Imprints of core/cusp dark matter distributions on black hole signatures in galaxiesIn galactic environments, a host dark matter (DM) halo can imprint weak but coherent corrections on black hole (BH) strong-field observables. We construct an exact family of static and spherically…Hassan Hassanabadi, Che-Yu Chen, Soroush Zare et al.·Aug 11, 2026SaveLearn
Analysis of the equations of motion of fictitious matter in embedding theoryEmbedding theory is a possible modification of general relativity that provides a framework for explaining the observed effects typically attributed to dark matter. The idea of this modification is…A. J. Ziyatdinov, S. A. Paston·Aug 11, 2026SaveLearn
All You Need is not Ωgw: Beyond the Mean of the Cross-Correlation Estimator when Searching for an Astrophysical Gravitational-Wave BackgroundSearches for the stochastic gravitational-wave background (SGWB) using ground-based detectors rely heavily on the cross-correlation estimator Cf, whose statistical properties determine the…Haowen Zhong, Francesco Iacovelli, Vuk Mandic et al.·Aug 11, 2026SaveLearn
Quasinormal modes in effective loop quantum gravity and consequences for isospectralityWe investigate the quasinormal mode spectra of axial and polar perturbations about the effective Ashtekar, Olmedo, and Singh black hole geometry within the hybrid approach to loop quantum gravity. We…Alejandro García-Quismondo, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros·Aug 11, 2026SaveLearn
Periodic orbits and gravitational wave signatures from magnetic dipoles around magnetized Kerr black holesWe study periodic orbits and the associated gravitational radiation of a magnetized (uncharged) test particle carrying a magnetic dipole moment with coupling constant beta, moving in the equatorial…Shokhzod Jumaniyozov, Javlon Rayimbaev, Chengxun Yuan et al.·Aug 11, 2026SaveLearn
Ultracompact Anisotropic Stars and Gravastars in General RelativityWe study static, spherically symmetric ultracompact objects in General Relativity with anisotropic stress. Using the covariant anisotropic equation of state and assuming homogeneous density, we…Prajwal Hassan Puttasiddappa, Nora Bretón, Santiago Esteban Perez Bergliaffa·Aug 11, 2026SaveLearn
Radiation-reaction driven dynamics at the third-and-a-half post-Newtonian order in different gaugesWe consider the coordinate-dependent definition of the radiation-reaction force at the third-and-a-half post-Newtonian order for general orbits. In order to (partially) determine its expression we…Donato Bini, Andrea Geralico, Sara Rufrano Aliberti·Aug 11, 2026SaveLearn
Constraining ModMax Black Holes with EHT and GRAVITY Observations: Optical Signatures and Accretion Disk PropertiesIn this work, we study photon propagation and the radiative properties of a thin accretion disk around a ModMax black hole and examine the effects of the charge Q (i.e. Q2 = Q2e +Q2m is the…Tursunali Xamidov, Mirjavoxir Mirkhaydarov, Sanjar Shaymatov et al.·Aug 11, 2026SaveLearn
Conductors and superconductors in stationary spacetimes: generalized Schiff-Barnhill and Meissner effectsPrevious studies on conductors and superconductors in curved spacetimes, and the gravitationally-induced electric and magnetic fields in them, are mostly restricted to the limit of weak fields and…F. Masghatian, M. Nouri-Zonoz, H. Sadegh·Aug 11, 2026SaveLearn
Radiative Signatures from Warp Drives Traveling Through the Earth's AtmosphereWe investigate the observable signatures of zero ADM mass warp drive spacetimes traversing Earth's atmosphere. Numerical simulations indicate that an aircraft-scale spacetime bubble moving at…Shaun David Brocus Fell, Abraham Loeb·Aug 11, 2026SaveLearn
Octupolar Gravitational Radiation in de Sitter SpacetimeWe derive the gravitational radiation generated by a localised matter source in de Sitter spacetime at octupolar order in the multipolar expansion, working in generalised harmonic gauge in the future…Harsh, Omkar Shetye, Amitabh Virmani·Aug 11, 2026SaveLearn
Two-Fluid Schwarzschild SolutionWe consider the interior two-fluid Schwarzschild solution. That is a model of compact (neutron) stars with admixed dark matter. The two constant energy densities generalize the interior Schwarschild…Rico Zöllner, Burkhard Kämpfer·Aug 11, 2026SaveLearn
