Charged black holes embedded in matter with anisotropic pressure: Horizon Structure and Quasinormal Mode SpectraIn realistic settings, black holes are expected to be embedded in astrophysical environments. These environments, including possible dark matter distributions, can modify observable properties of…D. N. Garzon, Jiayi Zhang, Elena Kopteva et al.·Jul 6, 2026SaveLearn
Degenerate and connection-dependent cosmological sectors in f(Q,C) gravityWe investigate cosmological solutions in f(Q,C) gravity formulated within symmetric teleparallel geometry, where gravitation is described by the nonmetricity scalar Q and the boundary term C,…Ismael Ayuso·Jul 6, 2026SaveLearn
Three-dimensional wave optics for weak-field lensing of gravitational wavesWe develop a perturbative Green's function approach to gravitational lensing by weak gravitational potentials that need not be localized on a thin lens plane and that applies in both the wave…Mariana Carrillo-González, Alan Heavens, Lorne Whiteway·Jul 6, 2026SaveLearn
Black Hole Black Boxes: Numerical Black Hole Metrics via AInstein Neural NetworksThe AInstein architecture introduced an unsupervised neural method for solving the Riemannian Einstein equations on arbitrary manifolds. This Physics Informed Neural Network approach (PINN) is…Tancredi Schettini Gherardini, Edward Hirst, Alexander George Stapleton·Jul 6, 2026SaveLearn
Finite signal-to-noise ratio bias in parameter estimation for damped oscillations: cautionary remark about catalog-level black-hole spectroscopyWe investigate biases in parameter estimation for damped oscillations motivated by applications to black-hole spectroscopy in gravitational-wave physics. Focusing on the simplest model of a…Koutarou Kyutoku·Jul 6, 2026SaveLearn
Structure of Anisotropic Magnetized Neutron Stars in f(R,T) Gravity with Realistic Equation of StateIn this study, within the framework of f(R,T) modified gravity, we investigate the influence of coupling parameter, magnetic field and anisotropy parameter on the neutron star structure. This work…M. Savari, G. H. Bordbar, J. Sedaghat et al.·Jul 6, 2026SaveLearn
Leading weak-field magnetic corrections to charged scalar quasinormal modes of Kerr black holes in the Melvin--Kerr geometryWe compute the leading magnetic corrections to the charged-scalar quasinormal-mode (QNM) spectrum of a Kerr black hole immersed in a weak external magnetic field, working in the Melvin--Kerr geometry…Haryanto M. Siahaan·Jul 6, 2026SaveLearn
Emergent cosmology and gravity from quantum time?Macroscopic observables allow the recovery of intrinsic dynamics from stationary quantum states. I show that, by interpreting the squared amplitude as the probability density for each definite value…Ovidiu Cristinel Stoica·Jul 6, 2026SaveLearn
A stepping stone toward detecting gravitational wave memory: a cumulative analysis with the full (=2, m=0) spherical harmonic using events from GWTC-4.0 and GWTC-5.0We perform Bayesian model selection to test for the presence of the (=2,m=0) spherical harmonic mode in gravitational wave events that have previously been identified as binary black hole…Maria Rosselló-Sastre, Sascha Husa, Yumeng Xu et al.·Jul 6, 2026SaveLearn
Chaotic particle dynamics near a traversable wormhole throatThis study investigates the nonlinear dynamics of a test particle near the traversable wormhole throat under an external harmonic potential. One-dimensional radial perturbation analysis shows that…Xin Zhao, Xing-Kun Zhang, Ya-Peng Hu et al.·Jul 6, 2026SaveLearn
Measurability of Quadrupole Deviations from Kerr in Binary black hole MergersWe investigate the measurability of black hole quadrupole deviations from Kerr using five binary black hole mergers observed by the LIGO-Virgo-KAGRA Collaboration with the beyond-general-relativity…Song Li, Wen-Biao Han·Jul 6, 2026SaveLearn
Rotating Fermion-Boson Stars in R-squared GravityFermion-boson stars are compact equilibrium configurations composed of ordinary fermionic matter and a bosonic dark component interacting only through gravity. Such systems provide a natural…Saeed Fakhry, Jorge Castelo Mourelle, Nicolas Sanchis-Gual et al.·Jul 6, 2026SaveLearn
