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1a103490b6f0d8d81058292c38bb384f2ef2feeeb09d428e3394240a153bf28f | 2026-02-02T00:00:00-05:00 | Hyperconvexity in partial metric spaces: challenges and outlooks | arXiv:2601.02279v2 Announce Type: replace Abstract: In this article, we present several different ways to define hyperconvexity in partial metric spaces. In particular, we show that the analogue of the Aronszajn--Panitchpakdi notion of hyperconvexity fails to exhibit certain key properties present in the classical metr... | https://arxiv.org/abs/2601.02279 | Academic Papers | svg |
d5d6bad42dac7e08961927a93d60ef58e52c7dbb278d44116d584f716aae4c07 | 2026-02-02T00:00:00-05:00 | On $W^{2,\varepsilon}$-estimates for a class of singular-degenerate parabolic equations | arXiv:2601.04324v2 Announce Type: replace Abstract: We study a class of parabolic equations in non-divergence form with measurable coefficients that exhibit singular and/or degenerate behavior governed by weights in the $A_{1+\frac{1}{n}}$-Muckenhoupt class. Under a smallness assumption on a weighted mean oscillation o... | https://arxiv.org/abs/2601.04324 | Academic Papers | svg |
84b5f18cffd13a807300f1ebb6d45dda78eb2f016fd0ced01b0c75dccdcc702a | 2026-02-02T00:00:00-05:00 | The wanted extension of Fujii and Tsurumaru's formula for the spectral radius of the Bell-CHSH operator | arXiv:2601.09392v2 Announce Type: replace Abstract: This paper is motivated by a recent paper of Yuki Fujii and Toyohiro Tsurumaru in which they established a beautiful formula for the spectral radius of the Bell-CHSH operator on finite-dimensional Hilbert spaces. To tackle the operator on infinite-dimensional spaces, ... | https://arxiv.org/abs/2601.09392 | Academic Papers | svg |
e6c4f6709df0d583852055b98b4d52699ca27c897fe861c8b4a0115eb34f4cc1 | 2026-02-02T00:00:00-05:00 | Some Families of Type $B$ Set Partitions Counted by the Dowling Numbers | arXiv:2601.17174v2 Announce Type: replace Abstract: In this paper, we study type $B$ set partitions without zero block. Certain classes of these partitions, such as merging-free and separated partitions (enumerated by the Dowling numbers), are investigated. We show that these classes are in bijection with type $B$ set ... | https://arxiv.org/abs/2601.17174 | Academic Papers | svg |
d6c17fe0973ee5dcec292aec32342be8f7e0f52ac45dbfabc0d4685f9ad33cd9 | 2026-02-02T00:00:00-05:00 | Asymptotics of the d'Arcais Numbers at Small $k$ | arXiv:2601.18599v3 Announce Type: replace Abstract: The d'Arcais numbers are the triangular array $\{A(2,n,k)\, :\, n=0,1,\dots,\, k=0,\dots,n\}$, such that $\sum_{n=0}^{\infty} \sum_{k=0}^{n} A(2,n,k) x^k z^n/n! = ((z;z)_{\infty})^{-x}$. The infinite $q$-Pochhammer symbol is $(q;q)_{\infty} = \prod_{n=1}^{\infty} (1-q... | https://arxiv.org/abs/2601.18599 | Academic Papers | svg |
01894ebffd82f72731cc0874506469c944d825a100c6df89f1a1ec335e6cba26 | 2026-02-02T00:00:00-05:00 | On the SOS Rank of Simple and Diagonal Biquadratic Forms | arXiv:2601.19195v2 Announce Type: replace Abstract: We study the sum-of-squares (SOS) rank of simple and diagonal biquadratic forms. For simple biquadratic forms in $3 \times 3$ variables, we show that the maximum SOS rank is exactly $6$, attained by a specific six-term form. We further prove that for any $m \ge 3$, th... | https://arxiv.org/abs/2601.19195 | Academic Papers | svg |
5ae8c629afbe0085973bd8d8cb3cbe3801c21b274907347326865013d8d6d533 | 2026-02-02T00:00:00-05:00 | Spectral stability of shock profiles for the Navier-Stokes-Poisson system | arXiv:2601.20684v2 Announce Type: replace Abstract: We investigate the spectral stability of small-amplitude shock profiles for the one-dimensional isothermal Navier-Stokes-Poisson system, which describes ion dynamics in a collision-dominated plasma. Specifically, we establish (i) bounds on the essential spectrum, (ii)... | https://arxiv.org/abs/2601.20684 | Academic Papers | svg |
648c0c7dc91a571bffe0f7eeeada86d3113787044f6002a86142cb38f43ab27a | 2026-02-02T00:00:00-05:00 | A locking-free mixed virtual element discretization for the elasticity eigenvalue problem | arXiv:2601.20807v2 Announce Type: replace Abstract: In this paper, we introduce a mixed virtual element method to approximate the eigenvalues and eigenfunctions of the two-dimensional elasticity eigenvalue problem. Under standard assumptions on the meshes, we prove the convergence of the discrete solution operator to t... | https://arxiv.org/abs/2601.20807 | Academic Papers | svg |
169456963a2aeee1a56186544e43f5141306dd54df610b4331164342cc29ee16 | 2026-02-02T00:00:00-05:00 | Identification of space-dependent coefficients in two competing terms of a nonlinear subdiffusion equation | arXiv:2601.21018v2 Announce Type: replace Abstract: We consider a (sub)diffusion equation with a nonlinearity of the form $pf(u)-qu$, where $p$ and $q$ are space dependent functions. Prominent examples are the Fisher-KPP, the Frank-Kamenetskii-Zeldovich and the Allen-Cahn equations. We devise a fixed point scheme for r... | https://arxiv.org/abs/2601.21018 | Academic Papers | svg |
e9bfc0fc2b00dae56439b4e950bd5bb354ca2a600c9a0768a27dcc383263e8a7 | 2026-02-02T00:00:00-05:00 | Decay rates to equilibrium in a nonlinear subdiffusion equation with two counteracting terms | arXiv:2601.21038v2 Announce Type: replace Abstract: In this paper we prove convergence to a steady state as $t\to\infty$ for solutions to the subdiffusion equation \[ \partial_t^\alpha u - \mathbb{L} u = q(x)u - p(x)f(u) + r \] with the exponential ($\alpha=1$) or power law ($\alpha\in[0,1)$) rates under mild condition... | https://arxiv.org/abs/2601.21038 | Academic Papers | svg |
e1ea666f8cf68d0dd3a71d1f8d60481428fdd43e019916430623f35897129620 | 2026-02-02T00:00:00-05:00 | Explicit Construction of Maass Wave Forms and Their Petersson Inner Products | arXiv:2601.21588v2 Announce Type: replace Abstract: In this paper, we explicitly construct Maass wave cusp forms associated to Hecke characters on arbitrary real quadratic fields. This result is a generalization of Maass (1949), who constructed Maass wave cusp forms under the assumption that narrow class number is one.... | https://arxiv.org/abs/2601.21588 | Academic Papers | svg |
af947497601e7eab8108ab56af67860e2bd96beaca35704b7244270390ce2ac1 | 2026-02-02T00:00:00-05:00 | The sum-product problem for small sets II | arXiv:2601.21828v2 Announce Type: replace Abstract: We establish that every set of $k=10$ natural numbers determines at least $30$ distinct pairwise sums or at least $30$ distinct pairwise products, as well as the analogous result for $k=11$ and at least $34$ sums/products, with sharpness exhibited by $\{1, 2, 3, 4, 6,... | https://arxiv.org/abs/2601.21828 | Academic Papers | svg |
6a18195e9a5656fd785510a224d142b4f69533feec3914c48cc40ba3a2ab7084 | 2026-02-02T00:00:00-05:00 | Iterative execution of discrete and inverse discrete Fourier transforms with applications for signal denoising via sparsification | arXiv:2211.09284v4 Announce Type: replace-cross Abstract: We describe a family of iterative algorithms that involve the repeated execution of discrete and inverse discrete Fourier transforms. One interesting member of this family is motivated by the discrete Fourier transform uncertainty principle and involves the appl... | https://arxiv.org/abs/2211.09284 | Academic Papers | svg |
5e669036a3ee2ecde2171c2c436fae198f9318f2e3a823991ac90c1a1ce6fcaf | 2026-02-02T00:00:00-05:00 | Quantum speedups for linear programming via interior point methods | arXiv:2311.03215v3 Announce Type: replace-cross Abstract: We describe a quantum algorithm based on an interior point method for solving a linear program with $n$ inequality constraints on $d$ variables. The algorithm explicitly returns a feasible solution that is $\varepsilon$-close to optimal, and runs in time $\sqrt{... | https://arxiv.org/abs/2311.03215 | Academic Papers | svg |
2b80967e7f4501adaa0a5d1709b009244a372eebadae12f0bc7303c0e6b593cf | 2026-02-02T00:00:00-05:00 | Extending Mean-Field Variational Inference via Entropic Regularization: Theory and Computation | arXiv:2404.09113v4 Announce Type: replace-cross Abstract: Variational inference (VI) has emerged as a popular method for approximate inference for high-dimensional Bayesian models. In this paper, we propose a novel VI method that extends the naive mean field via entropic regularization, referred to as $\Xi$-variational... | https://arxiv.org/abs/2404.09113 | Academic Papers | svg |
a8bcb3c4a67f5014f89124373bdea6d02551fbfd90f0c499d8f77b51d128d5ee | 2026-02-02T00:00:00-05:00 | Stein's method for marginals on large graphical models | arXiv:2410.11771v3 Announce Type: replace-cross Abstract: Many spatial models exhibit locality structures that effectively reduce their intrinsic dimensionality, enabling efficient approximation and sampling of high-dimensional distributions. However, existing approximation techniques primarily focus on joint distribut... | https://arxiv.org/abs/2410.11771 | Academic Papers | svg |
b357aa706ebdcc581408b77f090af55cdf19d4beb2e0bb85a16ffdc0e7ebb75f | 2026-02-02T00:00:00-05:00 | Capacity-Achieving Entanglement Purification Protocol for Pauli Dephasing Channel | arXiv:2411.14573v2 Announce Type: replace-cross Abstract: Quantum communication enables secure information transmission and entanglement distribution, but these tasks are fundamentally limited by the capacities of quantum channels. While quantum repeaters can mitigate losses and noise, entanglement swapping via a centr... | https://arxiv.org/abs/2411.14573 | Academic Papers | svg |
3ff78ce5ef8d9222804192c89640300c057df2d50a4b9fcb335d60e46d26824f | 2026-02-02T00:00:00-05:00 | Estimation of relative risk, odds ratio and their logarithms with guaranteed accuracy and controlled sample size ratio | arXiv:2503.04876v3 Announce Type: replace-cross Abstract: Given two populations from which independent binary observations are taken with parameters $p_1$ and $p_2$ respectively, estimators are proposed for the relative risk $p_1/p_2$, the odds ratio $p_1(1-p_2)/(p_2(1-p_1))$ and their logarithms. The sampling strategy... | https://arxiv.org/abs/2503.04876 | Academic Papers | svg |
17bafec7a7d6de545d6c8330059fd6478a97ac36ee9c2e989b72da1edd554bb2 | 2026-02-02T00:00:00-05:00 | Fault Tolerant Quantum Simulation via Symplectic Transvections | arXiv:2504.11444v2 Announce Type: replace-cross Abstract: Conventional approaches to fault-tolerant quantum computing realize logical circuits gate-by-gate, synthesizing each gate independently on one or more code blocks. This incurs excess overhead and doesn't leverage common structures in quantum algorithms. In contr... | https://arxiv.org/abs/2504.11444 | Academic Papers | svg |
720be577c55b5dcc77dc723bbebaeef21a0f6f5b84bb1e11aa9a2c18a419ab70 | 2026-02-02T00:00:00-05:00 | Generalization Dynamics of Linear Diffusion Models | arXiv:2505.24769v2 Announce Type: replace-cross Abstract: Diffusion models are powerful generative models that produce high-quality samples from complex data. While their infinite-data behavior is well understood, their generalization with finite data remains less clear. Classical learning theory predicts that generali... | https://arxiv.org/abs/2505.24769 | Academic Papers | svg |
333cb581ac006c6a2e0e8df4f07a6206a0d00b0c6a74a1eeba9edcacaf6e8eca | 2026-02-02T00:00:00-05:00 | First passage of a run-and-tumble particle with exponentially-distributed tumble duration in the presence of a drift | arXiv:2509.11308v2 Announce Type: replace-cross Abstract: We consider a run-and-tumble particle on a finite interval $[a,b]$ with two absorbing end points. The particle has an internal velocity state that switches between three values $v,0,-v$ at exponential times, thus incorporating positive tumble times. Moreover, a ... | https://arxiv.org/abs/2509.11308 | Academic Papers | svg |
c617e86f78f8087a54ea1ef626f94fc7172330ec64b6e87414909c5c29f38cbd | 2026-02-02T00:00:00-05:00 | Direct Bias-Correction Term Estimation for Average Treatment Effect Estimation | arXiv:2509.22122v2 Announce Type: replace-cross Abstract: This study considers the estimation of the direct bias-correction term for estimating the average treatment effect (ATE). Let $\{(X_i, D_i, Y_i)\}_{i=1}^{n}$ be the observations, where $X_i$ denotes $K$-dimensional covariates, $D_i \in \{0, 1\}$ denotes a binary... | https://arxiv.org/abs/2509.22122 | Academic Papers | svg |
c31df86082923ef4844a1c4b5ab2b51b1ecc8ae932c947d70ed0a761aa051812 | 2026-02-02T00:00:00-05:00 | Antiferromagnetic domain walls under spin-orbit torque | arXiv:2509.22241v2 Announce Type: replace-cross Abstract: Domain walls in antiferromagnets under a spin-polarized current present dynamical behavior that is not observed in ferromagnets, and it is tunable by the current polarization. Precessional dynamics is obtained for perpendicular spin polarization. In-plane polari... | https://arxiv.org/abs/2509.22241 | Academic Papers | svg |
ac035401d330150d1bd4e82927e5599da203486a97bbc338963a812192166296 | 2026-02-02T00:00:00-05:00 | Stable Evaluation of Lefschetz Thimble Intersection Numbers: Towards Real-Time Path Integrals | arXiv:2510.06334v3 Announce Type: replace-cross Abstract: We introduce a robust numerical method for determining intersection numbers of Lefschetz thimbles in multivariable settings. Our approach employs the multiple shooting method to solve the upward flow equations from the saddle points to the original integration c... | https://arxiv.org/abs/2510.06334 | Academic Papers | svg |
2f87239639bbd3937942684afd858194014b04275ed1a1f9194d7c5ccb6919bc | 2026-02-02T00:00:00-05:00 | Deep Ensembles for Epistemic Uncertainty: A Frequentist Perspective | arXiv:2510.22063v2 Announce Type: replace-cross Abstract: Decomposing prediction uncertainty into aleatoric (irreducible) and epistemic (reducible) components is critical for the reliable deployment of machine learning systems. While the mutual information between the response variable and model parameters is a princip... | https://arxiv.org/abs/2510.22063 | Academic Papers | svg |
8fd8e09bdcbf60b4801a7f84a9c8e20b4e2e751306d26a073a8b7e821b2bdea3 | 2026-02-02T00:00:00-05:00 | ScoreMatchingRiesz: Score Matching for Debiased Machine Learning and Policy Path Estimation | arXiv:2512.20523v2 Announce Type: replace-cross Abstract: We propose ScoreMatchingRiesz, a family of Riesz representer estimators based on score matching. The Riesz representer is a key nuisance component in debiased machine learning, enabling $\sqrt{n}$-consistent and asymptotically efficient estimation of causal and ... | https://arxiv.org/abs/2512.20523 | Academic Papers | svg |
611e2e0fe46d5ce41acaaaf0b8e73e89873b13d754b7ee207aadda867835694f | 2026-02-02T00:00:00-05:00 | Quantum Universality in Composite Systems: A Trichotomy of Clifford Resources | arXiv:2512.20787v2 Announce Type: replace-cross Abstract: The Clifford group is efficiently classically simulable, and universality is obtained by supplementing it with non-Clifford resources. We determine which single-qudit gates suffice to achieve universality. We show that the structure of such resources is governed... | https://arxiv.org/abs/2512.20787 | Academic Papers | svg |
ae50c3628a7ccfd029c1fc81a64731e5730e7f2f0580f2d5de2e98af007f42f0 | 2026-02-02T00:00:00-05:00 | A game-theoretic probability approach to loopholes in CHSH experiments | arXiv:2601.09339v2 Announce Type: replace-cross Abstract: We study the CHSH inequality from an informational, timing-sensitive viewpoint using game-theoretic probability, which avoids assuming an underlying probability space. The locality loophole and the measurement-dependence (``freedom-of-choice'') loophole are refo... | https://arxiv.org/abs/2601.09339 | Academic Papers | svg |
5ad9892cda461b49d8c91a93259f1236bf70d0ba51d621d0a3bd78f8334df24a | 2026-02-02T00:00:00-05:00 | The Compound BSDE Method: A Fully Forward Method for Option Pricing and Optimal Stopping Problems in Finance | arXiv:2601.18634v2 Announce Type: replace-cross Abstract: We propose the Compound BSDE method, a fully forward, deep-learning-based approach for solving a broad class of problems in financial mathematics, including optimal stopping. The method is based on a reformulation of option pricing problems in terms of a system ... | https://arxiv.org/abs/2601.18634 | Academic Papers | svg |
a7ae49413e5c98dc0bcb985e65ee34b0b483909ed066fe71ab45313b996d99bb | 2026-02-02T00:00:00-05:00 | Isotropic Equivalence of STVG--MOG and $\Lambda$CDM and Its Breakdown in Large--Scale Anisotropic Cosmological Observables | arXiv:2601.22207v1 Announce Type: new Abstract: We show that Scalar-Tensor-Vector Gravity (STVG-MOG) is observationally equivalent to the standard model $\Lambda$CDM cosmological model for all probes that depend on isotropic and linear gravitational dynamics, including galaxy rotation curves, cluster lensing, the linea... | https://arxiv.org/abs/2601.22207 | Academic Papers | svg |
fa9f6c6cbbecea1ab3858eb954640cb441e9d36aa80da224e70b6783db157369 | 2026-02-02T00:00:00-05:00 | Little Red Dots on FIRE: The Ability of Bursty Galaxies to Host an Abundant Population of High-Redshift AGN | arXiv:2601.22213v1 Announce Type: new Abstract: The James Webb Space Telescope has unveiled an abundant population of potential active galactic nuclei (AGN) at high redshift ($z\gtrsim4$) known as little red dots (LRDs), which are likely hosted in relatively low-mass galaxies. However, previous theoretical models have ... | https://arxiv.org/abs/2601.22213 | Academic Papers | svg |
039c580f2e5ab4e7c2c98e9edf1107c0e4516c2bb7f764faf142d3f0c1b5f286 | 2026-02-02T00:00:00-05:00 | The Little Blue and Red Dots Rosetta Stones: Non-Gaussian broad lines, hot dust, and X-ray weakness | arXiv:2601.22214v1 Announce Type: new Abstract: The population of Active Galactic Nuclei (AGN) newly discovered by the James Webb Space Telescope (JWST) exhibits peculiar properties that distinguish it from both local type I AGN and high-redshift quasars. Most of these sources are compact, appearing as 'little dots': a... | https://arxiv.org/abs/2601.22214 | Academic Papers | svg |
a5786dfc1cf7753983f07886bda7003ccc849aa94cc75a35106a99e19c48df9e | 2026-02-02T00:00:00-05:00 | Drifters on the edge of town: $\lambda$ Bo\"otis stars in clusters | arXiv:2601.22216v1 Announce Type: new Abstract: $\lambda$ Bo\"otis stars are a subset of chemically peculiar A-stars that display Solar abundances in lighter elements (C, N, O, S, etc.) but a deficiency in Iron-peak elements. This difference has been attributed to the A-stars accreting pristine (metal deficient) gas fr... | https://arxiv.org/abs/2601.22216 | Academic Papers | svg |
1a49517a68e6efdc317d5019dd45785788a7ea9611c726a88e13085e691eb734 | 2026-02-02T00:00:00-05:00 | The Perpendicularity of Dust Lanes and Radio Jets in Early-Type Galaxies: Implications for AGN Feedback | arXiv:2601.22217v1 Announce Type: new Abstract: The orientation of radio jets relative to their host galaxies offers an interesting avenue for probing the connection between active galactic nuclei (AGN) and their surroundings. Several studies have also investigated the orientation of nuclear dust features. We follow up... | https://arxiv.org/abs/2601.22217 | Academic Papers | svg |
89c7d5638cd54831e62054e1d7fcf792231e091b7fa29b5f4627fced48c671cc | 2026-02-02T00:00:00-05:00 | Subsolar mass black holes from stellar collapse induced by primordial black holes | arXiv:2601.22220v1 Announce Type: new Abstract: While no gravitational-wave detection of subsolar mass black holes has been confirmed to date, a number of candidate detections invite us to speculate on the origin of such black holes should a detection be confirmed. It is generally assumed that the observation of a blac... | https://arxiv.org/abs/2601.22220 | Academic Papers | svg |
be594adfc345b3e750f3cd5a1b8599b693bc47f99d066de88c7bd141f60c164d | 2026-02-02T00:00:00-05:00 | Insights into the Physical Nature of Polar Ring Galaxies from H I Observations | arXiv:2601.22222v1 Announce Type: new Abstract: Polar ring galaxies (PRGs) host an outer ring of gas and stars oriented nearly perpendicular to the main stellar body. They represent extreme examples of misaligned systems and provide valuable insight into galaxy interactions, gas accretion, and peculiar gas dynamics. We... | https://arxiv.org/abs/2601.22222 | Academic Papers | svg |
55bc22d3154e65ec1cbb6dcb055f56ce59af5f4acbb0a339181c531fff29a75f | 2026-02-02T00:00:00-05:00 | Warps survive beyond fly-by encounters in protoplanetary disks. RW Aur A as a case study | arXiv:2601.22223v1 Announce Type: new Abstract: Stellar fly-bys can have multiple dynamical effects on protoplanetary disks, including warping and the excitation of spiral arms. Since observations indicate that warps are common, we aim to investigate these effects for different fly-by trajectories. We further link our ... | https://arxiv.org/abs/2601.22223 | Academic Papers | svg |
ab46892abf7c610188bc9b07503d6bea5c6bbf00bbd0b62c8f73105a3746060c | 2026-02-02T00:00:00-05:00 | Obscured AGN at z < 1.5: X-ray to Far-Infrared SEDs and Host Galaxy Morphologies in the GOODS Fields | arXiv:2601.22227v1 Announce Type: new Abstract: We present an analysis of spectral energy distributions (SEDs), galaxy light profiles, and visual morphological classifications for 194 X-ray luminous AGN (intrinsic absorption-corrected log10 LX(0.5 to 7 keV) less than 42.5, with a maximum of 45.2 ergs per second) at red... | https://arxiv.org/abs/2601.22227 | Academic Papers | svg |
5ffc4ff05a54aa0080d6eb39f60a465745c6808dd4d00d0aa9b68c1cfc98cccc | 2026-02-02T00:00:00-05:00 | Observational Implications of Cosmic Ray-Inverse Compton 'Boosted' Cool Cores in Clusters | arXiv:2601.22229v1 Announce Type: new Abstract: X-ray luminous cool-core (CC) galaxy clusters contain powerful cosmic ray (CR) sources. High-energy CRs powering GHz synchrotron lose energy rapidly, but long-lived (~Gyr-old) populations of 0.1-1 GeV CRs persist, propagating to ~100 kpc distances and radiating via invers... | https://arxiv.org/abs/2601.22229 | Academic Papers | svg |
7395541a29007bce1b3c15a7ade823f646f1c4dae736c3a019899a713b390ed2 | 2026-02-02T00:00:00-05:00 | The LBT $Y_{\rm p}$ Project I: An Improved Determination of the Primordial Helium Abundance -- Project Description, Sample Selection, Observations, and Methodology | arXiv:2601.22232v1 Announce Type: new Abstract: Extremely low metallicity HII regions have been observed with the goal of determining the primordial helium abundance ($Y_{\rm p}$). $Y_{\rm p}$, combined with standard big bang nucleosynthesis and the half-life of the neutron, provides a direct measurement of the number ... | https://arxiv.org/abs/2601.22232 | Academic Papers | svg |
5bff22812f819389106bc29eb0401456c215cca8c4a1fe3dabb844fb3dbd547d | 2026-02-02T00:00:00-05:00 | The LBT $Y_{\rm p}$ Project II: MODS Spectra, Physical Conditions, and Oxygen Abundances in Local Metal-Poor Nebulae | arXiv:2601.22236v1 Announce Type: new Abstract: Empirically measuring the primordial He mass fraction, $Y_{\rm p}$, requires a significant number of low-metallicity nebulae with direct constraints on He/H and O/H abundances. This technique requires high-fidelity measurements of the gas-phase physical conditions, namely... | https://arxiv.org/abs/2601.22236 | Academic Papers | svg |
001ebb4d338f567e6b323a51f51bff80c15c48fefac0c0a75c77817be909851c | 2026-02-02T00:00:00-05:00 | The LBT $Y_{\rm p}$ Project III: LUCI Spectra of Metal-Poor Nebulae | arXiv:2601.22237v1 Announce Type: new Abstract: Accurately determining the elemental abundances of a low metallicity nebula strongly depends on measuring the density (n$_e$) and temperature (T$_e$) of the gas. Because these two parameters are inherently degenerate when derived solely from H and He recombination lines, ... | https://arxiv.org/abs/2601.22237 | Academic Papers | svg |
3586fd239d936d27f1ff942f934419fe00b0a7a1a9a11ce8e07971dca3c91f31 | 2026-02-02T00:00:00-05:00 | The LBT Y$_\mathrm{p}$ Project IV: A New Value of the Primordial Helium Abundance | arXiv:2601.22238v1 Announce Type: new Abstract: We present a new determination of the primordial helium abundance based on new, high-quality Large Binocular Telescope (LBT) observations of 54 metal-poor H II regions. These regions have been observed and analyzed uniformly. We also describe a number of updates to our me... | https://arxiv.org/abs/2601.22238 | Academic Papers | svg |
a95625ced68dc24b68d0d3dea34a55393976a149bc98fc125ad48cb12de26513 | 2026-02-02T00:00:00-05:00 | The LBT $Y_{\rm p}$ Project V: Cosmological Implications of a New Determination of Primordial $^4$He | arXiv:2601.22239v1 Announce Type: new Abstract: The primordial abundance of $^4$He plays a central role in big-bang nucleosynthesis (BBN) and in the cosmic microwave background (CMB). The LBT $Y_{\rm p}$ Project's new measurement of the primordial $^4$He mass fraction $Y_{\rm p} =0.2458 \pm 0.0013$ is the most precise ... | https://arxiv.org/abs/2601.22239 | Academic Papers | svg |
4cb538913e8491fd8fba301ac760aaa9eafa368de7899443eddcbdf1c1df7f72 | 2026-02-02T00:00:00-05:00 | Mapping dark matter in the Bullet Cluster using JWST imaging and spectroscopy | arXiv:2601.22245v1 Announce Type: new Abstract: We present an updated gravitational lens model of the Bullet cluster (1E 0657-56) by combining JWST NIRCam imaging and NIRSpec spectroscopy. Although previous lens models relied on many multiply imaged galaxies, only six systems had spectroscopic redshifts prior to this w... | https://arxiv.org/abs/2601.22245 | Academic Papers | svg |
3d4df9501c12210d1581cfdf0267e65c3e4058f8ef7058b304410fc22fc4dfe1 | 2026-02-02T00:00:00-05:00 | X-Ray Analysis of an Off-Axis Merger Stage Binary Galaxy Cluster: PSZ2 G279.79+39.09 | arXiv:2601.22251v1 Announce Type: new Abstract: We present an X-ray analysis of the merging galaxy cluster system PSZ2 G279.79+39.09 ($z=0.29$) using archival XMM-Newton and Chandra observations. The surface brightness image is bimodal, elongated east-west with a projected core separation of $\sim 1.35$ Mpc. We measure... | https://arxiv.org/abs/2601.22251 | Academic Papers | svg |
a5d5257a49b5e7c65b11de0e209fd9d2884dfca6b4f238e75e08b5ad6aa54f60 | 2026-02-02T00:00:00-05:00 | Fast, dust-poor outflows in the local candidate dual AGN MCG-03-34-64 observed with VLT/ERIS | arXiv:2601.22254v1 Announce Type: new Abstract: We present VLT/ERIS IFU J-band observations of MCG-03-34-64, a nearby (z = 0.0167) Seyfert galaxy hosting a candidate dual AGN system with a separation of ~100 pc between the nuclei. The observations cover, among others, the HeI1.083um, [FeII]1.257um and Pa$\beta$ emissio... | https://arxiv.org/abs/2601.22254 | Academic Papers | svg |
f13f0bf123cf4e1b85e7f09c2daadc3ea7ef568b23842e49ecebe224cb16dc6f | 2026-02-02T00:00:00-05:00 | High energy neutrinos from pulsar-powered optical transients: LFBOTs as potential origin of the KM3NeT event KM3-230213A | arXiv:2601.22266v1 Announce Type: new Abstract: Recently, the KM3NeT Collaboration reported the detection of an ultra-high energy ($\sim 220$ PeV) neutrino event, KM3-230213A. In this work, we perform a detailed investigation into whether this event could originate from the diffuse neutrino flux produced by a class of ... | https://arxiv.org/abs/2601.22266 | Academic Papers | svg |
a54e420f4bf4afb84524c70a43b3390eab19d0fd583a4c058660d86c76567679 | 2026-02-02T00:00:00-05:00 | Tensions in Cosmology: Interpreting Them Through Inhomogeneous Models | arXiv:2601.22278v1 Announce Type: new Abstract: We review a subset of the current tensions affecting the standard $\Lambda$CDM cosmological model, emphasizing the role of chronic systematics and significance inflation in shaping their interpretation. As a unifying framework, we consider the spherically symmetric inhomo... | https://arxiv.org/abs/2601.22278 | Academic Papers | svg |
f9831e9fd1f9be0393f0d5f77cbb2cfea6d7a474fffd4452b0b668c88661ba5f | 2026-02-02T00:00:00-05:00 | Editorial: Mass and Angular Momentum Transport of Rapidly Rotating Hot Stars | arXiv:2601.22281v1 Announce Type: new Abstract: This dedicated journal collection will present and discuss a variety of science cases that can be used to extend our knowledge of massive stars and the influence of their rapid rotation on their subsequent evolution. The aim is to build understanding of this pivotal class... | https://arxiv.org/abs/2601.22281 | Academic Papers | svg |
ac887cd5e806118857b5047b1af16d2945a693be5aea02b1d6f08c07c47cad64 | 2026-02-02T00:00:00-05:00 | Testing the Association of Supermassive Black Hole Infrared Flares and High-energy Neutrinos | arXiv:2601.22309v1 Announce Type: new Abstract: The physical origin of the observed cosmic neutrinos remains an open question and the subject of active research. While matter accretion onto supermassive black holes is long thought to accelerate particles to high energies, it has recently been suggested that tidal disru... | https://arxiv.org/abs/2601.22309 | Academic Papers | svg |
dc35d131f89d1411753523a291bac4c5805248bfaf3683c9648d084ab17bc757 | 2026-02-02T00:00:00-05:00 | How isotropic is dark energy? | arXiv:2601.22351v1 Announce Type: new Abstract: Tensions in late-time expansion data have renewed interest in models beyond $\Lambda$CDM. We ask: \emph{how isotropic must dark energy be?} Working in Bianchi~I, we allow time-dependent anisotropic stress and introduce a parameterisation that enforces a vanishing line-of-... | https://arxiv.org/abs/2601.22351 | Academic Papers | svg |
d589f2cd805d1763a43af75194a2d85af8c9b45340392dcc4cddbcee9fc0ea49 | 2026-02-02T00:00:00-05:00 | Unveiling BLR Structure in AGN with High Resolution X-Ray Spectra: An Analytic Approach to Wind Emission Line Profiles | arXiv:2601.22392v1 Announce Type: new Abstract: XRISM has provided an unprecedented view of the emission and absorption lines in the X-ray. Notably, early results showed significant complexity to the Fe-K$\alpha$ line profile in AGN, with clear contributions from at least three emitting structures: an inner disc, inter... | https://arxiv.org/abs/2601.22392 | Academic Papers | svg |
fe7fdd10568040af4cb1def8aafbc9f123e5eaebd4bc0c29e4f3447d5771d562 | 2026-02-02T00:00:00-05:00 | Older Ages for 23 Pre-Main Sequence Stars in Upper Scorpius Using Dynamical Mass-Constrained Stellar Evolutionary Models | arXiv:2601.22423v1 Announce Type: new Abstract: We present revised stellar ages for 23 pre-main sequence K- and M-type stars in the Upper Scorpius star-forming region, derived by using stellar dynamical masses to constrain isochronal ages from five pre-main sequence stellar evolutionary models. We find that mass-constr... | https://arxiv.org/abs/2601.22423 | Academic Papers | svg |
157b11d180bf3d73dec0b79a3b3c747f96cb3710d655bad2b4f7824963f75627 | 2026-02-02T00:00:00-05:00 | Constructing a gravitational wave analysis pipeline for extremely large mass ratio inspirals | arXiv:2601.22464v1 Announce Type: new Abstract: Extremely large mass-ratio inspirals (XMRIs), consisting of a brown dwarf orbiting a supermassive black hole, emit long-lived and nearly monochromatic gravitational waves in the millihertz band and constitute a promising probe of strong-field gravity and black-hole proper... | https://arxiv.org/abs/2601.22464 | Academic Papers | svg |
3328abbf4353f5e7d5a6d5dd6cd61843b344028cd869aabaade6c1ff79d6884a | 2026-02-02T00:00:00-05:00 | A Formation Crisis of Repeating Partial Tidal Disruption Events | arXiv:2601.22465v1 Announce Type: new Abstract: A number of candidate repeating partial tidal disruption events (rpTDEs) have been reported in recent years. If these events are confirmed, the high fraction of observed rpTDEs among all tidal disruption events (TDEs) is in tension with prediction of the loss cone channel... | https://arxiv.org/abs/2601.22465 | Academic Papers | svg |
c8918a787febfde4fd656cb49837d668630bbdb46078b89a144f1cb09b10182a | 2026-02-02T00:00:00-05:00 | SED and Galactic kinematic diagnostics for dormant BH/NS binary candidates | arXiv:2601.22490v1 Announce Type: new Abstract: The third data release of the Gaia mission (Gaia DR3) has enabled large-scale searches for dormant black hole and neutron star binaries with stellar companions at wide separations. A recent study has proposed thousands of dormant black hole and neutron star binary candida... | https://arxiv.org/abs/2601.22490 | Academic Papers | svg |
2d2b6f6ba9059fef343e0b947d0a4ae2f7c77b4c5e2e20fd95e2b67f294e1d8a | 2026-02-02T00:00:00-05:00 | The GECKOS Survey: Extraplanar ionised gas in star-forming galaxies from eDIG to galaxy-scale winds | arXiv:2601.22500v1 Announce Type: new Abstract: We map the extraplanar gas, with $\sim$50-200 pc resolution, in nine star-forming galaxies using Multi-Unit Spectroscopic Explorer (MUSE) observations from the GECKOS VLT Large Program targeting edge-on galaxies with similar stellar mass as the Milky Way. The narrow range... | https://arxiv.org/abs/2601.22500 | Academic Papers | svg |
b9ba8159b80c6dfbd6586820a15c648db906983f6eaa8696ff324434dd9e756f | 2026-02-02T00:00:00-05:00 | Probing Star-Forming Properties via ALMA Observations of Massive Protocluster IRAS 15596-5301 | arXiv:2601.22618v1 Announce Type: new Abstract: To deepen our understanding of star-forming properties, we studied a massive protocluster IRAS 15596-5301 using ALMA 870 um and 3 mm data. High-resolution 870 um data reveal 34 dense cores, including 3 hot molecular cores, with subsequent line surveys detecting 22 molecul... | https://arxiv.org/abs/2601.22618 | Academic Papers | svg |
d25a871710f66eee8629988039ce4e374b80dcef7df347d5cdb4f2913c61df94 | 2026-02-02T00:00:00-05:00 | The size-velocity dispersion relationship of Galactic HII regions | arXiv:2601.22656v1 Announce Type: new Abstract: The size-velocity dispersion ($\sigma$) relation, while well established for giant HII regions, remains uncertain for their smaller counterparts (physical radii R 0.5 Myr), matter-bounded HII regions, a clear correlation emerges, implying that expansion-driven processes b... | https://arxiv.org/abs/2601.22656 | Academic Papers | svg |
6bba5048eb73e9e10633ddf2431c851e7805f0da806d4c6d6ad46fba4e4f7a22 | 2026-02-02T00:00:00-05:00 | The accretion-ejection connection in the asymmetric Th 28 jet revealed by MUSE-NFM | arXiv:2601.22658v1 Announce Type: new Abstract: Mass loss through stellar jets is closely tied to the process of accretion through the disk. Understanding phenomena such as episodic ejections and outflow asymmetries can thus shed light on the mechanism of jet launching and its connection to both mass accretion and the ... | https://arxiv.org/abs/2601.22658 | Academic Papers | svg |
c32c3ddf57477e13cd5b69c0562ecf02f9c65b73f2b273bf6a5272c237a9fe5d | 2026-02-02T00:00:00-05:00 | Distinguishing the nature of dark matter by mapping cosmic filaments from Lyman-alpha emission | arXiv:2601.22677v1 Announce Type: new Abstract: The standard $\Lambda$CDM cosmological model predicts that cosmic filaments are highly clumpy, whereas warm dark matter -- invoked to address small-scale challenges in $\Lambda$CDM -- produces filaments that are noticeably smoother and less structured. In this work, we in... | https://arxiv.org/abs/2601.22677 | Academic Papers | svg |
6195b80d6a4b474449f984817208bc5e0d1a3a057aecf90f13d886ca61ef8931 | 2026-02-02T00:00:00-05:00 | On the dynamics of magnetoviscous warped discs around compact objects | arXiv:2601.22683v1 Announce Type: new Abstract: Accretion discs that are tilted with respect to their compact hosts can warp out-of-plane through general relativistic frame-dragging. Warp influences disc dynamics in ways that have been studied extensively, especially as regards instabilities that might lead to rapid an... | https://arxiv.org/abs/2601.22683 | Academic Papers | svg |
64f189dd11464bf1644e809713ac1849ded7c6cd61174de3cd45214fcc7aa545 | 2026-02-02T00:00:00-05:00 | Apsidal motion and TESS light curves of two southern eclipsing binaries with high eccentricity: V1647 Sgr and V2283 Sgr | arXiv:2601.22715v1 Announce Type: new Abstract: The study of apsidal motion rates in eccentric eclipsing binaries provides an important observational test of theoretical models of stellar structure and evolution. Precise physical parameters of the stellar components together with systematic measurements of the periastr... | https://arxiv.org/abs/2601.22715 | Academic Papers | svg |
340492263ab25cfb41fdd0b2f89a1478c5f39acb554a175ab4c870c6f500cae3 | 2026-02-02T00:00:00-05:00 | A unified framework for hot accretion flows with finite angular momentum: from Bondi-like to disc-like regimes | arXiv:2601.22726v1 Announce Type: new Abstract: Observations of X-ray luminous elliptical galaxies suggest that the accretion rate onto the central supermassive black hole can reach a substantial fraction of the Bondi rate. However, classical accretion theory applicable to such hot accretion flows treats spherically sy... | https://arxiv.org/abs/2601.22726 | Academic Papers | svg |
ff9211d540275813037bc4f28d004a32c0fcc49c839a394498c759e4ba5a70f4 | 2026-02-02T00:00:00-05:00 | Detection of an Extremely Luminous Radio Counterpart to the Be/X-ray Binary A0538-66 | arXiv:2601.22741v1 Announce Type: new Abstract: We present the discovery of radio emission from the Be/X-ray binary A0538-66 with the Australian Square Kilometre Array Pathfinder (ASKAP), and results from a subsequent weekly monitoring campaign with the MeerKAT radio telescope. A0538-66, located in the Large Magellanic... | https://arxiv.org/abs/2601.22741 | Academic Papers | svg |
341b7f8aeda04e8578ab7e2daacbef2cb6604ecb0700fa2f258c3735b19b4422 | 2026-02-02T00:00:00-05:00 | Ultra-High Energy Cosmic Rays from the Galactic Center | arXiv:2601.22747v1 Announce Type: new Abstract: It is shown that Eddington-like accretion event in the Galactic center several million years ago and particle acceleration at accompanying shocks and jets could explain the observed cosmic ray spectrum at energies above 1 PeV. Cosmic ray particles are confined in extended... | https://arxiv.org/abs/2601.22747 | Academic Papers | svg |
d4e61cce4fa97421965379947023a7f1604c470530729b3c33bce77362456355 | 2026-02-02T00:00:00-05:00 | Prediction of multi-wavelength emissions associated with X-ray flare and extended emission of GRBs | arXiv:2601.22749v1 Announce Type: new Abstract: Gamma-ray bursts (GRBs) are one of the most extreme transients in the universe, but their explosion and emission mechanism remains unclear. To investigate the nature of GRB jets, here we focus on X-ray flares (XFs) and extended emissions (EEs), which are X-ray emissions t... | https://arxiv.org/abs/2601.22749 | Academic Papers | svg |
4b04536bb79986962f29873e0bca405e0265fab0721a3207eba17ba806bbe879 | 2026-02-02T00:00:00-05:00 | Statistical study for binary star evolution in dense embedded clusters | arXiv:2601.22767v1 Announce Type: new Abstract: Context: The dynamical evolution of binary populations in embedded star clusters shapes the statistical properties of binaries observed in the Galactic field. Accurately modelling this process requires resolving both early cluster dynamics and binary interactions. Aims: W... | https://arxiv.org/abs/2601.22767 | Academic Papers | svg |
5975b9f969a2f828e2eccc1a645af9fb3b8d2b030519a577e5ffdfd6e7f9328d | 2026-02-02T00:00:00-05:00 | Approximation of the reception coefficients of cosmic rays neutron component for latitude measurement | arXiv:2601.22810v1 Announce Type: new Abstract: When solving scientific and applied problems, such as latitude monitoring, it is important to correctly exclude primary cosmic ray variations from observation data. Therefore, the purpose of this study was to develop and implement a method for correcting monitoring data, ... | https://arxiv.org/abs/2601.22810 | Academic Papers | svg |
c111931988a5388971fce100b263768bbfd5b5b92125f07aff128c289125f896 | 2026-02-02T00:00:00-05:00 | Operational Solar Flare Forecasting System Using an Explainable Large Language Model | arXiv:2601.22811v1 Announce Type: new Abstract: This study focuses on forecasting major (>=M-class) solar flares that can severely impact the near-Earth environment. We construct two types of datasets using the Space Weather HMI Active Region Patches (SHARP), and develop a flare prediction network based on large langua... | https://arxiv.org/abs/2601.22811 | Academic Papers | svg |
c09a425f622e8ac3aaf9032632d355bb33412d3012af9031ea1ad995db4ae9a2 | 2026-02-02T00:00:00-05:00 | The SPIRou Legacy Survey: Detection of a nearby world orbiting in the habitable zone of Gl725B achieved by correcting strong telluric contamination in near-infrared radial velocities with WAPITI | arXiv:2601.22815v1 Announce Type: new Abstract: M dwarfs are prime targets in the search for exoplanets because of their prevalence and because low-mass planets can be better detected with radial velocity (RV) methods. In particular, the near-infrared (NIR) spectral domain offers an increased RV sensitivity and potenti... | https://arxiv.org/abs/2601.22815 | Academic Papers | svg |
b3854d7b2900387309493248187328e8237a5366c2e7d0bce1f8e899942c4255 | 2026-02-02T00:00:00-05:00 | X-ray Spectroscopy of Disk Winds in Black Hole X-ray Binaries | arXiv:2601.22836v1 Announce Type: new Abstract: Powerful outflows along the accretion disk, known as disk winds, are sometimes launched in black hole X-ray binaries. These winds often manifest themselves in X-ray spectra as blueshifted, highly ionized absorption lines. Previous observations suggest that the mass loss r... | https://arxiv.org/abs/2601.22836 | Academic Papers | svg |
a95fd62f6343e1c48b74072c12786ddeac7bcca1f5fafc02dcaf85bbab22c7c8 | 2026-02-02T00:00:00-05:00 | MAGAZ3NE: Dust Deficiency in Ultramassive Quiescent Galaxies at $3<z<4$ with ALMA Observations | arXiv:2601.22844v1 Announce Type: new Abstract: A major challenge in identifying massive quiescent galaxies at $z>3$ is distinguishing truly passive systems from dust-obscured star-forming galaxies, as both populations exhibit similar red ultraviolet (UV)-to-near-infrared (NIR) colors. In this work, we present ALMA Ban... | https://arxiv.org/abs/2601.22844 | Academic Papers | svg |
1bfa4ddb189846abd6261e158020327fe616910250dcbf596761871c184fd086 | 2026-02-02T00:00:00-05:00 | Equatorially Asymmetric Magnetic Fields and Their Impact on Black Hole Accretion Dynamics | arXiv:2601.22894v1 Announce Type: new Abstract: We investigate the impact of equatorial asymmetry in the magnetic field geometry on accretion dynamics around a spinning black hole using axisymmetric general relativistic magnetohydrodynamic simulations. We consider a Fishbone--Moncrief torus orbiting a Kerr black hole w... | https://arxiv.org/abs/2601.22894 | Academic Papers | svg |
e5dc2cfabff4ef619b69d9e195207c51fc14760f1c6ede1a9cfa9f0e26a58bbd | 2026-02-02T00:00:00-05:00 | QSOFEED: Investigating warm molecular, low- and high-ionization atomic gas in six type-2 quasars with GTC/EMIR | arXiv:2601.22906v1 Announce Type: new Abstract: We present long-slit near-infrared spectroscopic observations of six nearby (z$\sim$0.1) radio-quiet type-2 quasars (QSO2s) from the Quasar Feedback (QSOFEED) sample. They have bolometric luminosities of $10^{45-46}~erg~s^{-1}$ and stellar masses of $ 10^{10.6-11.3}~M_{\o... | https://arxiv.org/abs/2601.22906 | Academic Papers | svg |
9e869da7161329cfc3e5043aad1db25ac33e5cee3f4efad6953abeb392e5903c | 2026-02-02T00:00:00-05:00 | The Bondi universe: How negative mass drives the cosmological expansion | arXiv:2601.22910v1 Announce Type: new Abstract: We identify a new cosmological coincidence that parallels the well-known matter/dark-energy coincidence: the present-epoch transition of the universe from a weakly coupled (collisionless) to a strongly coupled (collisional) gravitational regime. Within a cosmological mode... | https://arxiv.org/abs/2601.22910 | Academic Papers | svg |
cc1e15be1297fb75ad6364db29bfe310dec3a28c7d64eddff49e1aadd37c0123 | 2026-02-02T00:00:00-05:00 | Linear perturbation theory and structure formation in a Brans-Dicke theory of gravity without dark matter | arXiv:2601.22937v1 Announce Type: new Abstract: We investigate the formation of the large-scale cosmic structure in a scalar-tensor theory of gravity belonging to the class of the Brans--Dicke theories. The universe contains baryonic matter alone and neither dark matter nor dark energy. The two arbitrary functions of t... | https://arxiv.org/abs/2601.22937 | Academic Papers | svg |
7a2bfe93d41251380a3b9357316415c2e63cb627999f8af1b85582d0559c000f | 2026-02-02T00:00:00-05:00 | G183: An outer galaxy filament feeding a massive protostar | arXiv:2601.22972v1 Announce Type: new Abstract: We present the first detailed multi-tracer observation of a 5-pc long outer Galaxy filament, G183, and the massive young stellar object (YSO) IRAS 05480+2545 associated with it. Using the IRAM 30-m telescope at lambda = 1.4 and 3 mm, we probed the molecular gas distributi... | https://arxiv.org/abs/2601.22972 | Academic Papers | svg |
d46c2407368c0fd7435c9d079e2d58cba14e427b276cee2dab5cd542d21f749c | 2026-02-02T00:00:00-05:00 | Seeds of supermassive black holes in general relativistic and alternative cosmologies: Implications of massive seeds | arXiv:2601.22991v1 Announce Type: new Abstract: Presence of supermassive black holes (SMBHs) with mass $(10^{6}-10^{9}) M_{\odot}$ at $z = 10$ has been recently revealed by James Webb Space Telescope (JWST) observations. In this study we generate seeds for the above range of SMBHs in various background cosmologies. We ... | https://arxiv.org/abs/2601.22991 | Academic Papers | svg |
f81dbbcb36f4b6ded704791e21b8ba5e8578a5603efc5abb64dad376164c664c | 2026-02-02T00:00:00-05:00 | Contrastive Learning of Extragalactic Stellar Streams: Sculpting a Latent Space of Representations with DES DR2 Photometry | arXiv:2601.23013v1 Announce Type: new Abstract: We present a self-supervised approach for characterizing low surface brightness tidal features in wide-field imaging data by applying the nearest-neighbor contrastive learning of visual representations (NNCLR) algorithm to a curated subset of the Dark Energy Survey Data R... | https://arxiv.org/abs/2601.23013 | Academic Papers | svg |
fd6bd7c1f39b64fa8a5b0a1d5342151a88f3c7fc3989d5b0c5489b5e3895b0d6 | 2026-02-02T00:00:00-05:00 | Stereoscopic Observations of Solar X-ray Sources Explained by a Data-Constrained Magnetohydrodynamic Simulation | arXiv:2601.23046v1 Announce Type: new Abstract: We investigated the three-dimensional (3D) magnetic structures and dynamics responsible for particle acceleration in an X7.1-class flare that occurred on October 1, 2024, in NOAA active region 13842. We combined stereoscopic hard X-ray (HXR) observations from the Advanced... | https://arxiv.org/abs/2601.23046 | Academic Papers | svg |
70f3ffeb1a32b862ee9bad23dd4d6e5a8f37e06c91d22f41762a047565aa2e6b | 2026-02-02T00:00:00-05:00 | Quantifying the C/O ratio in the planet-forming environments around very-low-mass stars | arXiv:2601.23069v1 Announce Type: new Abstract: The material in planet-forming disks determines the composition of planets; hence, it is crucial to understand the physical and chemical processes that set the abundance and distribution of key volatiles. James Webb Space Telescope observations of disks around very-low-ma... | https://arxiv.org/abs/2601.23069 | Academic Papers | svg |
97b744f33df72ce183715b0e248a07fc136908dfc424c71a986e57e61c70beb7 | 2026-02-02T00:00:00-05:00 | Rediscussion of eclipsing binaries. Paper XXVIII. The metallic-lined system DV Bootes | arXiv:2601.23145v1 Announce Type: new Abstract: DV Boo is a detached eclipsing binary containing a metallic-lined A-star and a chemically normal late-F star, in an orbit with a period of 3.783 d and a possible slight eccentricity. We use a light curve from the Transiting Exoplanet Survey Satellite (TESS) and published ... | https://arxiv.org/abs/2601.23145 | Academic Papers | svg |
41b4c1e3aa00ac583243b754412bdcfd8fbd162705d0d5a6c71f7dc8bd379ca4 | 2026-02-02T00:00:00-05:00 | Inhibiting Conduction by He Mixing in Interiors of Jupiter and Saturn | arXiv:2601.23152v1 Announce Type: new Abstract: Accurate knowledge of the electrical and thermal conductivities and structural properties of hydrogen-helium mixtures under thermodynamic conditions within and beyond the immiscibility range is very important to predict the thermal evolution and internal structure of gas ... | https://arxiv.org/abs/2601.23152 | Academic Papers | svg |
601684ca1e88fa688be7e6a268aed6379baad7e5eed08fa6a8dcad0b3673733a | 2026-02-02T00:00:00-05:00 | The Simons Observatory: On-sky performance of radio-transparent multi-layer insulation (RT-MLI) using Styroace-II Styrofoam | arXiv:2601.23168v1 Announce Type: new Abstract: We present the on-sky performance of a Radio-Transparent Multi-Layer Insulation filter (RT-MLI) that uses Styroace-II styrofoam to reject ambient thermal radiation from entering a 0.42 m diameter aperture to a sub-100 mK bolometric detector array cooled by a dilution-refr... | https://arxiv.org/abs/2601.23168 | Academic Papers | svg |
704ce0848e6015dbb08dae5dc7f9006bf1ab86140e99ec55f36a19c2b0b741c9 | 2026-02-02T00:00:00-05:00 | HEP digital micromirror devices for precision solar spectroscopy | arXiv:2601.23176v1 Announce Type: new Abstract: We present the motivation and early tests for a novel solar instrument that will harness the new High Efficiency Pixel (HEP) Texas Instruments DLP801RE Digital Micromirror Device (DMD) as a reconfigurable spatial light modulator. This design enables real-time, dynamic con... | https://arxiv.org/abs/2601.23176 | Academic Papers | svg |
3616fbafc255e95f09a94ba7056173223e0430dd7669354d6178cf6aadb88b4b | 2026-02-02T00:00:00-05:00 | Sunspot simulations with MURaM -- I. Parameter study using potential field initial conditions | arXiv:2601.23189v1 Announce Type: new Abstract: Context. Existing sunspot simulations fail to reproduce the observed magnetic field distribution due to an artificially increased $B_{hor}$ at the upper boundary. Aims. We explore alternative ways to better reproduce the magnetic and dynamic properties of observed sunspot... | https://arxiv.org/abs/2601.23189 | Academic Papers | svg |
