Magnetic reconnection in five-dimensional Kerr black holeIn this paper, we employ the Comisso-Asenjo magnetic reconnection (MR) mechanism to investigate energy extraction from a rapidly rotating five-dimensional Kerr black hole (BH) with single- and…Ikhtiyor Eshtursunov, Sanjar Shaymatov, Chengxun Yuan·Aug 6, 2026SaveLearn
Boltzmann equation in the 212-post-Newtonian approximationWithin the framework of the post-Newtonian 212 approximation theory, a kinetic theory for relativistic gases in the presence of gravitational fields is developed. The Boltzmann equation and…Gilberto M. Kremer·Aug 6, 2026SaveLearn
Relativistic frequency shifts in gravitational waves from axion cloudsSuperradiant instability of ultralight bosons can produce clouds around rotating black holes, whose continuous gravitational wave (GW) emission is a promising observational target. Precise…Takuya Takahashi·Aug 6, 2026SaveLearn
First Law for Nonsingular Black Holes in 2D Dilaton GravityA central issue in the thermodynamics of nonsingular black holes is the apparent violation of the first law. In this work, we use 2D dilaton gravity as a simple theoretical setting to study this…Peng Yu, Yuan Zhong·Aug 6, 2026SaveLearn
A loop quantization of the marginally bound Lemaître-Tolman-Bondi dust modelWe present a loop quantization of the marginally bound Lemaître-Tolman-Bondi (LTB) model, describing the gravitational collapse of pressureless dust in spherical symmetry. The full quantum LTB model…Luca Cafaro, Farshid Soltani·Aug 6, 2026SaveLearn
Growth factor in teleparallel Gauss-Bonnet gravityTeleparallel gravity offers a competing geometric framework on which to build cosmological models. The Gauss-Bonnet invariant captures key aspects of the underlying geometry that has been shown to be…Shivam Kumar Mishra, Jackson Levi Said, B. Mishra·Aug 6, 2026SaveLearn
Effective ΛCDM model emerging from f(Q,T) under a special EOS limit in symmetric cosmology with Bayesian and ANN observational constraintsIn this work, we investigate the cosmological consequences of an effective ΛCDM model emerging from the more general f(Q,T) gravity theory under the special equation-of-state condition $ρ+ p =…Anil Kumar Yadav, S. H. Shekh, N. Myrzakulov et al.·Aug 6, 2026SaveLearn
Universal supercritical thermodynamics for black holesWe investigate thermodynamic crossovers for black holes in the supercritical regime beyond the critical point, where small and large black holes become indistinguishable from the conventional…Shoucheng Wang, Xinyang Li, Yuliang Jin et al.·Aug 6, 2026SaveLearn
Extended Scalar Particle Solutions in Black String Spacetimes with Anisotropic QuintessenceWe present novel solutions to the Klein-Gordon equation in a black string spacetime immersed in an anisotropic quintessence fluid and surrounded by a cloud of strings (BCK spacetime). The solutions…M. L. Deglmann, B. V. Simão, C. C. Barros·Aug 6, 2026SaveLearn
Absorption spectrum and greybody factors of charged black holes in loop quantum gravityIn the last few decades, singularity-free black holes (BHs) obtained in the framework of Loop Quantum Gravity (LQG) have gained attention in the literature. These compact objects replace the…Marco A. A. de Paula, Valdir B. Bezerra, Luiz C. S. Leite·Aug 5, 2026SaveLearn
The glow of eternal black holesWe compute the optical appearance of a maximally extended (eternal) Schwarzschild black hole surrounded by a geometrically thin accretion disk. Unlike astrophysical black holes formed by…Vladimir Strokov·Aug 5, 2026SaveLearn
Living on the Edge of Effective Field Theory: Near-Extremal Black Holes in Quadratic GravityNear-extremal black holes can amplify higher-derivative corrections to general relativity, making them sharp probes of the perturbative control of gravitational effective field theory. We study this…Kelvin Ka-Ho Lam, Gary T. Horowitz, Nicolás Yunes·Aug 5, 2026SaveLearn
Correlation-based Modeling of Seismic Newtonian Noise in Half-Space and Full-Space MediaSeismic Newtonian noise, arising from fluctuating gravitational forces on detector test masses due to ambient seismic activity, represents a fundamental sensitivity limit for low-frequency…Mohamed Samy, Jan Harms, Tomislav Andric·Aug 5, 2026SaveLearn
