Gravitational radiation reaction for compact binary systems at the fourth-and-a-half post-Newtonian order in harmonic coordinatesWe derive the gravitational radiation-reaction (RR) force in the harmonic coordinate system at the fourth-and-a-half post-Newtonian (4.5PN) order in the case of compact binary systems. Dimensional…Luc Blanchet, Guillaume Faye, Emeric Seraille et al.·May 22, 2026SaveLearn
Critical phenomenon inside asymptotically flat black holes with spontaneous scalarizationWe study the interior dynamics of spontaneously scalarized black holes in Einstein-Maxwell-Scalar theory with zero cosmological constant, revealing novel critical phenomena. We demonstrate that, for…Li Li, Ze Sun, Fu-Guo Yang·May 22, 2026SaveLearn
Efficient Search for Detection Candidates Using a Peak Finder Strategy for All-Sky-All-Frequency Gravitational Wave RadiometerThe first all-sky-all-frequency (ASAF) radiometer search was conducted using data from the first three observing runs of the Advanced LIGO and Advanced Virgo detectors. The significance of this…Arindam Sharma, Deepali Agarwal, Sanjit Mitra·May 22, 2026SaveLearn
Inflationary models in a minimally coupled f(R,T) gravity: Constraints from Planck, BICEP/Keck, and ACTThe advent of high-precision cosmological observations has challenged many traditional inflationary models. Data from Planck 2018 along with the BICEP/Keck 2018 result have already ruled out most…Biswajit Deb, Atri Deshamukhya·May 22, 2026SaveLearn
Global time-frequency search for stellar-mass binary black holes in LISAWe present a complete pipeline for detecting and characterizing gravitational waves (GWs) produced by the inspiral of stellar-mass binary black holes in data from the Laser Interferometer Space…Diganta Bandopadhyay, Christian E. A. Chapman-Bird, Alberto Vecchio·May 22, 2026SaveLearn
Buchdahl stars and bounds with cosmological constantThe Schwarzschild interior solution, when combined with the assumption of a finite central pressure, leads to the well-known Buchdahl bound. This bound establishes an upper limit on the…Christian G. Boehmer, Naresh Dadhich, Surajit Das·May 22, 2026SaveLearn
Probing Black Hole Phase Transitions through Quasi-Periodic OscillationsIn this work, we probe the well known thermodynamic phase structure of black hole through the lens of its quasi-periodic oscillations (QPOs). Can QPOs be influenced by black hole phase transitions?…Bidyut Hazarika, Prabwal Phukon·May 22, 2026SaveLearn
Particle Physics in Curved Spacetime and Dark MatterWe review recent results showing that, within the framework of quantum field theory in curved spacetime, the semiclassical energy-momentum tensor of the neutrino flavor vacuum fulfills the equation…Antonio Capolupo, Salvatore Capozziello, Gabriele Pisacane et al.·May 21, 2026SaveLearn
Geodesics and Thermodynamics of a Schwarzschild Black Hole with Hernquist Dark MatterIn this work, we investigate the physical and geometrical properties of a Schwarzschild black hole (BH) immersed in a Hernquist dark matter halo. To accomplish our purpose, one builds the BH metric…A. R. P. Moreira, A. Bouzenada, F. M. Belchior et al.·May 21, 2026SaveLearn
Horizon structure and extremal configurations of Kerr-Newman-anti-de Sitter black holes in f(R) gravityExploiting the correspondence between Kerr--Newman--(A)dS black hole solutions in general relativity and their constant-curvature counterparts in f(R) gravity, we employ a unified framework to…Alikram N. Aliev·May 21, 2026SaveLearn
Gravitational Field of a Rotating Mass on an Expanding UniverseWe present a new exact solution to Einstein's field equations that unifies the Kerr black hole with Friedmann-Lemaître-Robertson-Walker cosmology. This metric reduces to Kerr-de Sitter in the…Antonio Peña Peña·May 21, 2026SaveLearn
Another Look at the Weak-Field Limit of Generalized Hybrid Metric-Palatini GravityWe investigate the weak-field regime of generalized hybrid metric-Palatini theories, described by a generic function \(f(R,R)\), where \(R\) is the metric Ricci scalar and \(R\)…Gustavo Melgarejo, Santiago Esteban Perez Bergliaffa·May 21, 2026SaveLearn
