Quasinormal modes of Type I perturbations of dilaton-Euler-Heisenberg black holesWe study the type I quasinormal modes (QNMs) of magnetically charged dilaton--Euler--Heisenberg (dEH) black holes, where axial gravitational and polar electromagnetic perturbations are coupled.…Yu-Xuan Wang, De-Cheng Zou, Yun Soo Myung et al.·Oct 22, 2026SaveLearn
The subcritical accelerating Schwarzschild-Bertotti-Robinson familyWe identify the general finite- neutral Alekseev--Astorino Schwarzschild--Bertotti--Robinson family with the subcritical branch of the independently obtained accelerating…Kenneth Hong·Oct 22, 2026SaveLearn
Parameter Constraints on f(R1+ε,TμνTμν) Gravity from Exotic Compact ObjectsAccording to General Relativity (GR), gravity is described as the curvature of spacetime caused by mass and energy. Although GR has been highly successful in describing gravitational phenomena,…S. Wilhelmina, B. N. Jayawiguna, A. Sulaksono·Oct 22, 2026SaveLearn
Constraints on the number of inner horizons from gravitational Noether chargesA central question in the study of black hole interiors is how matter and geometry constrain the number of horizons. In Einstein gravity, one known method is to use the ADM decomposition of the field…Jing-Peng Ye, Run-Qiu Yang·Oct 22, 2026SaveLearn
Axial Perturbations of Extended Tolman III in the New f(R,T) TheoryWe investigate compact objects using the extended Tolman III equation of state in the framework of f(R,T)=R+2χT gravity. In the matter sector of the Lagrangian density, we employ a new formalism…B. N. Jayawiguna, G. A. Sabian, H. S. Ramadhan et al.·Oct 22, 2026SaveLearn
Matter Induced Bounds: Photon Ring, Lyapunov Exponent, Induced TemperatureWe investigate analytic bounds on the equatorial photon ring radius and the Lyapunov exponent in rotating black holes containing anisotropic matter. For a constant equatorial equation-of-state…Hocheol Lee, Bogeun Gwak·Oct 22, 2026SaveLearn
Decoherence of the quantum superradiant cloud from graviton emissionBlack hole superradiance amplifies vacuum fluctuations into a macroscopic cloud of a massive bosonic field around a rotating black hole. Under free evolution, the quantum cloud is a two-mode squeezed…Lingyun Fu, Hidetoshi Omiya, Takahiro Tanaka et al.·Oct 22, 2026SaveLearn
Multi-orbit S-star probes of Lorentz violation at the Galactic CenterWe investigate the potential of Galactic-center S-star observations to probe Lorentz violation in the minimal pure-gravity Standard-Model Extension (SME), focusing on parameter degeneracies…Jia-Yuan Fang, Jian-Ming Yan, Zong-Kuan Guo·Oct 22, 2026SaveLearn
Perturbations, eikonal limit and Hawking radiation of diverse external fields in a non-minimal charged black holeWe compare the quasinormal modes (QNMs), greybody factors, and Hawking emission of massless scalar, electromagnetic, and Dirac test fields propagating on a non-minimal Einstein--Yang--Mills black…Yinan Jia, Zhen-Hao Yang, Xiao-Mei Kuang·Oct 22, 2026SaveLearn
Anisotropic Dark Matter Stars with a Pressure-Sourced Dark Energy DensityIf the dark sector is not inert, the vacuum energy trapped inside a dark matter star need not equal its cosmological value, but may instead respond to the star's own density and pressure. We show…Qazi Abdul Ghafoor, Ilídio Lopes\·Oct 21, 2026SaveLearn
Gravitational waves from inclined orbits around Kerr black holesExtreme mass ratio inspirals on generic inclined orbits provide a critical dynamical probe of strong field gravity, as they uniquely break the severe parameter degeneracies inherent to planar…Yi-Han Huang, Sen Guo, Yu Liang et al.·Oct 21, 2026SaveLearn
Conformal geodesics and the hyperboloid at timelike infinityA description of scattering in asymptotically flat spacetimes that includes both radiation and massive asymptotic states requires control of the relation between null and timelike infinity. Motivated…Achilleas V. Koukas, Mariem Magdy, Juan A. Valiente Kroon·Oct 21, 2026SaveLearn
