Quasinormal modes of Bonanno-Reuter black holes via the Spectral MethodIn this work, we explore the quasinormal modes (QNMs) of the Bonanno-Reuter black hole, one of the first regular black hole metric suggested by the Asymptotically Safe Gravity (ASG) program. The…Davide Batic, Denys Dutykh, Fabio Scardigli·Jul 11, 2026SaveLearn
Matter Maps to Geometry in Gravitational CollapseWe establish an exact bidirectional map between the effective homogeneous interior density of a collapsing star and the exterior metric function in generalized Oppenheimer--Snyder collapse. The…H. Khodabakhshi, Zhi-Chao Li, H. Lu et al.·Jul 11, 2026SaveLearn
Improving calibration accuracy with torque coupled gravity field calibrator for sub-Hz gravitational wave observation in CHRONOSA fundamental challenge in low-frequency gravitational-wave detectors is the limited signal-to-noise ratio (SNR) of calibration lines, particularly in torsion-bar systems where the response is…Yuki Inoue, Daiki Tanabe, Vivek Kumar·Jul 11, 2026SaveLearn
Classification of Oppenheimer-Snyder Collapse: Singular, Bouncing, and Soft-Landing ScenariosWe study Oppenheimer-Snyder (OS) gravitational collapse matched to a general static, spherically symmetric exterior spacetime. Unlike the Schwarzschild case, two new features can arise in black holes…Zhi-Chao Li, H. Khodabakhshi, H. Lu·Jul 11, 2026SaveLearn
The Influence of Stable Photon Sphere Advent on Orbital Precession in moving towards the ExtremalityIn this work, we investigate the behaviour of the periapsis shift in static charged black-hole spacetimes, focusing on the interplay between extremality and the Aschenbach-like effect. We first…Mohammad Ali S. Afshar, J. Sadeghi·Jul 11, 2026SaveLearn
Shift vector sign reversal in the Alcubierre warp drive spacetime geometry and nonlinear Burgers-type dynamicsThis work investigates a sign reversal of the shift vector in the Alcubierre Warp Drive geometry and its effect on the nonlinear reduced structure of the Einstein equations. Previous analyses showed…Osvaldo L. Santos-Pereira, Everton M. C. Abreu, Marcelo B. Ribeiro·Jul 11, 2026SaveLearn
Scalar and vector bosons in a Bonnor-Melvin-Λ spacetime: an exact Duffin-Kemmer-Petiau analysisWe study scalar and vector bosons in the Bonnor--Melvin--Λ spacetime within the Duffin--Kemmer--Petiau (DKP) formalism. By employing Umezawa's projection operators, we separate the physical…Francisco A. Cruz Neto, Luis B. Castro·Jul 10, 2026SaveLearn
Entropy and Non-Collapse in Lorentzian GeometryIn this paper, we establish a geometric correspondence between the Lorentzian Raychaudhuri equation and Perelman's non-collapsing theorem for the Ricci flow. By interpreting the Raychaudhuri…Rohit Dhormare·Jul 10, 2026SaveLearn
Exceptional lines in the Kerr-Newman black hole spectrumWe investigate massive scalar perturbations of Kerr-Newman black holes, focusing on the (,m) = (1,1) quasinormal mode spectrum in the near-extremal regime. We identify a sequence of exceptional…João Paulo Cavalcante, Maurício Richartz·Jul 10, 2026SaveLearn
Hawking Radiation in f(R) Gravity: Survival of lighter black holesEinstein's theory of general relativity (GR) has been remarkably successful in describing gravitational phenomena. However, several open questions in modern cosmology and astrophysics (e.g.…Mriganka Dutta, Panchajanya Dey, Banibrata Mukhopadhyay·Jul 10, 2026SaveLearn
GRACE: An Open-Source Framework for GPU-Accelerated Numerical RelativityWe present GRACE, a new GPU-accelerated numerical-relativity framework designed to run efficiently on heterogeneous high-performance computing platforms. Developed from scratch and built exclusively…Carlo Musolino, Christian Ecker, Konrad Topolski et al.·Jul 10, 2026SaveLearn
Perturbative aspects of analogue FLRW spacetime Jellium modelsWe study electro-acoustic perturbative modes in homogeneous, isotropic and expanding -- dubbed as Friedmann-Lemaitre-Robertson-Walker (FLRW) -- Jellium models, thereby mimicking density perturbations…Matheus E. Pereira, Hermano Velten, Francisco B. Lustosa et al.·Jul 10, 2026SaveLearn
Black-bounce spacetime and galactic rotation curves: from singularity resolution to observable gravitational effectsThe black-bounce spacetime provides a regularized modification of the Schwarzschild metric by introducing a free parameter a that eliminates the central singularity while preserving the exterior…Farook Rahaman Aritra Sanyal Saibal Ray·Jul 10, 2026SaveLearn
