Can black holes evaporate past extremality?Black holes with sufficiently large initial charge and mass will Hawking-evaporate towards the extremal limit. The emission slows as the temperature approaches zero, but still reaches the point where…Samuel E. Gralla·Aug 7, 2026SaveLearn
Gravitational memory meets astrophysical environments: exploring a new frontier through osculationsWe study how dark matter environments influence nonlinear gravitational memory from intermediate-mass-ratio binaries. Incorporating environmental effects from the dark matter gravitational potential,…Rishabh Kumar Singh, Shailesh Kumar, Abhishek Chowdhuri et al.·Aug 7, 2026SaveLearn
Wigner's friend's black hole adventure: an argument for complementarity?At the heart of both black hole physics and Wigner's friend scenarios lies the question of unitarity. In Wigner's friend setups, sealed-lab measurements are modeled unitarily, probing the…Laurens Walleghem·Aug 7, 2026SaveLearn
Probing the massive scalar mode in the levitated sensor detector of gravitational waveOwing to the mass scale associated with it the scalar longitudinal polarization mode of gravitational wave predicted in various modified theories of gravity should propagate at a subluminal speed and…Rakesh Das, Anirban Saha·Aug 7, 2026SaveLearn
Optimal localization for the Einstein constraintsWe establish the existence of asymptotically Euclidean solutions, or initial data sets, to Einstein's vacuum constraints exhibiting both gravitational shielding and arbitrarily low decay. We…Bruno Le Floch, Philippe G. LeFloch·Aug 7, 2026SaveLearn
A causal magnetic black hole with finite self-energyWe construct a nonlinear electrodynamics (NLED) model for a static magnetic black hole. Rather than imposing a regular center, we require a Maxwell weak-field limit, finite magnetic self-energy, a…Mohsen Fathi, Ariel Guzmán, J. R. Villanueva·Aug 6, 2026SaveLearn
Ensemble-Based Residual Tests of GW231123 across Waveform ModelsGW231123 is an exceptional gravitational wave event for which different waveform models yield significantly different inferred source parameters. Residual tests provide a direct way to assess whether…Dicong Liang, Hai-Tian Wang, Junlin Qin et al.·Aug 6, 2026SaveLearn
Formation of the Kerr black hole: an exact modelWe present an exact analytical model of axisymmetric gravitational collapse leading to the formation of the Kerr black hole. The model depends only on the total mass M and a time dependent…J Ovalle·Aug 6, 2026SaveLearn
Gravitational waves from a binary source in higher dimensional spacetime with compactified extra dimensionsWe consider the emission of gravitational waves (GW) from a compact binary in a spacetime with compactified extra dimensions. We solve the homogeneous and non-homogeneous wave equation, proving that…Mattia Villani·Aug 6, 2026SaveLearn
A Neutron Star Hidden Inside a Black HoleWe investigate dark matter admixed neutron stars in which the neutron star coexists with an anisotropic dark matter halo described by the Einasto density profile, a model recently shown to produce…Chen Tan, Yong-Qiang Wang·Aug 6, 2026SaveLearn
Spinning Particle Dynamics and Observational Redshift around an Asymptotically Flat Symmergent Black HoleWe investigate timelike particle dynamics, collision energetics, and photon frequency shifts in the perturbative variable-scalar curvature branch of asymptotically flat symmergent gravity. The…Beyhan Puliçe, Ali Övgün·Aug 6, 2026SaveLearn
Quasinormal Modes of Gauss--Bonnet Black Holes via the Spectral Method: Scalar, Vector, and Tensor PerturbationsWe present a unified study of scalar, vector, and tensor quasinormal modes (QNMs) of Schwarzschild black holes corrected by a Gauss--Bonnet (GB) term in higher dimensions. Using a high-precision…Davide Batic, Denys Dutykh·Aug 6, 2026SaveLearn
Radial spectra and dynamical signatures of excited boson starsWe compute the lowest radial mode of spherically symmetric boson stars along equilibrium branches with a fixed number of radial nodes, considering both mini boson stars and quartically…Chen-Hao Hao, Wen-Di Guo, Qin Tan et al.·Aug 6, 2026SaveLearn
Coherent End-to-End Search for Generic Extreme-Mass-Ratio InspiralsExtreme-mass-ratio inspirals (EMRIs) encode more than 105 strong-field orbital cycles and are key targets for space-borne gravitational-wave interferometers, yet coherent recovery of generic…Xiaobo Zou, Xingyu Zhong, Wen-Biao Han et al.·Aug 6, 2026SaveLearn
A Scale-Invariant Theory of the UniverseModern physics has achieved extraordinary empirical success while retaining much of the absolute, unobservable structure introduced by Newton, largely without questioning its necessity. We…Julian Barbour, Maria I. R. Lourenço·Aug 6, 2026SaveLearn
A Novel Kerr-like Black Hole in a General Double Power Law Dark Matter Environment: Geometry, Spectroscopy, and Energy ExtractionWe construct a novel Kerr-like black hole solution embedded in a general double power law dark matter environment by applying the Newman--Janis algorithm to a Schwarzschild-like seed geometry. This…Supakchai Ponglertsakul, David Senjaya·Aug 6, 2026SaveLearn
Asymmetric Quantum Oppenheimer-Snyder CollapseWe study black hole formation resulting from the collapse of a homogeneous and isotropic dust ball within a framework built upon loop quantum cosmology. Using loop dynamics formulated for…Michał Bobula, Tomasz Pawłowski·Aug 6, 2026SaveLearn
How Loud Must a Neutron-Star Merger Be to Reveal Its Equation of State?The tidal response of neutron stars during binary inspiral encodes the equation of state (EOS) of dense matter in the gravitational-wave signal. Quantifying the signal-to-noise ratio (SNR) required…Sk Md Adil Imam·Aug 6, 2026SaveLearn
Constructing the canonical harmonic coordinates of Kerr metric to the fourth post-Minkowskian orderIn this paper we construct the canonical harmonic coordinates of the Kerr metric within the multipolar post-Minkowskian (MPM) formalism to the fourth post-Minkowskian (4PM) order. Based on the well…Zizheng Xing, Xiaokai He, Zhoujian Cao·Aug 6, 2026SaveLearn
Kinematic Bounds on Charged Energy Extraction in the Purely Electric Branch of Euler--Heisenberg Type f(R,T) Black HolesWe derive and test kinematic upper bounds on charged energy extraction in the purely electric branch of a static f(R,T) black hole family sourced by an Euler--Heisenberg type nonlinear…Anirudh Pradhan, K. Ghaderi, M. Zeyauddin·Aug 6, 2026SaveLearn
Charged Penrose Extraction in RN--AdS Black Holes with Dark Energy: Ergosphere Geometry and Rigorous Efficiency BoundsWe develop a quantitative framework for charge assisted Penrose extraction in Reissner--Nordström Anti-de Sitter black holes surrounded by a Kiselev type anisotropic dark energy sector. The…Anirudh Pradhan, K. Ghaderi, M. Zeyauddin·Aug 6, 2026SaveLearn
A First-Order Gauge Approach to de Sitter General RelativityWe propose a first-order gauge formulation of de Sitter relativity in which the pseudo-radius l(x) is promoted to a spacetime field, locally breaking SO(4,1) to SO(3,1). Here, l(x) is a geometric…P. Salgado·Aug 6, 2026SaveLearn
Energy Flux as an Entanglement Current in Moving-Mirror RadiationIn this work, we investigate the quantum entanglement properties of analog Hawking radiation produced by a moving mirror. Using two detector modes defined through window functions on a quantum field,…Yasusada Nambu, Riku Yoshimoto·Aug 6, 2026SaveLearn
Unified dark sector and Hubble-tension alleviation in scalar-vector-tensor gravityWe investigate a scalar-vector-tensor theory in which matter is minimally coupled to a Jordan-frame metric gμν=(1+Ξ)gμν, while a massive vector sector interacts with the baryonic…Kimet Jusufi, Amir A. Khodahami, Ahmad Sheykhi et al.·Aug 6, 2026SaveLearn
Classical General Relativity as a Non-Conservative Action-Dependent Field TheoryPrevious work has provided the mathematical framework within which to analyse dynamical similarities for classical theories of fields. This formalism has been extended to those theories which, in…Callum Bell, David Sloan·Aug 6, 2026SaveLearn