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
Thermodynamic Consistency of Logarithmic Entropy Corrections on the Schwarzschild Branch of f(Q) Gravity and a Superradiance No-Go ResultWe present a concise and explicit analysis of logarithmically corrected black-hole thermodynamics and scalar scattering on the Schwarzschild branch of symmetric teleparallel gravity. Treating the…Wen-Xiang Chen·Jul 10, 2026SaveLearn
Causal Horizons, Geodesic Completeness and Stability in Slow Contraction CosmologyWe show that cosmological models with a semi-infinite phase of slow contraction (ekpyrosis) possess a combination of properties that can address several fundamental problems in cosmology, otherwise…Mariam Khaldieh, Anna I. Rosenzweig, Paul J. Steinhardt·Jul 10, 2026SaveLearn
Rotating black hole shadows in metric-affine bumblebee gravityIn this work, we investigate the structure of black hole shadows in the bumblebee gravity model formulated within the metric-affine framework, which incorporates spontaneous Lorentz symmetry breaking…Jose R. Nascimento, Ana R. M. Oliveira, Albert Yu. Petrov et al.·Jul 10, 2026SaveLearn
Scalar field in Bianchi type-I cosmology with Lyra's geometryIn this study, we examine the role of a scalar field in the evolution of the Universe within the framework of a Bianchi type-I cosmological model with Lyra's geometry. Previous research has…Evgeny Petuhov, Bijan Saha·Jul 10, 2026SaveLearn
Revisiting particle circular orbits as probes of black hole phase transitionsPrevious studies suggested that the particle circular orbit can serve as a probe of black hole phase transitions. However, these studies only identified this phenomenon by substituting the horizon…Lei You, Jinsong Yang·Jul 10, 2026SaveLearn
Formation of extremal Reissner-Nordström black holes: insights from numericsAn extremal Reissner-Nordström black hole can form in finite time in the gravitational collapse of a massless charged scalar field. The proof of this is based on the method of characteristic gluing,…Maxime Gadioux, Harvey S. Reall, Jorge E. Santos·Jul 10, 2026SaveLearn
Geometric Constraints on Quantum Gravity-Inspired Dispersion RelationsModified dispersion relations (MDRs) arise in many quantum-gravity approaches, often in non-polynomial or non-analytic form beyond the reach of effective field theory (EFT). Logarithmic, exponential…Gines R. Perez Teruel·Jul 10, 2026SaveLearn
Inference with finite time series II: the window strikes backSmooth window functions are often applied to strain data when inferring the parameters describing the astrophysical sources of gravitational-wave transients. Within the LIGO-Virgo-KAGRA…Colm Talbot, Sylvia Biscoveanu, Aaron Zimmerman et al.·Jul 10, 2026SaveLearn
Probing missing physics from inspiralling compact binaries via time-frequency tracksThe orbital evolution of binary black hole (BBH) systems is determined by the component masses and spins of the black holes and the governing gravity theory. Gravitational wave (GW) signals from the…Debtroy Das, Soumen Roy, Anand S. Sengupta et al.·Jul 10, 2026SaveLearn
A note on the conformal geometry of the 2-sphereWe discuss the geometry of the two-dimensional sphere. Our perspective focuses on the set of conformal factors that rescale a given metric to a round metric. We find that there exists a unique…Jörg Frauendiener·Jul 9, 2026SaveLearn
Repetitive Penrose Process in Rotating 4D Einstein-Gauss-Bonnet Black HolesWe investigate the repetitive Penrose process for neutral particles in a rotating four-dimensional Einstein--Gauss--Bonnet black hole obtained through the modified Newman--Janis algorithm, developing…Mohammad Reza Alipour, Mohammad Ali S. Afshar, Saeed Noori Gashti·Jul 9, 2026SaveLearn