Conservative and dissipative sectors in a nonlinear scalar model for the gravitational self-force problemWhen considering how self-interaction affects an object's motion, it can be convenient to decompose the self-force into conservative and dissipative pieces. As a toy model for understanding such…Francisco M. Blanco, Eanna E. Flanagan, Abraham I. Harte·May 14, 2026SaveLearn
Gravitational Wave Propagation through Viscous MatterIt has been known that gravitational waves (GWs) transfer energy to viscous matter through which they propagate, but the effect is too weak to be astrophysically significant. Using linearized…Vishnu Kakkat, Ulrich K. Beckering Vinckers, Nigel T. Bishop et al.·May 14, 2026SaveLearn
On the catastrophe time of fluids under the action of a gravitational fieldMotivated by the central role of the Zel'dovich approximation in the description of cosmic structure formation through gravitational collapse, we investigate Burgers-type dynamics in a…D. Astesiano, G. Ortenzi, M. L. Ruggiero·May 14, 2026SaveLearn
The sufficiently trapped surfaceRoger Penrose introduced the concept of the trapped surface: a spacelike hypersurface where the two null normals have negative expansion. The trapped surface along with the null convergence condition…Eleni-Alexandra Kontou·May 14, 2026SaveLearn
How Much Can Gravitons Be Squeezed?Quantum Gravity remains elusive, largely because its observable effects are suppressed by powers of the Planck scale. Direct detection of single gravitons is widely believed to be impossible. Here we…Panagiotis Dorlis, Nick E. Mavromatos, Sarben Sarkar et al.·May 14, 2026SaveLearn
Regularized vacuum stress tensor of a scalar field as the inflaton or dark energyWe study the regularized vacuum stress tensor of scalar fields in maximally symmetric spacetime and assess the feasibility of driving primordial inflation or current cosmic acceleration by analyzing…Xuan Ye·May 14, 2026SaveLearn
Wide parameter-space O3 search for continuous gravitational waves from unknown neutron stars in binary systemsContinuous gravitational waves, i.e., persistent and nearly-monochromatic signals emitted by asymmetric spinning neutron stars, remain elusive. Searches for these signals from unknown binary systems…P. B. Covas, M. A. Papa, R. Prix·May 14, 2026SaveLearn
Static spherically symmetric Kundt vacuum solutions of higher-derivative gravitiesWe study static spherically symmetric Kundt solutions to the vacuum field equations of quadratic gravity with a cosmological constant, as well as specific models of six-derivative gravity. In…Breno L. Giacchini, Ivan Kolář, Vojtěch Pravda et al.·May 14, 2026SaveLearn
Parametrization of the primordial power spectrum in loop quantum cosmologyWe investigate the imprints on the angular power spectra of cosmological perturbations of a pre-inflationary bounce phase, as described by the hybrid and dressed metric approaches to loop quantum…Almudena Guillén, Kai Langer, Guillermo A. Mena Marugán et al.·May 14, 2026SaveLearn
Particle Creation and Variable Generalized Chaplygin Gas in F(R,Σ,T) GravityIn this work, we investigate the cosmological dynamics of a spatially flat Friedmann--Lemaître--Robertson--Walker Universe in the framework of generalized \( F(R,Σ,T) \)…N. Myrzakulov, S. H. Shekh, Anirudh Pradhan et al.·May 14, 2026SaveLearn
Consistency in the Quantum-Improved Charged Black HolesWe investigate the consistency in the thermodynamics and the approaches at the equation and action levels for the quantum-improved charged black holes with scale-dependent couplings. For the…Chiang-Mei Chen, Akihiro Ishibashi, Nobuyoshi Ohta·May 14, 2026SaveLearn
Energy conditions in consistent perfect fluid cosmologyMotivated by recent work on consistent fluid couplings in f(R, T) gravity, we study cosmology in the nontrivial model f(R, T) = R + σR T using the Brown variational principle for a barotropic…Davide Batic, Christian G. Boehmer, Denys Dutykh·May 14, 2026SaveLearn