The generalized second law as a thermodynamic selection criterion for dynamical dark energyThe growing number of generalized horizon entropy proposals has led to a wide variety of modified cosmological models, yet there is currently no general physical principle capable of discriminating…Marcos H. Cruz, Miguel Cruz, Joel Saavedra et al.·Aug 11, 2026SaveLearn
Quantum-Corrected Entropy Bounds on Black Hole Merger EfficiencyWe examine the entropy balance of black hole mergers in the presence of quantum gravity corrections described by the Generalized Uncertainty Principle (GUP). Focusing on the coalescence of two…Jiswin Varghese·Aug 11, 2026SaveLearn
Probing scalarized wormholes through quasi-periodic oscillations and spinning particle dynamicsWe investigate the dynamics of test particles in a three-parameter scalarized wormhole spacetime within Einstein-scalar field theory. For spinless particles, we derive the orbital and epicyclic…Asalkhon Alimova, Akbar Davlataliev, Farruh Atamurotov et al.·Aug 11, 2026SaveLearn
A Dynamical-Photometric Phase Space for Spiral Galaxies: Probing the Local Coupling Between Light and GravityThe interplay between luminous matter distribution and the local gravitational field within disc galaxies encodes physical information beyond that captured by global scaling relations. We introduce a…Aritra Sanyal, Farook Rahaman·Aug 10, 2026SaveLearn
On the nature of oscillating modes of proto-neutron starsNewborn proto-neutron stars (PNS) are potential targets of gravitational wave asteroseismology, the study of the (inner) structure of stars via their oscillation modes. To prepare for the eventual…Dimitra Tseneklidou, Alejandro Torres-Forne, Pablo Cerda-Duran et al.·Aug 10, 2026SaveLearn
Late-Time Cosmic Acceleration in Hořava-Lifshitz Gravity: Observational Evidence from Cosmic Chronometers and Pantheon+SHOES DatasetsWe investigate the cosmological implications of Horava-Lifshitz (HL) gravity using a redshift-dependent deceleration parameter of the form q(z) = q0 + q1 (1+z)1 + n(1+z), from…Shivani Sharma, R. Chaubey·Aug 10, 2026SaveLearn
A parametrized test of general relativity for inspiralling eccentric binaries in LISAThe space-based detector Laser Interferometer Space Antenna (LISA) will observe inspiralling black hole binaries in the mHz band, many of which may retain orbital eccentricity. In contrast to…Pankaj Saini, Sylvain Marsat, Lorenz Zwick et al.·Aug 10, 2026SaveLearn
Static anisotropic stars in Lovelock gravity: Universal closed-form equationsA characteristic-polynomial formulation is already known for static perfect fluids in Lovelock gravity [Phys. Rev. D 113, 084008 (2026)]. We extend it to the complete anisotropic matter sector. For…Sudan Hansraj·Aug 10, 2026SaveLearn
Horizon flux-balance laws in the multiscale perturbationBlack-hole event horizons obey a set of evolution equations governing their intrinsic and extrinsic geometry. We study these equations in a two-timescale perturbative expansion about a Kerr…Ali Seraj·Aug 10, 2026SaveLearn
Probing nonlinear electrodynamics-sourced black holes via light and orbital mechanicsWell-founded models of nonlinear electrodynamics (NED) are typically characterized by an additional parameter associated with their deviation from linear electrodynamics. In addition to that, from a…Marco A. A. de Paula, Ednaldo L. B. Junior·Aug 10, 2026SaveLearn
Rotating near-horizon extreme geometries in quadratic gravityRotating near-horizon extreme solutions of quadratic gravity are analyzed combining power series expansions and numerical calculations. Restricting to geometries with symmetries of the near-horizon…Breno L. Giacchini, Ivan Kolář·Aug 10, 2026SaveLearn
Probing ultralight bosons with LISA observations of spinning black hole mergers and follow-up searches of merger remnantsUltralight bosons can trigger superradiant instabilities around rotating black holes, extracting angular momentum and leading in some cases to observable gravitational signatures. When the associated…Ifigeneia Giannakoudi, Maxence Corman, William E. East·Aug 10, 2026SaveLearn
Adiabatic Perturbations in GW170817-Compatible Einstein-Gauss-Bonnet InflationWe study the adiabaticity of the cosmological perturbations in the context of inflationary Einstein-Gauss-Bonnet theories. We focus on viable inflationary Einstein-Gauss-Bonnet theories which are…S. D. Odintsov, V. K. Oikonomou·Aug 10, 2026SaveLearn