Gravitational Lensing Signatures of Hayward-like Black HolesWe examine the gravitational lensing signatures of a Hayward-like regular black hole and its potential observational distinction from a Schwarzschild black hole. In the weak-field limit, the…Chen-Hung Hsiao, Limei Yuan, Yidun Wan·Apr 16, 2026SaveLearn
Spatially covariant gravity with two degrees of freedom: A perturbative analysis up to cubic orderThere has been considerable interest in constructing modified gravity theories that propagate only two degrees of freedom (DOFs), corresponding to the tensorial gravitational waves of general…Yang Yu, Yu-Min Hu, Xian Gao·Apr 16, 2026SaveLearn
Long-lived quasinormal modes, shadows and particle motion in four-dimensional quasi-topological gravityWe investigate massive scalar perturbations and several characteristics of particle motion in the spacetime of regular black holes arising in four-dimensional quasi-topological gravity. Quasinormal…Bekir Can Lütfüoğlu·Apr 16, 2026SaveLearn
Time delay as a probe of multiple photon spheresBlack hole shadow images are primarily determined by the properties of photon spheres and can exhibit degeneracies across different spherically symmetric spacetime geometries. We show that time delay…Kajol Paithankar, Sanved Kolekar·Apr 15, 2026SaveLearn
Hidden Symmetries and Gyromagnetic Ratio of Kerr-Newman Black Holes in f(R) GravityWe explore hidden symmetries in electrically charged, four-dimensional rotating Kerr-Newman black hole within f(R) gravity. By deriving the Killing and Killing-Yano tensors, we establish their role…Göksel Daylan Esmer, Saliha Türkmen·Apr 15, 2026SaveLearn
Automatic classification pipeline for glitches in the Virgo detectorGlitches frequently contaminate data in gravitational-wave detectors, complicating the observation and analysis of astrophysical signals. This work introduces VIGILant, an automatic pipeline for…Tiago Fernandes, Francesco Di Renzo, Antonio Onofre et al.·Apr 15, 2026SaveLearn
Quasinormal Modes of pp-Wave Spacetimes and Zero Temperature DissipationWe compute the quasinormal mode spectrum of scalar perturbations on Kaigorodov pp-wave spacetimes, the horizonless gravity duals of zero temperature null fluids. The pp-wave deformation promotes the…Huayu Dai, Guangtao Zeng·Apr 15, 2026SaveLearn
Entropy considerations in Many-Body Gravity and General Relativity, and the impact on cosmic inflationMany body gravity (MBG) is a novel modified theory of gravity formulated in a 5-D space-time-temperature framework, in which the variation in temperature is recast as a variation in the 5-D metric.…S Ganesh·Apr 15, 2026SaveLearn
Hydrodynamic Analog of the Klein Paradox: Vacuum Instability and Pair Production in a Linear Elastic MediumThe Klein Paradox -- the anomalous scattering of relativistic fermions off a high potential step -- signals the limit of the single-particle interpretation of the Dirac equation. While Quantum Field…Alan F. Tinoco·Apr 15, 2026SaveLearn
Emergent structure in the binary black hole mass distribution and implications for population-based cosmologyGravitational waves provide a powerful probe of both the astrophysical processes driving black hole mergers and the dynamics of the Universe, but these measurements rely on accurately inferring the…Vasco Gennari, Tom Bertheas, Nicola Tamanini·Apr 15, 2026SaveLearn
Fast neural network surrogate for multimodal effective-one-body gravitational waveforms from generically precessing compact binariesGravitational waveform templates are a key ingredient for the detection and characterization of gravitational waves emitted by compact binary mergers in the universe. These templates must be…Christopher Whittall, Geraint Pratten·Apr 15, 2026SaveLearn
Cosmology from Transactional Entropic Gravity: A Concise ReviewThis is a review of key aspects of a model presented at the Lake Como School: Dark Matter, Dark Energy, and the Cosmological Tensions, June, 2025. The associated publication can be found at: A…R. E. Kastner, Andreas Schlatter·Apr 15, 2026SaveLearn
Finding and characterising physical states of Euclidean Abelianized loop quantum gravity using neural quantum statesWe study physical (near-kernel of constraints) states of 4-d Euclidean loop quantum gravity in Smolin's weak coupling limit on the complete graph K5 using variational Monte Carlo with neural…Hanno Sahlmann, Waleed Sherif·Apr 15, 2026SaveLearn
Singular Solutions of the Tolman Oppenheimer Volkoff Equation with a Cosmological Constant Classification and PropertiesWe study the Tolman-Oppenheimer-Volkoff equation in the presence of a cosmological constant for general thermodynamically consistent equations of state, without imposing regularity at the center.…Christos Dounis, Charis Anastopoulos·Apr 15, 2026SaveLearn
Revisiting Thermodynamics of the Hayward Black Holes and Exploring Binary Merger BoundsIn this article, we revisit the thermodynamics of Hayward black holes [1] in asymptotic flat spacetime and obtain the bounds on the final mass post merger after head-on collision event of two equal…Neeraj Kumar, Ankur Srivastav, Phongpichit Channuie·Apr 15, 2026SaveLearn
Robust parameter inference for Taiji via time-frequency contrastive learning and normalizing flowsTransient noise artifacts, commonly referred to as glitches, pose a major challenge to parameter inference for space-based gravitational-wave (GW) observations. We develop a glitch-robust amortized…Tian-Yang Sun, Bo Liang, Ji-Yu Song et al.·Apr 15, 2026SaveLearn
Basilic: An end-to-end pipeline for Bayesian burst inference and model classification in gravitational-wave dataWe present Basilic, a dedicated pipeline for Bayesian model selection and parameter estimation of short-duration gravitational-wave burst signals observable with ground-based detectors. Built on top…Iuliu Cuceu, Marie Anne Bizouard·Apr 15, 2026SaveLearn
Formation of shell-crossing singularities in effective gravitational collapse models with bounded and unbounded polymerizationsWe extend the investigation into the formation of shell-crossing singularites (SCS) in effective polymerized LTB models to the LQG-inspired asymmetric bounce model, as well as to effective LTB models…Francesco Fazzini, Kristina Giesel, Eric Rullit·Apr 15, 2026SaveLearn
Precision tests of analytical tail-term approximations for radiation reaction in Schwarzschild spacetimeWe investigate the consistency and precision of approximate analytical expressions for the electromagnetic self-force acting on a charged particle in Schwarzschild spacetime endowed with weak…Bakhtinur Juraev, Arman Tursunov, Zdeněk Stuchlík et al.·Apr 15, 2026SaveLearn
Scalarizations of magnetized Reissner-Nordström black holes induced by parity-violating and parity-preserving interactionsWe study spontaneous scalarization of a scalar field in the magnetized Reissner--Nordström spacetime induced by parity-violating and parity-preserving interactions, represented by couplings to the…Hao-Jie Lin, