type: replace Abstract: We analyse the formation of broad absorption troughs in the spectra of high-redshift sources in the redshift range $5\le z\le15$ for two observationally motivated reionization histories inferred from distant galaxy spectra and CMB polarization measurements. We assume ... | https://arxiv.org/abs/2511.16291 | Academic Papers | svg |
ff4ba69b801aad8ab63cc0e76c968458bc3515d15ab69429aa8a2a1d5bce2433 | 2026-01-21T00:00:00-05:00 | JWST COMPASS: Insights into the Systematic Noise Properties of NIRSpec/G395H From a Uniform Reanalysis of Seven Transmission Spectra | arXiv:2511.18196v2 Announce Type: replace Abstract: JWST has already observed near-infrared transmission spectra of over a dozen super-Earths and sub-Neptunes. While some observations have allowed astronomers to characterize sub-Neptunes in unprecedented detail, small feature amplitudes and poorly-understood systematic... | https://arxiv.org/abs/2511.18196 | Academic Papers | svg |
010916581dda41d2ee3bba2f8adfde46799ed6a05286218236863fca90038e0c | 2026-01-21T00:00:00-05:00 | Connecting Star Formation in the Milky Way and Nearby Galaxies -II. An Observationally Driven Analytical Model for Predicting Cloud-Scale Star Formation Rates | arXiv:2511.22985v2 Announce Type: replace Abstract: We construct a model by integrating observational constraints from the Milky Way and nearby galaxies to predict cloud-scale star formation rates (SFRs). In the model, we first estimate the initial total mass of clumps in a cloud based on the cloud mass, and then gener... | https://arxiv.org/abs/2511.22985 | Academic Papers | svg |
907e0adcf038f1979ecdfd17a1f31bb50cd1ac4a4435937d0b191a0b2b4dbcb2 | 2026-01-21T00:00:00-05:00 | The Kinematic Properties of T\.ZO Candidate HV 11417 with Gaia DR3 | arXiv:2511.23368v2 Announce Type: replace Abstract: HV 11417 is a candidate Thorne-\.Zytkow Object, a red supergiant with a neutron star core, located within the Small Magellanic Cloud (SMC). Previous studies have questioned, using Gaia DR2 data, whether HV 11417 was truly located at the distance of the SMC or was inst... | https://arxiv.org/abs/2511.23368 | Academic Papers | svg |
f03c13b6a3ac2805102e70b9a1bba0d6d15cc61a7b0a86aa73c32d42458ce011 | 2026-01-21T00:00:00-05:00 | The art of simulating the early Universe. Part II. Non-canonical cases & gravitational waves | arXiv:2512.15627v2 Announce Type: replace Abstract: We present a discussion on lattice techniques for the simulation of non-canonical field theory circumstances, complementing our previous monograph (arXiv:2006.15122) on canonical cases. We begin by reviewing basic aspects of lattice field theory, including symplectic ... | https://arxiv.org/abs/2512.15627 | Academic Papers | svg |
3f6bab5d6c76916038989f4ae75cf008d628f9a1287037484fd24612f27babb1 | 2026-01-21T00:00:00-05:00 | A spectroscopically confirmed, strongly lensed, metal-poor Type II supernova at z = 5.13 | arXiv:2601.04156v2 Announce Type: replace Abstract: Observing supernovae (SNe) in the early Universe (z > 3) provides a window into how both galaxies and individual stars have evolved over cosmic time, yet a detailed study of high-redshift stars and SNe has remained difficult due to their extreme distances and cosmolog... | https://arxiv.org/abs/2601.04156 | Academic Papers | svg |
5e28dc2abb7e68170f7007462161dff6fdd24b7fac8b721d0391eef77dcb27fe | 2026-01-21T00:00:00-05:00 | Nitrogen enhancement of GN-z11 by metal pollution from supermassive stars | arXiv:2601.04344v2 Announce Type: replace Abstract: Spectroscopic observations by the James Webb Space Telescope (JWST) have revealed young, compact, high-redshift ($z$) galaxies with high nitrogen-to-oxygen (N/O) ratios. GN-z11 at z=10.6 is one of these galaxies. One possible scenario for such a high N/O ratio is poll... | https://arxiv.org/abs/2601.04344 | Academic Papers | svg |
63509407af5b6a8555fa4ba12061d56ac08c527eda335fa4d2fff57fbcd11ebb | 2026-01-21T00:00:00-05:00 | Triaxial Magnetars as Sources of Fast Radio Bursts | arXiv:2601.04953v2 Announce Type: replace Abstract: I suggest that some of the mysterious temporal properties of Fast Radio Bursts (FRB) may be explained if they are produced by dynamically triaxial magnetars. If the bursts are narrowly collimated along open field lines, then observed repeating FRB may be those in whic... | https://arxiv.org/abs/2601.04953 | Academic Papers | svg |
