Gravitational Waves and Matter Constraints in Gravity from EntropyWe show that Gravity from Entropy (GfE) exhibits a tensor-propagation pathology on generic FLRW backgrounds. In vacuum, in the symmetry-inheriting single-multiplet sector, and for the algebraic…David S. Pereira·Sep 2, 2026SaveLearn
Scalar quasinormal modes of Kerr--AdS 7 via accessory parameter expansionsWe study scalar perturbations of a seven-dimensional Kerr--AdS black hole with three independent rotation parameters. In this geometry, the Klein--Gordon equation separates into one radial and two…Julián Barragán Amado·Sep 2, 2026SaveLearn
DANSurHM: Modularly incorporating higher modes in a deep learning based gravitational-wave surrogateNumerical relativity (NR) simulations provide the most faithful representation of the gravitational waves (GWs) emitted by binary black hole (BBH) systems during merger. In the context of GW…Osvaldo Gramaxo Freitas, Anastasios Theodoropoulos, Nino Villanueva et al.·Sep 2, 2026SaveLearn
Excitation factors and exceptional points of Kerr-de Sitter quasinormal modesWe compute the excitation factors of Kerr-de Sitter black hole quasinormal modes using two different techniques: a Heun function representation and an expansion of the solution in terms of…Dario Rossi, Naritaka Oshita, Leonardo Gualtieri et al.·Sep 2, 2026SaveLearn
Tidally-enhanced resonances in extreme-mass-ratio inspirals: A tertiary path to chaosExtreme-mass-ratio inspirals (EMRIs) provide a unique laboratory for probing strong-field gravity and complex relativistic dynamics. We study a tidally deformed EMRI composed of a stellar-mass…Kyriakos Destounis, Takuya Katagiri, Sajal Mukherjee et al.·Sep 2, 2026SaveLearn
Charged black-hole binary radiation at second post-Newtonian orderIn this work, we build on Ref.~[Phys.~Rev.~D 112, 124060 (2025)], where we derived the dynamics of an electrically charged binary system at second post-Newtonian (2PN) order, by extending the…Andrea Placidi, Elisa Grilli, Matteo Pegorin et al.·Sep 2, 2026SaveLearn
Ultralight Bosons Explain the Mass-Spin Correlations in the Merging Binary Black Hole PopulationUltralight bosons could trigger superradiant instabilities in rapidly spinning black holes, forming oscillating clouds while extracting rotational energy. We consider an extended,…Xiao-Xiao Kou, Vuk Mandic, Ran Ding et al.·Sep 2, 2026SaveLearn
Thermal Quantum Fluctuations in Einstein-Nonlinear Maxwell-Yukawa Black HoleThis study investigates an Einstein-nonlinear electrodynamic black hole generated by a Yukawa-screened electromagnetic potential and examines its thermal properties through the calculation of the…M. Mangut·Sep 2, 2026SaveLearn
Relativistic stellar collapse of initially static configurationsWe study the dynamics of a radiating relativistic star in the presence of the electromagnetic field and the cosmological constant. The evolution of the model originates from an initially static…Keshlan S. Govinder, Megandhren Govender, Sunil Maharaj·Sep 2, 2026SaveLearn
Frequency-domain extended-effective-source gravitational self-force for eccentric Schwarzschild orbitsEffective-source formulations provide a practical route to gravitational self-force (GSF) calculations when singular retarded fields cannot be handled directly mode by mode. Up to now, only…Xuchen Lu, Yungui Gong, Bokai Zhang et al.·Sep 2, 2026SaveLearn
Covariant linear response theory for a photon gas in curved spacetimeTo overcome the failure of the conventional non-relativistic description of statistics in strong gravitational fields, we develop a covariant theory for a photon gas in curved spacetime, starting…Jianan Wang, Long Cui, Bin Wu·Sep 2, 2026SaveLearn
Horizon energy fluctuations beyond Einstein's gravity: Gauss-Bonnet, Lovelock and Quantum deformed frameworksWe study thermal energy fluctuations of cosmological horizons within the canonical ensemble framework, treating the horizon as a thermodynamic system characterized by temperature and entropy. The…P. B. Krishna, Lini Devassy, Titus K. Mathew·Sep 2, 2026SaveLearn
The Analytical Solutions of Dyonic Black Holes in Einstein-Euler-Heisenberg TheoryRecently, we constructed analytical purely electric and purely magnetic black-hole solutions in Einstein--Euler--Heisenberg theory, while the corresponding dyonic solutions were obtained numerically…Haoyuan Luo, Nan Cao, Xiao Yan Chew et al.·Sep 2, 2026SaveLearn