16bc52e96aab4c26ecb0f0fa2474aa388daca81f7dc7a6d5de801e9d77ab3422 | 2026-02-02T00:00:00-05:00 | The Effect of Tidal Heating and Volatile Budgets on the Outgassed Atmosphere of 55 Cancri e | arXiv:2601.23235v1 Announce Type: new Abstract: 55 Cancri e is a $\sim$8 Gyr rocky world (1.95 $R_\oplus$, 8.8 $M_\oplus$) orbiting a K-type star. JWST observations suggest a carbon-dominated atmosphere (CO$_2$/CO) over a global magma ocean ($>$3000 K). We suggest that any CO$_2$-dominated atmosphere, with trace H$_2$O... | https://arxiv.org/abs/2601.23235 | Academic Papers | svg |
3f24e56bdfe377d4364cebf4115175a0300c07934014ff5e7e92fb7d41e1f34b | 2026-02-02T00:00:00-05:00 | Physical origin of very-high-energy gamma rays from the low-luminosity active galactic nucleus NGC 4278 and implications for neutrino observations | arXiv:2601.23242v1 Announce Type: new Abstract: Relativistic jets in active galactic nuclei (AGNs) are known to accelerate particles to extreme energies, yet the physical origin of very-high-energy (VHE) emission from low-luminosity AGNs (LL AGNs) remains unclear. NGC 4278, a local LLAGN, has recently been identified a... | https://arxiv.org/abs/2601.23242 | Academic Papers | svg |
796b6af1f553596f421955576adf425dcc8a345737de5901705c4c60552539bd | 2026-02-02T00:00:00-05:00 | Too many or too massive? Investigating the high-$z$ demography of active SMBHs from JWST | arXiv:2601.23250v1 Announce Type: new Abstract: Recent JWST observations have unveiled a numerous population of low-luminosity active galactic nuclei (AGN) at $4 5.5$. Continuity-equation modelling shows that initially high $M_{\rm BH}-M_{*}$ relations predict a strong two-phase evolutionary scenario and very steep low... | https://arxiv.org/abs/2601.23250 | Academic Papers | svg |
342fc481a8de49d58d3c4aeaa248cea4514510a07d9527be271d001c1dd2b00e | 2026-02-02T00:00:00-05:00 | Evolution of Supermassive Black Hole Pairs on Inclined Orbits in Post-Merger Galaxies | arXiv:2601.23260v1 Announce Type: new Abstract: Theoretical models of the evolution of supermassive black hole (SMBH) pairs in post-merger remnant galaxies are necessary to motivate observational searches for dual active galactic nuclei (AGN) and gravitational wave sources. Studies have explored the dynamical evolution... | https://arxiv.org/abs/2601.23260 | Academic Papers | svg |
3d016f82fb76d57e2e32fd6dfd4f4914b3ffe3f2436971610f0d5fed504d5b15 | 2026-02-02T00:00:00-05:00 | MARVELously Dark: the gravothermal evolution of dwarf halos in velocity-dependent SIDM | arXiv:2601.23264v1 Announce Type: new Abstract: Self-interacting dark matter (SIDM) with a sufficiently large cross section has been shown to naturally produce constant dark matter (DM) cores, as well as core-collapse, at the centers of dwarf halos on cosmic timescales, potentially reducing tensions with observation. H... | https://arxiv.org/abs/2601.23264 | Academic Papers | svg |
886b7dc6e0daa87b8138547d85f2fc802015f13d81574f8caf62dd42c613a380 | 2026-02-02T00:00:00-05:00 | PDRs4All: XVIII. The evolution of the PAH ionisation and PAH size distribution across the Orion Bar | arXiv:2601.23282v1 Announce Type: new Abstract: We investigate the evolution of the PAH population's charge state and size across key physical zones in the Orion Bar, which include the HII region, the atomic PDR (APDR), and three HI/H2 dissociation fronts (DF1, DF2, and DF3). Utilising the NASA Ames PAH Infrared Spectr... | https://arxiv.org/abs/2601.23282 | Academic Papers | svg |
88f3af5c03fe675843c2476d17189b28760ec27e8c421032be0827acdbfa0af0 | 2026-02-02T00:00:00-05:00 | Comparison of MOND and Verlinde's emergent gravity in dwarf spheroidals | arXiv:2601.01715v1 Announce Type: cross Abstract: We apply Modified Newtonian Dynamics (MOND) and Verlinde's emergent gravity separately to calculate the radial accelerations in 23 dwarf spheroidals. Then, we compare them with the observed radial accelerations. In our earlier work, we determined that, when the data set... | https://arxiv.org/abs/2601.01715 | Academic Papers | svg |
a2b04ba40cad21237a884e4377e323f5c1eb95bdcce0b81db8b7cbbb15b2d92e | 2026-02-02T00:00:00-05:00 | When inflationary perturbations refuse to classicalise: the role of non-Gaussianity in Wigner negativity | arXiv:2601.22219v1 Announce Type: cross Abstract: Inflationary perturbations are quantum in origin. Yet, when computing cosmological observables, they are often treated as classical stochastic fields. Do they nevertheless retain quantum birthmarks? A hallmark of genuinely quantum behaviour is quantum interferences, ari... | https://arxiv.org/abs/2601.22219 | Academic Papers | svg |
be433ff045a36ea6ff8c190b963d9e6d1f5484c59aab2763b4133804e9229f33 | 2026-02-02T00:00:00-05:00 | Axions on a Hyperbolic Ride: Geometric Suppression of CMB Isocurvature and a Blue-Tilted Spectrum | arXiv:2601.22221v1 Announce Type: cross Abstract: CMB limits on cold-dark-matter isocurvature are often interpreted as excluding the simultaneous realization of high-scale inflation and large QCD axion decay constants in pre-inflationary Peccei--Quinn (PQ) scenarios. We show that this conclusion can be evaded by exploi... | https://arxiv.org/abs/2601.22221 | Academic Papers | svg |
9bf2af7a814f2ca68cb45c00244c60ded8418d134b85b25a1c3b68497df69d19 | 2026-02-02T00:00:00-05:00 | A Maximum Entropy Conjecture for Black Hole Mergers | arXiv:2601.22388v1 Announce Type: cross Abstract: The final state of a binary black hole merger is predicted with high precision by numerical relativity, but could there be a simple thermodynamic principle within general relativity that governs the selection of the remnant? Using post-Newtonian relations between the ma... | https://arxiv.org/abs/2601.22388 | Academic Papers | svg |
b5de45c358fc0554e952e23e5bce0a27f89172ab4c4252740a159fba54f43c7b | 2026-02-02T00:00:00-05:00 | Nonlocal Corrections to Scalar Field Effective Action in de Sitter spacetime | arXiv:2601.22644v1 Announce Type: cross Abstract: We investigate the one-loop effective action for a test scalar field in a general Friedmann-Lema\^itre-Robertson-Walker (FLRW) background, specifically focusing on quantum corrections up to the second order in the interaction strength. By employing the Schwinger-Keldysh... | https://arxiv.org/abs/2601.22644 | Academic Papers | svg |
a33e390162e8b25bf04d6686b77c3c7a6082a91b7a8fb899f8c2584d0ef5d0ab | 2026-02-02T00:00:00-05:00 | Exact black holes and black branes with bumpy horizons supported by superfluid pions | arXiv:2601.22914v1 Announce Type: cross Abstract: We present exact solutions of the Einstein-$SU(2)$ non-linear sigma model in $3+1$ spacetime dimensions, describing bumpy black holes and black branes. Using an Ansatz for superfluid pion multi-vortices, the matter sector reduces to a first-order BPS system, while the E... | https://arxiv.org/abs/2601.22914 | Academic Papers | svg |
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