a9a76ceacb4808c2f4d8287745919cb8b0d58f0dc8f3d4c706eff6f23e81c8ea | 2026-01-21T00:00:00-05:00 | Constraining the Primordial Black Hole Abundance with Space-Based Detectors | arXiv:2601.05069v2 Announce Type: replace Abstract: Overdense regions can collapse into primordial black holes (PBHs) in the early universe, which are a compelling candidate for dark matter. Current constraints leave the asteroid-mass window the only possible one for PBH to account for all the dark matter, which can on... | https://arxiv.org/abs/2601.05069 | Academic Papers | svg |
7cbb897478c675b171e63f02ddd59ae25937266b404b84ae24ca35318670b5f7 | 2026-01-21T00:00:00-05:00 | The drastic impact of Eddington-limit induced mass ejections on massive star populations | arXiv:2601.08822v2 Announce Type: replace Abstract: Massive stars are the key engines of the Universe. However, their evolution and thus their ionizing feedback are still not fully understood. One of the largest gaps in current stellar evolution calculations is the lack of a model for the mass ejections that occur when... | https://arxiv.org/abs/2601.08822 | Academic Papers | svg |
998164851d6968d895cff15e2ad81d7c3d8442c84244e80ee84444e34ccb40a5 | 2026-01-21T00:00:00-05:00 | Using 23 Years of ACS/SBC Data to Understand Backgrounds: Explaining & Predicting Background Variations | arXiv:2601.09682v2 Announce Type: replace Abstract: 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 unders... | https://arxiv.org/abs/2601.09682 | Academic Papers | svg |
11aadeb5648063bdd5855342d82163add87552176973aa662cbd42435a5f22a7 | 2026-01-21T00:00:00-05:00 | The impact of disc photoevaporation on the long-term evolution of giant planets in mean motion resonances | arXiv:2601.10811v2 Announce Type: replace Abstract: We investigate the long-term impact of disc photoevaporation on the dynamical stability and evolution of giant planet pairs in mean motion resonances. Using two-dimensional hydrodynamical simulations with FARGO3D, in which we have included mass-loss due to photoevapor... | https://arxiv.org/abs/2601.10811 | Academic Papers | svg |
45e931525e18de342a4a57cc935795ebf4cacedc36fcb15b0b34c6161315bcbc | 2026-01-21T00:00:00-05:00 | Radiative Cooling Effects on Plasmoid Formation in Black Hole Accretion Flows with Multiple Magnetic Loops | arXiv:2601.10968v2 Announce Type: replace Abstract: We investigate the influence of radiative cooling on plasmoid formation in black hole accretion flows using 2D and 3D two-temperature GRMHD simulations with multi-loop magnetic fields. Our results show that radiative cooling suppresses the transition to a MAD state by... | https://arxiv.org/abs/2601.10968 | Academic Papers | svg |
8958fce1e2e60d634b862bab9b44f7c8017eb050ad6eb883b5c1e3b78b1af9db | 2026-01-21T00:00:00-05:00 | KiDS-Legacy: WIMP dark matter constraints from the cross-correlation of weak lensing and Fermi-LAT gamma rays | arXiv:2601.11223v2 Announce Type: replace Abstract: Dark matter dominates the matter content of the Universe, and its properties can be constrained through large-scale structure probes such as the cross-correlation between the unresolved gamma-ray background (UGRB) and weak gravitational lensing. We analysed 15 years o... | https://arxiv.org/abs/2601.11223 | Academic Papers | svg |
9b4890fc93a80626a3e57460be6f8f8cf0d3a7290436639d082785a150e2a5a8 | 2026-01-21T00:00:00-05:00 | Determination of varying speed of light from Black hole | arXiv:2110.08809v2 Announce Type: replace-cross Abstract: The Generalized Cosmological Time (GCT) framework offers an alternative phenomenological approach to addressing the Hubble tension and the observed time dilation of Type Ia supernovae, characterized by a background parameter b \simeq 0.04 and an associated cosmo... | https://arxiv.org/abs/2110.08809 | Academic Papers | svg |
09dae8ebddb341a94935d8a1fe31d30cbd87d39337f13ed491034ab6a0f0a90e | 2026-01-21T00:00:00-05:00 | Strongly Interacting Dark Matter admixed Neutron Stars | arXiv:2503.19691v3 Announce Type: replace-cross Abstract: Dark matter may accumulate in neutron stars given its gravitational interaction and abundance. We investigate the modification of neutron star properties and confront them with the observations in the context of strongly-interacting dark matter scenario, specifi... | https://arxiv.org/abs/2503.19691 | Academic Papers | svg |
f6aec0cf439e9e08a1fbf5548159656ab5e764f9231211d4c1711d747156d0b3 | 2026-01-21T00:00:00-05:00 | Deflection angle in the strong deflection limit for static and axisymmetric spacetimes: Local curvature, matter fields, and quasinormal modes | arXiv:2504.07906v4 Announce Type: replace-cross Abstract: We investigate the deflection of photons in the strong deflection limit within static and axisymmetric spacetimes possessing reflection symmetry. As the impact parameter approaches its critical value, the deflection angle exhibits a logarithmic divergence. This ... | https://arxiv.org/abs/2504.07906 | Academic Papers | svg |
3dfe6ebd35b89c43c4ff23d2c7c2cd89a082c93e5bf0261a7182f80cd109848c | 2026-01-21T00:00:00-05:00 | Bumblebee cosmology: The FLRW solution and the CMB temperature anisotropy | arXiv:2504.10297v2 Announce Type: replace-cross Abstract: We put into test the idea of replacing dark energy by a vector field against the cosmic microwave background (CMB) observation using the simplest vector-tensor theory, where a massive vector field couples to the Ricci scalar and the Ricci tensor quadratically. F... | https://arxiv.org/abs/2504.10297 | Academic Papers | svg |
dfaef5bca8febf0c7be6bee049bf3b31600f76bc865ac271e6e8bc53614dd12b | 2026-01-21T00:00:00-05:00 | Indirect searches for realistic sub-GeV Dark Matter models | arXiv:2508.03819v3 Announce Type: replace-cross Abstract: Indirect searches for Dark Matter (DM) particles with mass in the MeV -- GeV scale have received significant attention lately. Pair-annihilations of such DM particles in the Galaxy can give rise to (at the same time) MeV to GeV $\gamma$-rays via prompt emission,... | https://arxiv.org/abs/2508.03819 | Academic Papers | svg |
733c16bc3b8b15208d304ffe2148031ec80394a837e62fbaf6247ad359529756 | 2026-01-21T00:00:00-05:00 | Discrete Chi-Square Method can model and forecast complex time series | arXiv:2509.01540v4 Announce Type: replace-cross Abstract: We show how intensive, large and accurate time series can allow us to see through time. Many phenomena have aperiodic and periodic components. An ideal time series analysis method would detect such trend and signal(-s) combinations. The widely-used Discrete Four... | https://arxiv.org/abs/2509.01540 | Academic Papers | svg |
8e39c1a31f0f20505ed366218c6c4aab418e8f4bbe34863abd46313e7c9fab99 | 2026-01-21T00:00:00-05:00 | Bouncing Cosmologies in modified gravity with space time torsion | arXiv:2509.03508v3 Announce Type: replace-cross Abstract: We explore the possibility of realizing a non-singular bounce in the early universe within the framework of modified gravity with spacetime torsion. In Einstein Cartan theory, torsion is embedded in the spacetime by adding an antisymmetric part in affine connect... | https://arxiv.org/abs/2509.03508 | Academic Papers | svg |
48d2b7ed62355de2796ffc03cf6c950dea548593a985584b6fadc67240d3ef13 | 2026-01-21T00:00:00-05:00 | Hyperons in Neutron Stars across the observed mass range: Insights from realistic $\Lambda$-N and $\Lambda$-$\Lambda$ interactions within a Microscopic Framework | arXiv:2509.12881v2 Announce Type: replace-cross Abstract: We investigate the equation of state (EOS) and macroscopic properties of neutron stars (NSs) and hyperonic stars within the framework of the lowest order constrained variational (LOCV) method, extended to include interacting $\Lambda$ hyperons. The nucleon-nucle... | https://arxiv.org/abs/2509.12881 | Academic Papers | svg |
2c314ac1027a113e9fa8ecb5ad0e8c990372e17ee7960e29a103d351caa8e6ba | 2026-01-21T00:00:00-05:00 | Charged particle dynamics in singular spacetimes: hydrogenic mapping and curvature-corrected thermodynamics | arXiv:2509.16289v2 Announce Type: replace-cross Abstract: We analyze the dynamics of charged test particles in a singular, horizonless spacetime arising as the massless limit of a charged wormhole in the Einstein--Maxwell--Scalar (EMS) framework. The geometry, sustained solely by an electric charge $Q$, features an inf... | https://arxiv.org/abs/2509.16289 | Academic Papers | svg |
1e8e79d914df7e21cd7d1d34f55efdf01e9f8c82460c8fc15780cfce7c163606 | 2026-01-21T00:00:00-05:00 | High Reheating Temperature without Axion Domain Walls | arXiv:2509.24812v2 Announce Type: replace-cross Abstract: We investigate a cosmological scenario in which the Peccei-Quinn (PQ) symmetry remains broken in the entire history of the Universe, thereby avoiding the formation of axion strings and domain walls. Contrary to the conventional expectation, it is demonstrated th... | https://arxiv.org/abs/2509.24812 | Academic Papers | svg |
16cf8c276141ebca080d07807c9f62c70f47f702cb6f1cce8a8f83c0cfc3d6ea | 2026-01-21T00:00:00-05:00 | Implications of $f(R)$ gravity on late-time cosmic structure growth through a complete description of density perturbations | arXiv:2510.19569v2 Announce Type: replace-cross Abstract: We provide insight about the full form of the equations for matter density perturbations and the scalar Bardeen metric potentials in general $f(R)$ theories of gravity. When considering viable modifications to the standard $\Lambda$CDM background, the full scale... | https://arxiv.org/abs/2510.19569 | Academic Papers | svg |
04187daa51b88eb6c9aec142c68ed7e7f27f67fecc55ac62ad727f28aa58e504 | 2026-01-21T00:00:00-05:00 | Time-dependent flux backgrounds in type IIB supergravity | arXiv:2512.19793v2 Announce Type: replace-cross Abstract: We analytically construct families of type IIB supergravity backgrounds in ten dimensions in which the four-dimensional metric is time dependent, while the six-dimensional internal space is an arbitrary compact Calabi-Yau manifold (with no restriction on holonom... | https://arxiv.org/abs/2512.19793 | Academic Papers | svg |
b81c47536930e936299d58d7b7c28c1483784fc22191bd358dbceeb4b3d9fa1b | 2026-01-21T00:00:00-05:00 | Taxonomy of periodic orbits and gravitational waves in a deformed Schwarzschild black hole spacetime | arXiv:2601.00550v3 Announce Type: replace-cross Abstract: In this paper, we investigate periodic orbits of test particles around a deformed Schwarzschild black hole and the resulting gravitational waves. Firstly, we examine the properties of circular orbits and find that circular orbits could disappear when the deforma... | https://arxiv.org/abs/2601.00550 | Academic Papers | svg |
9481e966f72f5292cd9f4c4312439484139f8573fc6237453ef0934b85d3f090 | 2026-01-21T00:00:00-05:00 | From the Wavefunction of the Universe to In-In-Correlators: A Perturbative Map to All Orders | arXiv:2601.00992v2 Announce Type: replace-cross Abstract: Both the Wavefunction of the Universe and the Schwinger-Keldysh in-in formalism are central tools for analyzing primordial cosmological observables, such as equal-time correlation functions. While their conceptual equivalence is well established, a systematic an... | https://arxiv.org/abs/2601.00992 | Academic Papers | svg |
c54b454c922417db70b1d8f29768a0e5d641fd933fab8b0dea36b5c4d4c5efd7 | 2026-01-21T00:00:00-05:00 | Symmetries of cosmological perturbations: The residual low-multipole ambiguity | arXiv:2601.04144v2 Announce Type: replace-cross Abstract: In cosmology, long-wavelength modes are related to large-gauge transformations (LGT), i.e. changes of coordinates that modify the physical geometry of the cosmological patch. These LGTs stand as bona-fide symmetries of cosmological perturbation theory with vario... | https://arxiv.org/abs/2601.04144 | Academic Papers | svg |
d6b86ba6c4535f1b288a5f7dac06ed0b6b54664d4e665ce6b23198ccbabea6f3 | 2026-01-21T00:00:00-05:00 | Reevaluating Causal Estimation Methods with Data from a Product Release | arXiv:2601.11845v1 Announce Type: new Abstract: Recent developments in causal machine learning methods have made it easier to estimate flexible relationships between confounders, treatments and outcomes, making unconfoundedness assumptions in causal analysis more palatable. How successful are these approaches in recove... | https://arxiv.org/abs/2601.11845 | Academic Papers | svg |
b5218afbcc6f054d563274f1b556a917f80221572f92ecbf57a703ef0b30cda3 | 2026-01-21T00:00:00-05:00 | Public Education Spending and Income Inequality | arXiv:2601.11928v1 Announce Type: new Abstract: This paper investigates the relationship between public education spending and income inequality across U.S. counties from 2010 to 2022 using quantile regression methods. The analysis shows that total per pupil education spending is consistently associated with a small in... | https://arxiv.org/abs/2601.11928 | Academic Papers | svg |
d2dba26c25fbfed21d9061c6a69da5dfd3dc3ea194863760b7ce858291546874 | 2026-01-21T00:00:00-05:00 | Nonlinear Dynamic Factor Analysis With a Transformer Network | arXiv:2601.12039v1 Announce Type: new Abstract: The paper develops a Transformer architecture for estimating dynamic factors from multivariate time series data under flexible identification assumptions. Performance on small datasets is improved substantially by using a conventional factor model as prior information via... | https://arxiv.org/abs/2601.12039 | Academic Papers | svg |
271c2b64de927a9e2dadc013948951d3644b03071ee2bcc1bc52837fb85247cc | 2026-01-21T00:00:00-05:00 | Irreversible Failure Reverses the Value of Information | arXiv:2601.12046v1 Announce Type: new Abstract: We study dynamic games with hidden states and absorbing failure, where belief-driven actions can trigger irreversible collapse. In such environments, equilibria that sustain activity generically operate at the boundary of viability. We show that this geometry endogenously... | https://arxiv.org/abs/2601.12046 | Academic Papers | svg |
9f42854daab837c6ef968fa52dbc672cd835d5328fb63a902bccd9d033ed4ca9 | 2026-01-21T00:00:00-05:00 | Measuring growth and convergence at the mesoscale | arXiv:2601.12158v1 Announce Type: new Abstract: Global inequality has shifted inward, with rising dispersion increasingly occurring within countries rather than between them. Using 8,790 newly harmonised Functional Urban Areas (FUAs), micro-founded labour-market regions encompassing 3.9 billion people and representing ... | https://arxiv.org/abs/2601.12158 | Academic Papers | svg |
ce3bce43c6a770c1dae408b0341f7d711722a168e860583b4b0988b116255d78 | 2026-01-21T00:00:00-05:00 | A Robust Similarity Estimator | arXiv:2601.12198v1 Announce Type: new Abstract: We construct and analyze an estimator of association between random variables based on their similarity in both direction and magnitude. Under special conditions, the proposed measure becomes a robust and consistent estimator of the linear correlation, for which an exact ... | https://arxiv.org/abs/2601.12198 | Academic Papers | svg |
dcc27d9754be2e2e55b8042945ec907ebeac92eb5bcdb7b21005b9e5a4b8beed | 2026-01-21T00:00:00-05:00 | The Economics of Digital Intelligence Capital: Endogenous Depreciation and the Structural Jevons Paradox | arXiv:2601.12339v1 Announce Type: new Abstract: This paper develops a micro-founded economic theory of the AI industry by modeling large language models as a distinct asset class-Digital Intelligence Capital-characterized by data-compute complementarities, increasing returns to scale, and relative (rather than absolute... | https://arxiv.org/abs/2601.12339 | Academic Papers | svg |
6c7885ab4771023d225f2465ee634052fd7d8421ea253bc4cbb5aeabec20234f | 2026-01-21T00:00:00-05:00 | How Well Do LLMs Predict Human Behavior? A Measure of their Pretrained Knowledge | arXiv:2601.12343v1 Announce Type: new Abstract: Large language models (LLMs) are increasingly used to predict human behavior. We propose a measure for evaluating how much knowledge a pretrained LLM brings to such a prediction: its equivalent sample size, defined as the amount of task-specific data needed to match the p... | https://arxiv.org/abs/2601.12343 | Academic Papers | svg |
2e160e2798e073ebe9dec7c5e1b8b7ab820dfee358f19dce89f1f2f0bb6d8c4a | 2026-01-21T00:00:00-05:00 | Generative AI as a Non-Convex Supply Shock: Market Bifurcation and Welfare Analysis | arXiv:2601.12488v1 Announce Type: new Abstract: The diffusion of Generative AI (GenAI) constitutes a supply shock of a fundamentally different nature: while marginal production costs approach zero, content generation creates congestion externalities through information pollution. We develop a three-layer general equili... | https://arxiv.org/abs/2601.12488 | Academic Papers | svg |
