Probing Effective Field Theory Corrections with Quasinormal Modes and Gravitational Lensing in Reissner-Nordström Black HolesEffective field theory (EFT) provides a systematic framework for parametrizing possible higher-energy corrections to general relativity through higher-curvature interactions. In this work, we…Takamasa Kanai·Jun 18, 2026SaveLearn
Stationary generalizations for the vacuum ring wormholeThe ring wormhole is the zero-mass limit of the Kerr metric. Its geometry is locally flat, but the topology is nontrivial, with a throat connecting two asymptotic regions and a distributional…Mikhail S. Volkov·Jun 18, 2026SaveLearn
Robinson-Trautman spacetimes in (2+1) dimensionsWe propose a Robinson-Trautman evolution in (2+1)-dimensional spacetime that retains key structural features of the four-dimensional case. We consider a recently studied exact family of metrics to…Alberto Saa·Jun 18, 2026SaveLearn
Emergent ΛCDM cosmology from a measure-induced deformation of the Newtonian actionWe propose a minimal extension of the Newtonian action by introducing a time-dependent fractional kernel characterized by a single deformation parameter α. This kernel admits a natural…S. M. M. Rasouli·Jun 18, 2026SaveLearn
Static Dark Fluid Thin Shells in Schwarzschild-de Sitter Spacetimes: Stability and Black Hole ShadowsWe study the existence and radial stability of static, spherically symmetric thin shells joining two Schwarzschild--de~Sitter (SdS) spacetimes (m,Λ). Using the Israel junction formalism, we…Dimitrios Efstratiou, Evangelos Achilleas Paraskevas, Leandros Perivolaropoulos·Jun 18, 2026SaveLearn
Quantum fields in boson star spacetimeBoson stars have been extensively studied in classical gravity, but their quantum properties remain comparatively unexplored. In this paper, we compute the quantum scalar fields and stress tensor in…Paul M. Saffin, Qi-Xin Xie·Jun 18, 2026SaveLearn
Universality in quasinormal modes of a magnetized black holeIn this work, we investigate the linear stability of a magnetized Einstein-Maxwell solution describing a static, axially symmetric black hole (BH) immersed in a uniform magnetic field B. We probe…Marcos R. Ribeiro, Eveling C. Ribeiro, Kai Lin et al.·Jun 18, 2026SaveLearn
Analysis of late-time tails in spin-aligned eccentric binary black hole mergersWe present a comprehensive analysis of late-time tails in gravitational radiation from merging spin-aligned eccentric binary black holes, using high-accuracy point-particle black hole perturbation…Tousif Islam, Guglielmo Faggioli, Gaurav Khanna·Jun 18, 2026SaveLearn
Gravitational Waves from the Big BangFor millennia, humanity has relied exclusively on lightx2014initially visible light and, later, broader and broader portions of the electromagnetic spectrumx2014to observe the…Lucas Martins Barreto Alves·Jun 18, 2026SaveLearn
Accurate models for recoil velocity distribution in black hole mergers with comparable to extreme mass-ratios and their astrophysical implicationsModeling the remnant recoil velocity (kick) distribution from binary black hole mergers is crucial for understanding hierarchical mergers in active galactic nuclei or globular clusters. Existing…Tousif Islam, Digvijay Wadekar·Jun 18, 2026SaveLearn
Complexity Growth in Black Holes: A Comparison of the Volume and Action ProposalsIn this article, we investigate the late-time growth of holographic complexity, defined via the complexity-volume (CV) and complexity-action (CA) prescriptions, for BTZ, Schwarzschild,…Suraj Maurya, Sashideep Gutti, Rahul Nigam et al.·Jun 18, 2026SaveLearn
Consistency of spin effects between numerical relativity and perturbation theory for inspiraling comparable-mass black hole binariesNumerical relativity (NR) provides the most accurate waveforms for comparable-mass binary black holes but becomes prohibitively expensive for increasingly asymmetric mass ratios. Point-particle black…Tousif Islam, Gaurav Khanna, Scott E. Field·Jun 18, 2026SaveLearn
Data-driven extraction, phenomenology and modeling of eccentric harmonics in binary black hole merger waveformsNewtonian and post-Newtonian (PN) calculations suggest that each spherical harmonic mode of the gravitational waveforms (radiation) emitted by eccentric binaries can be further decomposed into…Tousif Islam, Tejaswi Venumadhav, Ajit Kumar Mehta et al.·Jun 18, 2026SaveLearn
