How much of the black hole ringdown is sourced within the light ring?Not much. It has been proposed that applying a rational filter to a black hole ringdown gravitational waveform reveals a direct wave component sourced near the event horizon. By solving the Teukolsky…Mark Ho-Yeuk Cheung·Aug 29, 2026SaveLearn
Automated identification and subtraction of gravitational-wave glitches using boundary refinementTransient noise artifacts, or glitches, in gravitational wave strain data elevate the false alarm rate of astrophysical searches and degrade parameter estimation when overlapping a signal. No method…Mohammad Abu Thaher Chowdhury, Soumya D Mohanty·Aug 29, 2026SaveLearn
Optimizing Superconducting Microwave Cavities for Gravitational Wave SensingSuperconducting microwave cavities loaded with radio frequency fields are a powerful tool to search for weak forces or electromagnetic perturbations due to new physics. One source of such signals can…Lars Fischer, Wolfgang Hillert, Tom Krokotsch et al.·Aug 29, 2026SaveLearn
Energy extraction processes and thermodynamics in rotating Weyl conformal black holesThis work investigates the original Penrose process (PP), as well as black hole (BH) thermodynamics, within the framework of conformal Weyl gravity. The theory is characterized by the dimensionful…Dilmurod Ortiqboev, Farruh Atamurotov, Ahmadjon Abdujabbarov et al.·Aug 29, 2026SaveLearn
Resonant bound orbits and kludge waveforms in rotating Konoplya-Zhidenko black hole spacetimeWe investigate timelike bound motion, resonant periodic orbits, and their gravitational-wave signatures in the rotating Konoplya-Zhidenko (KZ) black hole spacetime. Using the separability of the…Qiyu Dai, Xiongjun Fang, Xiao-Mei Kuang et al.·Aug 29, 2026SaveLearn
Yukawa modification of Traversable Wormholes supported by Holographic Dark EnergyInspired by holographic dark energy models, we extend the analysis performed in Ref.RGPC taking into account Yukawa deformations on the different energy density (HDE) profiles. The profiles we…Remo Garattini, Phongpichit Channuie, Kirill Zatrimaylov·Aug 29, 2026SaveLearn
Exact dynamics and the spin wall for large-spin particles in Schwarzschild spacetimeThe motion of a spinning test particle in a curved spacetime is governed by the Mathisson--Papapetrou--Dixon (MPD) equations and deviates from geodesic motion already at first order in the spin.…Chao-Jun Feng, Rui-Hui Lin·Aug 29, 2026SaveLearn
Schwarzschild spectral ladders on the negative imaginary axis: Endpoint nonselection, branch-cut phase, and Jost classificationCompactified spectral discretisations may yield stable negative-imaginary-axis (NIA) eigenvalue ladders, but finite-matrix convergence does not establish quasinormal poles. For axial Schwarzschild…Davide Batic, Denys Dutykh, Mark Essa Sukaiti·Aug 29, 2026SaveLearn
Parameter Space, Realistic Matter, and Universal Relations in Bose--Einstein Condensate Dark StarsWe study slowly rotating Bose--Einstein condensate (BEC) dark stars by solving the Tolman--Oppenheimer--Volkoff, Hartle dipole, and Postnikov--Hinderer equations together for a polytropic equation of…M. Ilyas·Aug 28, 2026SaveLearn
A Unified Treatment of the Self-Force ProblemThis paper introduces formalism, based on worldline effective field theory, which allows one to systematically calculate the gravitational self-force on a compact object immersed in an environment…Beka Modrekiladze, Ira Z. Rothstein, Jordan Wilson-Gerow·Aug 28, 2026SaveLearn
Spin-Graviton-Spin: a unique probe of quantum gravityThe existence of quantum gravity is the most important question in theoretical physics. Besides the theoretical development in this direction, looking for its low-energy consequences can provide…Radmehr Fathi, Nima Khosravi·Aug 28, 2026SaveLearn
Stationary Rotating Geometries Associated with Nonsingular Pulsating CollapseSince the first exact solutions of General Relativity (GR) were obtained, it became clear that the theory predicts a new class of compact objects: black holes. The Hawking--Penrose singularity…A. D. Souza, F. A. Brito, J. Spinelly·Aug 28, 2026SaveLearn
