Distinguish Bardeen-like black holes by Gravitational lensingWe study Bardeen-like regular black holes without Cauchy horizons via gravitational lensing. In the weak field, the deflection angle receives a positive -dependent correction, producing a…Limei Yuan, Chen-Hung Hsiao, Yidun Wan·Apr 13, 2026SaveLearn
Rotating Thin Shells in Einstein-Gauss-Bonnet GravityA rotating metric solution in Einstein-Gauss-Bonnet gravity with a negative cosmological constant was recently found in the Chern-Simons point. We construct a rotating thin shell gluing two…João D. Álvares, Tiago V. Fernandes·Apr 13, 2026SaveLearn
Not too close! Evaluating the impact of the baseline on the localization of binary black holes by next-generation gravitational-wave detectorsNext-generation (XG) gravitational-wave detectors, such as Cosmic Explorer (CE) and the Einstein Telescope (ET), will observe compact binary coalescences at unprecedented rates and signal-to-noise…Francesco Iacovelli, Luca Reali, Emanuele Berti et al.·Apr 13, 2026SaveLearn
Equatorial periodic orbits and gravitational wave signatures in Euler-Heisenberg black holes surrounded by perfect fluid dark matterWe investigate equatorial periodic orbits and their gravitational wave radiation in the spacetime of an Euler--Heisenberg (EH) black hole surrounded by perfect fluid dark matter (PFDM). The combined…Dhruba Jyoti Gogoi, Jyatsnasree Bora, Ali Övgün·Apr 13, 2026SaveLearn
Beyond the Cosmological Constant: Breaking the Geometric Degeneracy of f(Q) cosmology via Redshift-Space DistortionsWe present a rigorous theoretical and observational analysis of the Hybrid f(Q) class of models by including the late-time modifying 1/Q term. After deriving strict viability conditions from…Ameya Kolhatkar, P. K. Sahoo·Apr 13, 2026SaveLearn
Gravitational lensing around a Kerr-Sen black hole in plasma backgroundWe investigate the gravitational lensing of massless particles around a Kerr-Sen black hole immersed in a magnetized, cold, pressureless plasma medium. Both homogeneous and inhomogeneous plasma…Saswati Roy, Shubham Kala, Sayanika Modak et al.·Apr 13, 2026SaveLearn
Optical Appearance of Scalarized Kerr-Newman Black Holes with Multiple Light RingsThis study investigates the optical appearance of rotating scalarized Kerr-Newman black holes in the Einstein-Maxwell-scalar theory with exponential coupling. By analyzing equatorial null geodesics,…Yiqian Chen, Li Li, Peng Wang·Apr 13, 2026SaveLearn
Helicity-supported stationary spacetimes: A class of finite-energy, horizonless, axisymmetric solutionsWe construct a class of stationary, axisymmetric, horizonless spacetimes whose curvature is generated entirely by smooth, localised differential rotation Ω(r), while the spatial geometry remains…Francisco S. N. Lobo, Tiberiu Harko·Apr 13, 2026SaveLearn
Asymptotic Throat: The Geometric Inevitability of Regular Black HolesWe reveal that a fundamental minimal length naturally replaces the Schwarzschild singularity with future infinity, formalizing the ``asymptotic throat'' as a geometric inevitability. This…Yi-Bo Liang, Hong-Rong Li·Apr 13, 2026SaveLearn
Charged Black Holes in KR-gravity Surrounded by Perfect Fluid Dark MatterIn this work, we systematically investigate the null geodesics of electrically charged black holes in a gravitational framework that incorporates Lorentz violation induced by a background Kalb-Ramond…Faizuddin Ahmed, Mohsen Fathi, Edilberto O. Silva·Apr 13, 2026SaveLearn
Generating anisotropic models for relativistic stellar objectsWe introduce a new type of generating theorems in General Relativity for anisotropic, static, spherically symmetric solutions of the Einstein field equations. The results are used to derive a class…Paulo Luz, Sante Carloni·Apr 13, 2026SaveLearn
Probing Yukawa Gravity with Modulated Newtonian Cancellation in the CHRONOS DetectorWe investigate the sensitivity of a torsion-bar gravitational-wave detector to Yukawa-type deviations from Newtonian gravity using a differential gravitational calibrator (GCal), where two rotating…Yuki Inoue, Hsiang-Yu Huang, Vivek Kumar et al.·Apr 13, 2026SaveLearn