Post-Inflationary Constraints on Nonminimally Coupled Quintessential InflationWe investigate quintessential inflation in a nonminimally coupled scalar-tensor theory, parameterizing the post-inflationary radiation abundance independently of the reheating mechanism. The…Min Gi Park, Seong Chan Park, Tomo Takahashi et al.·Aug 5, 2026SaveLearn
Multipolar static tidal response of Schwarzschild black holes in cubic gravity: a metric-action derivation of tidal runningStatic tidal Love numbers of four-dimensional Schwarzschild black holes vanish in general relativity, whereas higher-curvature interactions can generate a nontrivial response. We investigate the…Edilberto O. Silva·Aug 5, 2026SaveLearn
Evolution of matter perturbations in the context of cosmic slowing downWe investigate dynamical, time-evolving dark-energy models exhibiting phantom behaviour within Einstein gravity by analysing the evolution of matter perturbations. In particular, we consider five…D. Koh Cuende, G. Panotopoulos·Aug 5, 2026SaveLearn
Newtonian Potential in Weyl GravitoelectromagnetismThe gauge structure of the Weyl Gravitoelectromagnetic (GEM) formalism has been investigated, showing that although the theory admits additional propagating modes, only an effective spin-2 sector…L. A. S. Evangelista, A. F. Santos·Aug 5, 2026SaveLearn
Ambiguity in matter sector for modified gravity involving δ2 Lm/δgμνδgαβ and its implications to astrophysics and cosmologyMatter density (ρ) and radial pressure (p) are often used as the matter Lagrangian density (Lm) because both are thermodynamically consistent and produce the same Einstein field…B. N. Jayawiguna, A. Sulaksono·Aug 5, 2026SaveLearn
Relativistic Signatures of Dark Matter Equations of State in Static Spherically Symmetric SpacetimesWe study how three physically motivated dark matter equations of state alter the spacetime geometry of static, spherically symmetric black holes in General Relativity. The models considered are…Akash Yadav, Sudhava Yadav, K. K. Venkataratnam·Aug 5, 2026SaveLearn
A smooth BTZ black bounce with an extremal null throatWe study a static, circularly symmetric deformation of the non-rotating BTZ black hole obtained by inserting a smooth transition function into the inverse radial metric component,…Farzad Milani·Aug 5, 2026SaveLearn
Magnetic Reconnection and Energy Extraction from a Rotating Black Hole in a Four-dimensional Einstein-Gauss-Bonnet GravityRecently, Comisso and Asenjo proposed a new mechanism for energy extraction based on magnetic reconnection of plasma within the ergosphere. In this paper, we analyze the power and efficiency of…Abdul Malik Sultan, Muhammad Israr Aslam, Muhammad Nawaz et al.·Aug 5, 2026SaveLearn
Masking Black Hole Spin with a Modified Chaplygin Gas Envelope: Radiative Degeneracies from a Phenomenological Three-Region SpacetimeTheoretical interpretations of horizon-scale observations often rely on the idealized assumption of an isolated vacuum Kerr geometry. However, astrophysical black holes are expected to be embedded…Sandip Dutta·Aug 5, 2026SaveLearn
Corrections to Hawking radiation from asteroid-mass primordial black holes: analytic and numerical evaluation of the stochastic charge effectHawking radiation sets stringent constraints on Primordial Black Holes (PBHs) as a dark matter candidate in the M 1016 g regime based on the evaporation products produced by the black hole,…Gabriel Vasquez, Bowen Chen, Cara Nel et al.·Aug 5, 2026SaveLearn
Gravitational Enstrophy: Local Geometric Origin and Inverse-Cascade ConstraintsTwo-dimensional fluids conserve energy and enstrophy, driving inverse energy cascades via Fjørtoft's argument. We show General Relativity admits an analogous structure: for linear radiative…Luis Lehner·Aug 5, 2026SaveLearn
Topologically Charged Morris-Thorne-type Wormholes and the Energy ConditionsIn this paper, we investigate topologically charged Morris-Thorne-type traversable wormholes by solving the Einstein field equations with an anisotropic fluid as the energy-momentum tensor and…Faizuddin Ahmed, Md Sabir Ali, Adnan Malik·Aug 5, 2026SaveLearn