Charged multi-sheet wormhole solutionsWe construct charged wormhole solutions with an even number of asymptotically flat regions in the four-dimensional Einstein-Maxwell-massless phantom scalar system via the Harrison transformation. The…Yusuke Makita, Keisuke Izumi, Daisuke Yoshida·May 21, 2026SaveLearn
Dimming of Photon Ring due to Photon-Axion Conversion around Kerr Black HolesWe investigate photon-axion conversion in the vicinity of rotating Kerr black holes where strong gravity traps photons on near-circular trajectories, effectively enhancing the path length. We explore…Rahul Dhyani, Sauvik Sen, Indrani Banerjee et al.·May 21, 2026SaveLearn
Cosmological Singularities and Quantum ParticlesWe study if there is an opportunity to describe quantum particles in the vicinity of three types of cosmological singularities, big bang-big crunch, big rip and big brake. Writing down the Dirac…Samuel W. P. Oliveira, Alexander Yu. Kamenshchik·May 21, 2026SaveLearn
Black hole dark monopole systemWe scrutinize properties of electrical charges bounded to visible and dark matter sectors, in the vicinity of a magnetic poles of both sectors. It turns out that the considered system has an angular…Marek Rogatko·May 21, 2026SaveLearn
Entropic route to Brown-York tensor: A unified framework for null and timelike hypersurfacesBuilding on Padmanabhan's entropy functional, originally introduced to derive Einstein's equations and highlight the emergent nature of gravity, we demonstrate its robustness in a broader…Krishnakanta Bhattacharya, Bhera Ram, Bibhas Ranjan Majhi·May 21, 2026SaveLearn
Dark Energy in Ghost-free non-local GravityGhost-free non-local gravity is investigated with regards to its late-time dynamics. Viable solutions in this model are confronted with the observational data including the Pantheon+ catalogue of…S. D. Odintsov, V. K. Oikonomou, G. S. Sharov·May 21, 2026SaveLearn
Constraints on Schwarzschild Black Hole in a Generalized Dehnen-Type (1,4,γ) Dark Matter Halo via the S2 Star Orbit around Sgr A^The distribution of dark matter (DM) halo around supermassive black holes (BHs) may leave observable imprints on stellar dynamics near galactic centers. Motivated by this, we investigate the orbital…Tursunali Xamidov, Sanjar Shaymatov, Qiang Wu·May 21, 2026SaveLearn
Analytical solutions for timelike orbits around Damour-Solodukhin wormholesWe investigate timelike geodesics around Damour-Solodukhin wormholes, which are Schwarzschild-like geometries characterized by a deformation parameter λ that determines the radius of the throat,…Shao-Chen Ho, Yo-Chung Ko, Tien Hsieh et al.·May 21, 2026SaveLearn
Holographic Dark Energy with Hubble Radius as an Infrared Cutoff in Einstein-Cartan GravityIn this work, we investigate non-interacting holographic dark energy (HDE) with the Hubble radius as the infrared cutoff in Einstein-Cartan gravity. We derive the Einstein-Cartan equations from the…Yongjun Yun, Jungjai Lee·May 21, 2026SaveLearn
Classical Renormalization Group Equations for General RelativityIn a companion paper arXiv:2510.27676, we introduced a non-perturbative classical renormalisation group (RG) flow equation as a novel method for treating strongly interacting problems in general…F. Gutiérrez, K. Falls, A. Codello·May 21, 2026SaveLearn
On the Presence of a Tertiary Compact Object in GW190814Gravitational waves from merging compact binaries are sensitive to line-of-sight acceleration (LOSA) induced by a massive companion in their vicinity. Interestingly, the leading-order contributions…Lalit Pathak, Hemantakumar Phurailatpam, Achamveedu Gopakumar·May 21, 2026SaveLearn
Vacuum breakdown in a misaligned magnetized Kerr spacetimeElectron-positron (e+e-) pair creation by vacuum breakdown around compact objects is believed to power high-energy astrophysical transients like gamma-ray bursts (GRBs). In this work, we…Ruixin Yang, Songbai Chen, Jiliang Jing·May 21, 2026SaveLearn
Quantitative Black Hole Imaging Laboratory with the Black Hole Vision App: I. Schwarzschild SpacetimeThis paper utilizes the Black Hole Vision smartphone application to catalyze a pedagogical shift in General Relativity education through the quantitative analysis of simulated black hole…Lior M. Burko·May 21, 2026SaveLearn