Novel thermodynamic topological subclass from inverse-temperature asymptoticsWe investigate the thermodynamic topology of the charged McGuigan--Nappi--Yost black hole in the canonical ensemble at fixed electric charge, identifying equilibrium black hole solutions as zeros of…Dejiang Yin, Qi-Qi Liang, Yu-Die Wan et al.·Oct 30, 2026SaveLearn
Probing Realistic Neutron Star Equations of State via the Chameleon MechanismWe investigate the impact of the Chameleon mechanism on structural properties of neutron stars adopting realistic nucleonic equations of state. The scalar-matter coupling parameter β controls the…Debadri Bhattacharjee, Grigorios Panotopoulos, Pradip Kumar Chattopadhyay·Oct 30, 2026SaveLearn
Probing dark sector with decihertz gravitational wave observations of compact binary inspirals in IndIGO-DWe investigate the potential of decihertz gravitational-wave (GW) observations of compact-binary inspirals to probe atomic dark matter (aDM) and its interactions through an ultralight massive dark…Divya Tahelyani, Abhishek Sharma, Anand S. Sengupta et al.·Oct 30, 2026SaveLearn
More Eccentric, Not Always Less Detectable: High Mass Holds Its Ground, Low Mass Loses ReachGravitational waves from eccentric compact binary coalescences trace dynamical binary formation, but matched-filtering searches responsible for most detections rely on quasicircular templates.…Elwin K. Y. Li, Juno C. L. Chan, Alvin K. Y. Li et al.·Oct 30, 2026SaveLearn
Remark About Action for Rastall GravityIn this short note we study Rastall gravity action as was proposed by Golovnev in [7]. We construct its reparametrization invariant form and determine corresponding equations of motion.J. Kluson·Oct 29, 2026SaveLearn
Dynamics of spinning test particles in the innermost stable circular orbit of an approximate Kerr-like spacetime with mass quadrupoleWe study the motion of spinning test particles in a deformed, rotating spacetime described by a metric perturbed up to second order in the mass quadrupole moment. We examine how the parameters of the…Cristian Herrera-Chaves, Francisco Frutos-Alfaro·Oct 29, 2026SaveLearn
Global and asymptotic properties of self-gravitating nonlinear sigma modelsWe present an analytical study of the global and asymptotic properties of static, spherically symmetric, asymptotically flat solutions in general relativity and its \(D\)-dimensional generalization…Oleksandr S. Stashko, Valery I. Zhdanov, Mark P. Hertzberg·Oct 29, 2026SaveLearn
Bounds on the minimum orbital period of general static spherical black holes: a sharp upper bound and a conditional lower boundWe investigate bounds on the minimum orbital period around four-dimensional general static spherical black holes. For all static spherically symmetric black holes with an event horizon, asymptotic…Yan Peng, Guohua Liu·Oct 29, 2026SaveLearn
Effects of Eddington-inspired Born-Infeld Gravity on Black Hole AccretionBlack holes offer a unique setting to test gravity in the strong-field regime, where deviations from General Relativity are expected to be most pronounced. We study how modified gravity changes the…Merce Guerrero, Razieh Ranjbar·Oct 29, 2026SaveLearn
Relating approaches to interacting quantum clocks and systemsThe problem of describing the dynamics of quantum systems relative to quantum clocks with which they interact is relevant to the physics of quantum reference frames and quantum gravity alike. There…Artur Semião, Leonardo Chataignier·Oct 29, 2026SaveLearn
Leaking Sound Waves: Gravitational Waves From Dark Sectors Weakly Coupled to the Standard ModelFirst-order phase transitions in a dark sector can produce an observable stochastic gravitational-wave background, and many models predicting such signals in current and future experiments have been…Marco Finetti, Helena Kolešová, Daniil Krichevskiy·Oct 29, 2026SaveLearn
Separation of variables for massive spin-2 fields on the Kerr black holeMassive spin-2 fields on the Kerr black hole generally obey coupled partial differential equations. We show that these equations separate through two commuting angular operators acting on five…Oscar J. C. Dias, Jorge E. Santos·Oct 29, 2026SaveLearn
Strong-deflection scaling in nearly symmetric thin-shell wormholesThe angular winding of a returning light ray can grow while the family of admissible impacts disappears. We characterize this competition near reflection symmetry in a static thin-shell wormhole…Jonathan A. Rebouças, Edson Otoniel·Oct 29, 2026SaveLearn
Thin-shell wormholes from magnetic black holes in exponential electrodynamicsTransparent magnetic wormholes can share a black hole exterior while their supporting matter controls the response of the throat. We construct symmetric thin shells from the magnetic black hole of…Jonathan A. Rebouças, Edson Otoniel, Muhammad Israr Aslam et al.·Oct 29, 2026SaveLearn
Gravitational-Wave Echoes and Greybody Cutoff from Logarithmic Throats at a Marginal-Trapping ThresholdWhen a static, spherically symmetric configuration is brought close to a marginal-trapping threshold, it develops a long throat. As the nondegenerate minimum of F=1-2m/r approaches zero,…Jahed Abedi·Oct 29, 2026SaveLearn
Anisotropic overlap reduction functions for arbitrary equal-arm TDI channels: A fully analytic framework and efficient evaluationWe establish a unified analytic framework for anisotropic overlap reduction functions (ORFs) of arbitrary finite-delay time-delay interferometry (TDI) channels in a static, reciprocal, equal-arm…Kun Zhou, Jin Li·Oct 29, 2026SaveLearn
Curvature Blindness: Material Inference in Stars and Black Hole CandidatesGravitational observations can leave material properties undetermined in two different ways: distinct states can have the same total source, and distinct spacetime histories can have the same…Jacob M. Krebs·Oct 29, 2026SaveLearn
Quasinormal-mode encounters: Pseudospectra near Kerr--Newman exceptional pointsExceptional points (EPs), at which two quasinormal frequencies and their eigenvectors coalesce, can enhance the spectral instability of black hole quasinormal modes. We investigate this behavior in…Kyriakos Destounis·Oct 29, 2026SaveLearn
Scalar--photon coupling in cosmology: Radiation evolution, recombination, and CMB signaturesInteractions between a cosmological scalar field and radiation can modify the pre-recombination expansion history and leave observable signatures in cosmic microwave background (CMB) anisotropies. We…Y Bisabr·Oct 29, 2026SaveLearn
Gravitational waves away from a Schwarzschild black hole: full spectrum analysisGravitational waves as one approaches Schwarzschild null infinity are the core of our investigation, treated as the spin-weighted generalisation of a massless scalar field. In particular, we compute…Marco Refuto, Giampiero Esposito·Oct 29, 2026SaveLearn
Rotation overcharges vectorized black holesA charged black hole has a ceiling: extremality bounds the charge that a given mass and spin can support. Vector hair has so far only lowered it. In the Einstein--Maxwell--Vector (EMV) model, where a…Shengjun Guo, Guangzai Ye, Peng Liu·Oct 29, 2026SaveLearn
Nonminimal Scalar-curvature Coupling Noncanonical Warm InflationWe investigate a noncanonical warm inflationary model with a nonminimal coupling between the inflaton field and scalar curvature. Within the Jordan frame, we derive the modified background equations…Zhi-Peng Peng, Shi-Chao Zhang, Xiao-Pei Xu et al.·Oct 29, 2026SaveLearn
Disentangling Spin-induced Precession vs. Eccentricity in GW190521 and GW231123We use the more than 2000 full numerical-relativity simulations included in the fifth release of the RIT binary-black-hole waveform catalog to perform Bayesian parameter estimation, via the rapid…Patricia McMillin, Giuseppe Ficarra, Carlos O. Lousto et al.·Oct 29, 2026SaveLearn
Photon Rings and Mass-Independent Observables of a Five-Dimensional Charged AdS Black HoleWe investigate the optical properties of a five-dimensional charged anti-de Sitter (AdS) black hole. Using the null geodesic equations, we determine the event horizon and photon sphere radii and the…Amrillokhon Mamatkhonov, Javokhir Sharipov, Tursunali Xamidov et al.·Oct 29, 2026SaveLearn
Curvature scaling and linear area response in charged black-hole interiorsWe identify the mechanisms and range of validity of two scaling laws reported in charged black-hole interiors. In spherical evolutions with a neutral massless scalar, mass inflation produces a large…Fu-Guo Yang·Oct 29, 2026SaveLearn