71001904c4dc0a55df54c8de2e92640ed44bfb740306f7567a708d2d0f715295 | 2026-01-21T00:00:00-05:00 | Quasi-Concavity, Convexity of Optimal Actions, and the Local Single-Crossing Property | arXiv:2601.12783v1 Announce Type: new Abstract: This note presents two results. First, it shows that under mild conditions, a decision problem is quasi-concave if the set of optimal actions is convex under every belief. Second, it shows that if a decision problem is quasi-concave, then it satisfies the local single cro... | https://arxiv.org/abs/2601.12783 | Academic Papers | svg |
ea3b26f6279e5d20894b3625f15aa38c7aa0ecd78218d2195956dc88ae846756 | 2026-01-21T00:00:00-05:00 | Liability Sharing and Staffing in AI-Assisted Online Medical Consultation | arXiv:2601.12817v1 Announce Type: new Abstract: Liability sharing and staffing jointly determine service quality in AI-assisted online medical consultation, yet their interaction is rarely examined in an integrated framework linking contracts to congestion via physician responses. This paper develops a Stackelberg queu... | https://arxiv.org/abs/2601.12817 | Academic Papers | svg |
b1e977a7508edfa7633f630704035871e82f90423b315584eebb34189b72c732 | 2026-01-21T00:00:00-05:00 | Quantitative Methods in Finance | arXiv:2601.12896v1 Announce Type: new Abstract: These lecture notes provide a comprehensive introduction to Quantitative Methods in Finance (QMF), designed for graduate students in finance and economics with heterogeneous programming backgrounds. The material develops a unified toolkit combining probability theory, sta... | https://arxiv.org/abs/2601.12896 | Academic Papers | svg |
b76c81ea2420d218475a05a46c01621c7114aa9caa7393037f11920bfe974602 | 2026-01-21T00:00:00-05:00 | Realised quantile-based estimation of the integrated variance | arXiv:2601.13006v1 Announce Type: new Abstract: In this paper, we propose a new jump robust quantile-based realised variance measure of ex-post return variation that can be computed using potentially noisy data. The estimator is consistent for the integrated variance and we present feasible central limit theorems which... | https://arxiv.org/abs/2601.13006 | Academic Papers | svg |
1143ceb107f2c89a059d115f254450ef8f1f4784afeded8d472293ed57b4f6c7 | 2026-01-21T00:00:00-05:00 | A machine learning approach to volatility forecasting | arXiv:2601.13014v1 Announce Type: new Abstract: We inspect how accurate machine learning (ML) is at forecasting realized variance of the Dow Jones Industrial Average index constituents. We compare several ML algorithms, including regularization, regression trees, and neural networks, to multiple Heterogeneous AutoRegre... | https://arxiv.org/abs/2601.13014 | Academic Papers | svg |
6762b73d21145b1f949fb243b7e2165d8e26d58ef424157e05d8c055fccea0c0 | 2026-01-21T00:00:00-05:00 | Spectral Dynamics and Regularization for High-Dimensional Copulas | arXiv:2601.13281v1 Announce Type: new Abstract: We introduce a novel model for time-varying, asymmetric, tail-dependent copulas in high dimensions that incorporates both spectral dynamics and regularization. The dynamics of the dependence matrix' eigenvalues are modeled in a score-driven way, while biases in the uncond... | https://arxiv.org/abs/2601.13281 | Academic Papers | svg |
fc6a7e7f0a588560df3e5de2c176e9f6c43ef5f6a4697793870d597e7ebc4157 | 2026-01-21T00:00:00-05:00 | The accumulation of knowledge with intra-industry knowledge spillovers: A competition game and the Nash equilibrium based on firm cost minimisation | arXiv:2601.13282v1 Announce Type: new Abstract: This paper examines a competition game whose key variables are the R&D efforts (e.g. R&D expenditures) and accumulated knowledge of firms located in a specific region. The most significant element of accumulated knowledge is knowledge spillovers. These are conside... | https://arxiv.org/abs/2601.13282 | Academic Papers | svg |
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