Dyonic black holes supporting nearly-black self-gravitating thin shellsIt has recently been revealed that dyonic black-hole spacetimes of a quasitopological non-linear electrodynamic field theory may be characterized by discrete radial regions with the property…Shahar Hod·May 14, 2026SaveLearn
Cosmological Realization of Baryon Asymmetry in f(R, GμνTμν) GravityThis work investigates the mechanism of gravitational baryogenesis (GB) under the formalism of f(R, GμνTμν) gravity, where R denotes the Ricci scalar, Gμν is the Einstein tensor and Tμν…Kalyan Malakar, Rajdeep Mazumdar, Kalyan Bhuyan·May 14, 2026SaveLearn
Bound-State Resonances of Schwarzschild-de Sitter Black Holes: Analytic TreatmentInspired by Mashhoon's framework connecting black hole quasi-normal modes (QNMs) to bound-state resonances in inverted potentials, Volkel's recent numerical analysis of…Qi-Dong Chen, Chong-Bin Chen, Guo-Qing Huang et al.·May 14, 2026SaveLearn
Hawking radiation from black holes in 2+1 dimensionsThe paper develops a model to understand the effective quantum geometry of a black hole horizon and the emission of Hawking spectrum in 2+1 dimensions. Using the algebra of Hamiltonian charges on…Akriti Garg, Ayan Chatterjee·May 14, 2026SaveLearn
Gravitational edge mode powers galaxy flat rotation curvesThe point-particle approximation is foundational to modelling clustering of matter in the universe, but is fundamentally inconsistent within General Relativity due to associated spacetime…Obinna Umeh·May 14, 2026SaveLearn
General orbital perturbation theory in Schwarzschild space-timeWe derive general relativistic Gaussian equations for osculating elements for orbits under the influence of a perturbing force without any restrictions in an underlying Schwarzschild space-time. Such…Oleksii Yanchyshen, Eva Hackmann, Claus Lämmerzahl·May 14, 2026SaveLearn
Probing higher curvature gravity via ringdown with overtonesWe investigate metric perturbations of a spherically symmetric black hole in higher curvature gravity. We show that higher curvature corrections deform the near-horizon region of the effective…Keisuke Nakashi, Masashi Kimura, Hayato Motohashi et al.·May 14, 2026SaveLearn
Spinning extremal dyonic black holes in γ=1 Einstein-Maxwell-dilaton theoryWe propose a general framework for the study of asymptotically flat spinning dyonic extremal black holes (eBHs) in D=4 Einstein-Maxwell-dilaton theory. Restricting to the stringy value γ=1…Jose Luis Blázquez-Salcedo, Carlos Herdeiro, Eugen Radu et al.·May 14, 2026SaveLearn
Cosmological implications of Bumblebee theory on an FLRW backgroundWe investigate some cosmological implications at background level of the Bumblebee model. The phase-space, the critical points and their stability are analyzed in detail applying well-established…Manuel Gonzalez-Espinoza, Grigorios Panotopoulos, Francisco Tello-Ortiz·May 14, 2026SaveLearn
Asymptotic charges of a quadrupolar naked singularityThe purpose of this article is to compute the asymptotic charges of a vacuum solution to the Einstein field equations describing a naked singularity with a non-vanishing quadrupole moment, known in…Edgar Gasperin, Mariem Magdy·May 14, 2026SaveLearn
On Modelling the Surfaces of Celestial Bodies in Quantum GravityWe discuss how to model the surface of celestial bodies (such as stars) in quantum gravity to ensure the regularity of quantum corrections to classical solutions of general relativity at the surface…Xavier Calmet, Marco Sebastianutti·May 14, 2026SaveLearn
Fermionic Love number of Reissner-Nordström black holesThe tidal deformation of compact objects, characterised by their Love numbers, provides insights into the internal structure of neutron stars and black holes. While static bosonic tidal Love numbers…Xiankai Pang, Yu Tian, Hongbao Zhang et al.·May 14, 2026SaveLearn
A Robust and Efficient F-statistic-based Framework for Consistent Bayesian Inference of Compact Binary CoalescencesWe present a comprehensive investigation of the F-statistic method for parameter estimation of gravitational wave (GW) signals from compact binary coalescences. By analytically maximizing the…Hai-Tian Wang·May 14, 2026SaveLearn