Redshift Spectroscopy as a Probe of Regular Black Holes, Black Bounces, and Scalar-Hair Compact ObjectsMotivated by [Phys. Rev. D. 107, 064019 (2023)], we develop a unified and model-independent framework for the spectroscopy of photon frequency shifts in generic static, spherically symmetric…Ali Övgün, Reggie C. Pantig, Joel Saavedra·Sep 2, 2026SaveLearn
Boundary-Geometry-Driven Black Hole Formation in VacuumWe identify a boundary-geometry-driven mechanism for the dynamical formation of marginally outer trapped surfaces (MOTSs) in vacuum general relativity. Mild three-dimensional anisotropies evolve…Dipanjan Dey, Puskar Mondal, Shing-Tung Yau·Sep 2, 2026SaveLearn
Accretion dynamics of thin and thick disks in charged Kalb-Ramond black holesIn this work, we investigate the accretion properties of an electrically charged, static, spherically symmetric black hole in Kalb-Ramond (KR) gravity, where a dimensionless parameter l…Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo et al.·Sep 2, 2026SaveLearn
Cosmological implications for hairy black holes via spontaneous symmetry breaking: Are Hairy Black Holes Primordial?We investigate whether hairy black holes generated through spontaneous symmetry breaking in Einstein-Scalar-Gauss-Bonnet (ESGB) theory, involving a complex scalar field with a global U(1) symmetry,…Suruj Jyoti Das, Miok Park·Sep 2, 2026SaveLearn
Collective Onset of Matter-Induced Scalarization around a Black Hole with Two Thin ShellsWe study the linear onset of matter-induced scalarization for a static black hole surrounded by two spatially separated thin matter shells. We assume that the conformal matter coupling is unity on…Masahiro Kaminaga·Sep 2, 2026SaveLearn
Quark stars in regularized 4D Einstein-Gauss-Bonnet gravity: A perturbative QCD equation of stateWe investigate the equilibrium structure and stability of selfbound quark stars in the framework of regularized four-dimensional Einstein--Gauss--Bonnet (4DEGB) gravity, employing the perturbative…Anirudh Pradhan, Safiqul Islam, Safyan Mukhtar et al.·Sep 1, 2026SaveLearn
One Gravity, Many G's: Generalized Horizon Entropy and Gravitational SusceptibilityEffective and thermodynamic derivations of gravity theory in the context of generalized entropy can give rise to multiple, and potentially varying, gravitational couplings, raising the question of…Yen Chin Ong·Sep 1, 2026SaveLearn
On scalar and electromagnetic perturbations of the root--Kerr objectWe study scalar and electromagnetic perturbations of the root--Kerr object. Its source-free exterior carries the electromagnetic field obtained in the vanishing-mass limit of the Kerr--Newman black…Samim Akhtar·Sep 1, 2026SaveLearn
Fixed ADM reconstruction of extended uncertainty principle black holesWe study a phenomenological fixed-ADM prescription for an extended-uncertainty-principle (EUP) correction to the Schwarzschild exterior. Rather than treat mass constancy as a consequence of the EUP,…Nikko John Leo S. Lobos, Ali Övgün, Reggie C. Pantig·Sep 1, 2026SaveLearn
A Tale of Two Calibrators: Comparing Newtonian and Photon Calibration in Advanced LIGO after the Third Observing RunPrecise calibration of LIGO's strain readout plays a vital role in our ability to extract information from gravitational-wave detections. We present a comparative analysis of two independent…Dana Jones, Michael P. Ross, Ling Sun et al.·Sep 1, 2026SaveLearn
Scalar Field Model for Dark Matter Spikes Surrounding Sgr A* and M87*Theoretical models suggest that the adiabatic growth of a black hole immersed in dark matter can lead to the formation of high density regions of dark matter, known as ``spikes'', near the…Ramin G. Daghigh, Michael D. Green, Gabor Kunstatter·Sep 1, 2026SaveLearn
Exploration of Zero-Complexity Compact Stars in Higher Dimensions under the Finch-Skea BackgroundMotivated by the recent extension of Herrera's gravitational complexity to arbitrary higher-dimensional spacetimes, we investigate exact compact-star models that satisfy the vanishing-complexity…Shyam Das, Megandhren Govender, Kevin Reddy et al.·Sep 1, 2026SaveLearn