Torsion and Nonmetricity Constraints From Neutron Spin Rotation in Polarized MatterMany modified-gravity frameworks employ non-Riemannian connection degrees of freedom, including torsion and nonmetricity. In Einstein-Cartan-type theories, torsion is associated with spin density,…Sepehr Samiei, Ralf Lehnert, W. Michael Snow·Aug 28, 2026SaveLearn
Acceleration and Rotation in Three DimensionsWe present a new family of exact solutions representing accelerating, rotating, point particle and black hole solutions in three-dimensional Einstein gravity. We investigate their geometric…Cameron R D Bunney, Ruth Gregory, Robert B Mann·Aug 28, 2026SaveLearn
A Quasi-local Entropy for Black Hole Space-timesWe show that for static & spherically symmetric black hole geometries, the angular components of the Brown-York tensor on a finite radius boundary can be interpreted as the product of the…Raymond Isichei·Aug 28, 2026SaveLearn
Inspiralling Binary merger parameter reconstruction with lunar and satellite Laser RangingPrecision tracking of Earth--Moon and Earth--satellite ranges offers a novel, low-frequency avenue for detecting gravitational waves from inspiralling massive black hole binaries, complementary to…Miguel Vanvlasselaer·Aug 28, 2026SaveLearn
Global structure of Kerr-Newman-BR spacetimeWe conduct an investigation of the global structure of Kerr-Newman-BR spacetime and its various subcases such as Schwarzschild-BR spacetime. In this work, we extend the result of our previous…Hryhorii Ovcharenko·Aug 28, 2026SaveLearn
Photon Spheres and Shadows of Covariant Loop Quantum Black Holes in the general μ-schemeWe investigate black hole shadows and photon sphere properties for two families of covariant quantum-corrected black-hole metrics (hereafter called BH-I and BH-II) formulated within a general…Yu Han, Meng Liu, Yongzhuang Li·Aug 28, 2026SaveLearn
Devoured by a Hairy Gargantua: Probing Massive Scalar Charges with Non-minimal Curvature Coupling with Extreme-Mass-Ratio InspiralsUltralight scalar fields nonminimally coupled to curvature can endow rotating black holes with stationary hair and alter nearby orbits. Using recently constructed hairy black-hole spacetimes, we…Leif Lui, Adrian Ka-Wai Chung, Alejandro Torres-Orjuela·Aug 28, 2026SaveLearn
Dynamical friction on black holes in scalar field environmentAstrophysical black holes exist within non-vacuum environments, and their motion through these environments generically result in a force on these black holes through processes such as dynamical…Adith Praveen, Dawood Kothawala·Aug 28, 2026SaveLearn
Compact Core--Shell Equilibria in Gravitational Vlasov--Poisson Systems with Positive and Negative MassWe construct regular, spherically symmetric, compact energy-cutoff equilibria for gravitational Vlasov--Poisson systems sourced by positive and negative mass distributions in the context of stellar…Naoki Sato·Aug 28, 2026SaveLearn
Thermodynamic Criticality in FLRW Cosmology with Non-extensive Loop Quantum Gravity EntropyWe investigate thermodynamic criticality in a spatially flat Friedmann-Lema\ıtre-Robertson-Walker universe with a non-extensive Loop Quantum Gravity inspired entropy on its apparent horizon. Using…Miguel Cruz, Joel Saavedra, Juan Rodriguez·Aug 27, 2026SaveLearn
Creation of an inflationary epoch from an Emergent Universe through quantum tunnelingWe consider that the very early Universe was well described by an Emergent Universe, whose geometry was that of a static and classically stable Einstein Universe, which is possible in certain Two…Eduardo I. Guendelman, Ramon Herrera, Pedro Labraña·Aug 27, 2026SaveLearn
Emergent vacua and stability constraints on black hole solutions in higher-dimensional f(R) gravityWe investigate static spherically symmetric vacuum solutions in higher-dimensional f(R) gravity, beginning with the five-dimensional Starobinsky model governed by the action f(R) = R + αR2 - 2Λ.…Nicolás Trullols Sandino, Andrei Galiautdinov·Aug 27, 2026SaveLearn
Electric and magnetic Penrose processes, charged-particle collisions and superradiance around a Lorentz-violating dyonic black holeThis paper is aimed at investigating electromagnetic energy extraction, charged-particle collisions, charged-field superradiance, and horizon stability in a Lorentz-violating dyonic Kalb-Ramond black…Fernando M. Belchior, Edilberto O. Silva·Aug 27, 2026SaveLearn