Probing Active Galactic Nuclei and Measuring the Hubble constant with Extreme-Mass-Ratio InspiralsExtreme-mass-ratio inspirals (EMRIs) carry valuable information about their surrounding astrophysical environments. Over the course of their long-term evolution, interactions between the secondary…Jian-Dong Liu, Wen-Biao Han, Hiromichi Tagawa·Apr 13, 2026SaveLearn
Holographic is Hamiltonian, relativelyWe show that a relative holographic energy coincides with the relative Hamiltonian energy.Piotr T. Chruściel, Raphaela Wutte·Apr 13, 2026SaveLearn
Discussion on the equivalence of two relativistic point-particle LagrangiansIn 2021, Lei et al. claimed the equivalence between the two Lagrangians L1 =-mc-gμνxμxν-V and L2 = 12mgμν xμxν-V…Liubin Wang, Xin Wu·Apr 13, 2026SaveLearn
Observational constraints on the spin/anisotropy of the CCOs of Cassiopeia A, Vela Jr. and G347.3-0.5 and a single surviving continuous gravitational wave candidateWe carry out the deepest and broadest search for continuous gravitational-wave signals from three neutron stars at the center of the supernova remnants Cassiopeia A, Vela Jr., and G347.3-0.5. This…Jing Ming, Maria Alessandra Papa, Heinz-Bernd Eggenstein et al.·Apr 13, 2026SaveLearn
Post-Newtonian dynamics of charged compact binariesWe investigate the dissipative dynamics of charged compact binaries in Einstein-Maxwell theory. By evaluating the mass and electric multipole moments, we compute the gravitational and electromagnetic…Zi-Han Zhang, Tan Liu, Shuai Zhang et al.·Apr 12, 2026SaveLearn
Quasi-resonances in the vicinity of Einstein-Maxwell-dilaton black holeWe study massive scalar quasinormal spectra of charged Einstein--Maxwell--dilaton black holes by combining high-order WKB--Padé calculations with time-domain evolution. The two approaches show close…S. V. Bolokhov·Apr 12, 2026SaveLearn
Astrophysical Signatures of Einstein-Skyrme Anti-de Sitter Black Holes: Epicyclic Frequencies and QPO ConstraintsWe study the geodesic motion and epicyclic oscillations of massive test particles around a static, spherically symmetric black hole (BH) solution of the Einstein--Skyrme (ES) theory in Anti-de Sitter…Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı·Apr 12, 2026SaveLearn
Strong gravitational lensing and Quasiperiodic oscillations as a probe for an electrically charged Lorentz symmetry-violating black holeThis study examines the combined effect of electric charge and Lorentz symmetry breaking (LSB) on the observables of strong gravitational lensing (SGL) and the dynamics of quasiperiodic oscillations…Sohan Kumar Jha·Apr 12, 2026SaveLearn
Geometrically Significant Surfaces of Black Holes from a Single ScalarBlack hole spacetimes contain several geometrically distinguished hypersurfaces, including event and Cauchy horizons, stationary-limit surfaces, and curvature singularities. These structures are…Cagdas Ulus Agca, Bayram Tekin·Apr 11, 2026SaveLearn
Probing geometrically perturbed strange stars with minimal decoupling using millisecond pulsar timing observationsWe construct a gravitationally decoupled anisotropic strange star model using the minimal geometric deformation approach with a MIT bag equation of state and an additional source sector controlled by…K. N. Singh, S. K. Maurya, A. Errehymy et al.·Apr 11, 2026SaveLearn
Polytropic f(Q) cosmology and its implications for the H0 tensionUnderstanding the late-time cosmic phenomenon of the universe commonly referred to as the dark energy problem, which is one of the prominent tension in the field of theoretical as well as…Raja Solanki·Apr 11, 2026SaveLearn
Entropy covector field and macroscopic observables for rotating and non-rotating relativistic kinetic gases around a Schwarzschild black holeIn this article, we derive the components of the entropy covector field for a relativistic kinetic gas composed of collisionless, spinless, massive, and uncharged particles following bound orbits in…Carlos Gabarrete, Daniela Montoya, Roger Raudales·Apr 11, 2026SaveLearn
Analytic semiclassical backreaction of a Schwarzschild black hole in a finite cavity: horizon shift, temperature renormalization, and canonical stability in the Hartle-Hawking StateWe construct an analytic model of static semiclassical backreaction for a Schwarzschild black hole in the Hartle--Hawking state enclosed within a finite spherical cavity. Using a minimal renormalized…G. G. L. Nashed, Alnadhief H. A. Alfedeel, Tiberiu Harko·Apr 11, 2026SaveLearn