Black Hole Shadows and Quasinormal Modes with Dark Matter at the HorizonIn this work, we study the effect of a surrounding dark matter halo on two horizon-scale observables of a black hole: its shadow and quasinormal-mode spectrum. We consider a Schwarzschild black hole…Armin Sadeghi, Javad T. Firouzjaee, Saeed Fakhry·Oct 21, 2026SaveLearn
Quintaverse-Phantiverse Cosmologies in f(Q,C) Gravity: a Non-coincident Geometrical Origin of Cosmic AccelerationWe investigate the asymptotic dark energy sectors of a quadratic form of f(Q,C) Lagrangian. We reformulate the original equations of motion to obtain the equivalent dynamical system, for two…Hamid Shabani, Avik De·Oct 21, 2026SaveLearn
Accurate initial data for Cauchy-characteristic evolutionAccurate gravitational-wave (GW) templates from numerical-relativity (NR) simulations are essential for GW science. These templates are typically computed at finite radii and extrapolated to future…Guido Da Re, Keefe Mitman, Leo C. Stein et al.·Oct 21, 2026SaveLearn
Calculating gravitational waves at infinity: the missing linkGravitational-wave science requires waveform templates to be computed at future null infinity, the asymptotic boundary of spacetime. Numerical solutions of Einstein's equations typically rely on…Guido Da Re, Keefe Mitman, Leo C. Stein et al.·Oct 21, 2026SaveLearn
Ricci-flat Seeds, Trombone Rescaling and Magnetizing Kerr Black HolesWe present a new family of Ricci-flat rotating metrics, which we refer to as Solution II, obtained by demagnetizing the genuine Kerr-Bertotti-Robinson (G-KBR) black hole. Together with Solution I,…Liang Ma, H. Lu·Oct 21, 2026SaveLearn
Wormhole geometries and energy conditions in linear and non-linear f(Q,Lm) gravityThis study explores static and spherically symmetric wormhole configurations in an extended formulation of symmetric teleparallel gravity governed by f(Q,Lm)=α(-Q)+βLm and f(Q,Lm)= -Q+Lmα …Sara Rastgoo, Foad Parsaei·Oct 21, 2026SaveLearn
Partial geometrization of dark matter in metric f(R) gravity: Exact reconstruction and growth constraintsWe ask what fraction of dark matter can be accounted for by the geometry of a stable metric f(R) theory, requiring the expansion history to be exactly equal to that of the ΛCDM model. Only a…Davide Campanella Galanti, Oliver F. Piattella·Oct 21, 2026SaveLearn
Inaccessibility of the Cosmological Singularity to Quantum ProbesWe propose an operational resolution of the FLRW big bang singularity using quantum probes satisfying a curvature coupled Klein-Gordon equation. Applying the Madelung-Bohm decomposition of a…Vishnulal Cheriyodathillathu, Saurya Das, Soumen Basak et al.·Oct 21, 2026SaveLearn
Post-adiabatic effective-one-body waveforms for coalescing compact binariesI apply and extend the formalism of osculating orbits of Damour et al. (2004) and Lynch et al. (2026) to eccentric effective one body (EOB) models, in order to obtain an efficient yet accurate…Rossella Gamba·Oct 21, 2026SaveLearn
Exceptional points and hysteresis in Kerr-Newman quasi-normal modesExceptional points (EPs) and eigenstate hysteresis, previously found in Kerr only with an auxiliary scalar field, arise intrinsically in the quasinormal-mode spectrum of Kerr-Newman black holes.…Mario Misas Arcos, Alberto T. Pérez, Carlos F. Sopuerta·Oct 21, 2026SaveLearn
Modeling QNMs-Filtered Gravitational Waveforms: Approximation Limits and Filtering EffectsThe waveform left after quasinormal modes filtering of binary gravitational waveforms, often called the direct wave, has recently attracted considerable debate. Analytic models of this residual…Jun-Xi Shi, Zhen-Tao He, Tingyuan Jiang et al.·Oct 21, 2026SaveLearn
Local tests of Schwarzschild-Bertotti-Robinson spacetimeWe study weak field local tests of Schwarzschild-Bertotti-Robinson spacetime, which describes a static black hole embedded in an external magnetic field. Perihelion precession, deflection of light…Fatma Kutlu, Livanur Çelik, Özgür Delice·Oct 21, 2026SaveLearn
Rotation slows the instability of Ellis-Bronnikov wormholesWe present nonlinear 3+1 evolutions of rotating Ellis-Bronnikov wormholes. We construct stationary rotating drainhole solutions with a spectral solver up to an equatorial rotation velocity of 99% of…Nikita M. Shirokov, Ilya Nachevsky·Oct 21, 2026SaveLearn