Compact stars in a large-tension braneworld: mildly negative Weyl coupling consistent with NICER and gravitational-wave dataWe use Bayesian inference on multi-messenger observations to constrain the parameter space of compact stars in a phenomenological braneworld model inspired by the effective Sahni--Shtanov scenario.…Samuel Isidoro dos Santos Júnior, Rafael Camargo Rodrigues de Lima, Pedro Henrique Ribeiro da Silva Moraes·Jul 10, 2026SaveLearn
Causal Space-Time Structure and non-Hausdorff Extension of Schwarzschild Black Hole InteriorCones of future and past are rigorously constructed under the horizon of black hole by completions of geodesics continued from causally connected space-time regions outside the black hole interior.…Asya Aynbund, V. V. Kiselev·Jul 10, 2026SaveLearn
Head-on Collisions of Boson Stars with Bowen-York Type Initial DataWe present a numerical relativity study of head-on collisions involving boson stars using initial data inspired by the Bowen-York initial data used to model black hole binaries with punctures. The…Jake Doherty, Pablo Laguna·Jul 10, 2026SaveLearn
Clock-noise subtraction in geometric time-delay interferometry for space-based gravitational-wave parameter estimationMillihertz gravitational-wave observations with space-based interferometers require time-delay interferometry (TDI) observables whose residual instrumental noise is sufficiently controlled for both…Rui Luo, Pan-Pan Wang, Zi-Jiang Yang et al.·Jul 10, 2026SaveLearn
Nonlinear stability of Einstein-de Sitter universesThe Einstein-de Sitter universe is the prevailing model used in cosmology to describe the cold dark matter-dominated epoch of the universe. This model is a spatially homogeneous and isotropic…Louie Bernhardt, David Fajman, Zoe Wyatt·Jul 10, 2026SaveLearn
The significance of first post-adiabatic contributions for scalar charge measurements with intermediate and extreme mass ratio inspiralsWe present the first self-force-based beyond-GR waveform model incorporating post-adiabatic orbital evolution for intermediate- and extreme-mass-ratio inspirals in theories of gravity with additional…Susanna Barsanti, Ollie Burke, Andrea Maselli et al.·Jul 10, 2026SaveLearn
Eccentricity-Modulated Phase Degeneracy and Distinguishability between Dark Matter and Accretion Disk Environmental Effects in EMRIsExtreme mass-ratio inspirals (EMRIs) are sensitive probes of weak environmental effects around massive black holes, since such effects can accumulate into observable gravitational-wave phase shifts.…Tian-hao Wu, Shu-Jun Rong·Jul 10, 2026SaveLearn
The gravitational-wave fingerprint of dynamically assembled primordial black hole cluster seeds in JWST's Little Red DotsThe James Webb Space Telescope (JWST) has revealed compact, red, overmassive accreting black holes - the so-called ``Little Red Dots'' (LRDs) - in chemically near-pristine hosts at $z5…Juan Garcia-Bellido·Jul 10, 2026SaveLearn
Influence of chemical potential to explain the maximum mass and tidal love number of strange starsWe investigate the influence of medium effects on strange quark matter and their consequences for the structural properties of compact stars. In this study, the bag constant, in the MIT bag model…Debadri Bhattacharjee, Pradip Kumar Chattopadhyay·Jul 10, 2026SaveLearn
Joint inference for gravitational-wave signal and noise glitch: Method and applicationNon-Gaussian noise transients ("glitches") in gravitational-wave observatories degrade our ability to accurately perform astrophysical inference. We present the analysis pipeline…Shun Yin Cheung, Rhiannon Udall, Derek Davis et al.·Jul 10, 2026SaveLearn
Unscreened multipole moments of the fifth force in the EFT of dark energyIt has been argued that degenerate higher-order scalar-tensor theories and the effective field theory (EFT) of dark energy are endowed with the Vainshtein mechanism, resulting in a screened fifth…Tsutomu Kobayashi, Toshiki Takadera·Jul 10, 2026SaveLearn
Testing Black Holes with Interstellar Missions: II. Flyby ProbesRecently, we demonstrated that while an interstellar mission to the nearest black hole remains highly speculative and extraordinarily challenging, it is not entirely implausible within the coming…Yi Fan, Cosimo Bambi, Leda Gao et al.·Jul 10, 2026SaveLearn