Post-Newtonian theory-inspired framework for characterizing eccentricity in gravitational waveformsCharacterizing eccentricity in gravitational waveforms in a consistent manner is crucial to facilitate parameter estimation, astrophysical population studies, as well as searches for these rare…Tousif Islam, Tejaswi Venumadhav·Jun 18, 2026SaveLearn
Universal phenomenological relations between spherical harmonic modes in non-precessing eccentric binary black hole merger waveformsUsing publicly available numerical relativity (NR) simulations for non-spinning eccentric binary black hole (BBH) mergers, Ref Islam:2024rhm demonstrated that the eccentricity-induced…Tousif Islam, Tejaswi Venumadhav·Jun 18, 2026SaveLearn
Adding higher-order spherical harmonics in non-spinning eccentric binary black hole merger waveform modelsgwNRHME is a recently developed framework that seamlessly converts a multi-modal (i.e with several spherical harmonic modes) quasi-circular waveform into multi-modal eccentric waveform if the…Tousif Islam, Gaurav Khanna, Scott E. Field·Jun 18, 2026SaveLearn
Scalar-scalar-tensor interaction in DHOST theoriesWe derive the general cubic action for perturbations about a cosmological background in the quadratic subclass of degenerate higher-order scalar-tensor (DHOST) theories, focusing on…S. Mironov, V. Volkova·Jun 17, 2026SaveLearn
Exact vacuum FLRW solutions in q-deformed Brans-Dicke cosmologyWe study a q-deformed extension of Brans-Dicke gravity in a spatially flat Friedmann-Lemaître-Robertson-Walker space-time. The deformation enters through a coupling function that modifies the…Salih Kibaroğlu, Mustafa Senay·Jun 17, 2026SaveLearn
Dynamical tidal response of neutron stars: From effective field theory to gravitational waveformsWe investigate the fully relativistic dynamical tidal response of neutron stars up to second order in the frequency. Combining the worldline effective field theory for extended gravitating bodies…Thomas Apostolidis, Valerio De Luca, Leonardo Gualtieri et al.·Jun 17, 2026SaveLearn
Deriving effective descriptions and signal predictions for dynamical gravitational systemsWe investigate top-down derivations of effective descriptions of radiation from gravitational systems such as binaries. With a specified cutoff prescription, one can derive worldline effective field…Steven B. Giddings, Madhur Mehta·Jun 17, 2026SaveLearn
Exact Solution of the Non-minimally Coupled Klein-Gordon Equation in the Schwarzschild StarWe present for the first time the exact solution of the massive Klein-Gordon equation in the Schwarzschild star (perfect-fluid, uniform-density, spherically-symmetric star), including the non-minimal…Reynan A. Dulinayan, Kevin T. Grosvenor·Jun 17, 2026SaveLearn
A Potential Black Hole Mimicker From Non-Minimal CouplingWe present a class of horizonless, regular ultra-compact objects arising in a theory of gravity which allows curvature-fluid coupling. The non-minimal interaction between fluid variables and the…Debanjan Debnath, Rikpratik Sengupta, Kaushik Bhattacharya·Jun 17, 2026SaveLearn
Distinct Near-Horizon Trend of Synchrotron Polarization in Kerr SpacetimeWe show that the near-horizon expansion of the linear polarization vector for synchrotron emission in a Kerr background admits a distinct analytic form. For emission from a stationary, axisymmetric,…Yehui Hou, Jiewei Huang, Bin Chen·Jun 17, 2026SaveLearn
Kiselev black hole and the ultra-slow evaporating behaviorKiselev solution is a metric that describes black holes immersed in a quintessence-like dark energy background. By introducing a dynamic state parameter wq, the Kiselev solution is supposed to…Chen-Hao Wu, Xiao Liang, Ya-Peng Hu·Jun 17, 2026SaveLearn
Non-trivial boundary conditions in general-relativistic modelsWe propose an alternative interpretation of dark matter effects within the framework of General Relativity. In particular, we suggest that, in astrophysical and cosmological contexts, different…Davide Astesiano, Matteo Luca Ruggiero, Federico Re·Jun 17, 2026SaveLearn