Constraining inflationary models via de-Sitterization of Bianchi CosmologiesOur Universe is isotropic and homogeneous when we observe it on Mpc length scales. It is desirable that present state of the Universe has no dependence on its initial geometry. In case of…Apurba Samanta, Rahul Kothari·Jul 6, 2026SaveLearn
Neutron stars in f(Q) = Q +ξQ2 gravityModified theories of gravity based on the symmetric teleparallel framework have recently attracted considerable attention as viable alternatives to General Relativity. In this context, f(Q) gravity,…J. C. N. de Araujo, H. G. M. Fortes·Jul 6, 2026SaveLearn
The WDM Time-Frequency Transform in Gravitational-Wave Data Analysis I: FormalismFor slowly-varying noise, time-frequency methods offer a natural middle ground between the efficiency of the frequency domain and the generality of the more expensive time domain. Despite growing…Aaron Johnson, Katerina Chatziioannou, Jake Summers·Jul 6, 2026SaveLearn
Asymmetric quantum steering harvested near a Lorentz-violating BTZ black holeWe investigate the harvesting of quantum steering and its directional asymmetry between two Unruh-DeWitt detectors in a Lorentz-violating BTZ black hole spacetime. Since the detectors are located at…Si-Yu Liu, Xin-Ze Song, Xiang-Yue Yu et al.·Jul 6, 2026SaveLearn
Quantification of the parameter estimation error from Rotating Core Collapse supernovaeIn this paper, we perform parameter estimation with an analytical model to simulate the gravitational wave emission during the core bounce phase of a rapidly rotating core collapse supernova…Claudia Moreno, Javier M. Antelis, Michele Zanolin·Jul 6, 2026SaveLearn
Regular Black Holes in General Relativity from Nonlinear Electrodynamics with de Sitter CoresWe present new regular black hole solutions in general relativity (GR) within a static, spherically symmetric framework governed by a variable equation of state, following the approach of [Class.…A. A. Araújo Filho, Ednaldo L. B. Junior, José Tarciso S. S. Junior et al.·Jul 6, 2026SaveLearn
Improved Constraints on Non-Kerr Deviations from Binary Black Hole Inspirals Using GWTC-4 DataGravitational wave (GW) observations of binary black hole (BBH) mergers provide a unique opportunity to probe the nature of spacetime in the strong-field and dynamical regime. We present updated…Debtroy Das, Swarnim Shashank, Cosimo Bambi·Jul 6, 2026SaveLearn
Thermodynamics and phase transitions of κ-deformed Schwarzschild-AdS black holesWe investigate the thermodynamics of the Schwarzschild-AdS black hole in the framework of \(κ\)-deformed non-commutative geometry by constructing an effective \(κ\)-deformed Schwarzschild-AdS metric…A. Naveena Kumara, Vishnu Rajagopal, Puxun Wu·Jul 6, 2026SaveLearn
Big Bang revisitedThe Friedmann cosmological solution of the standard Einstein gravitational field equation has a curvature singularity at a moment in time known as the Big Bang. It has been suggested that this Big…Frans R. Klinkhamer·Jul 6, 2026SaveLearn
Totally geodesic null hypersurfaces and constancy of surface gravity in Finsler spacetimesWe define and study totally geodesic null hypersurfaces in Finsler spacetimes. We prove that the null convergence condition and a certain mild gravitational equation χα=0, imply the vanishing of…Ettore Minguzzi·Jul 6, 2026SaveLearn
Evolution of Linear Perturbations under Time-Dependent Hubble Friction I: SR-USR-SR InflationThe origin of the finite dip in the curvature power spectrum of instantaneous Slow-Roll (SR)-Ulta-Slow-Roll (USR)-SR inflation remains controversial at linear order, and its full spectral features…Wen Li, Chao Chen·Jul 6, 2026SaveLearn
Beyond general relativity: gravitational waves in non-minimally coupled theoriesNon-minimal couplings between matter and curvature tensors arise in many different contexts. Such couplings modify solutions of general relativity (GR) and therefore can be probed in various…Stephon Alexander, Tatsuya Daniel, Tucker Manton·Jul 6, 2026SaveLearn
Interferometric signature of higher-order images in a parametrized frameworkThis paper investigates gravitational lensing in the strong deflection limit, focusing particularly on higher-order images produced near compact objects such as black holes and their observable…Fabiano Feleppa, Fabio Aratore, Valerio Bozza·Jul 6, 2026SaveLearn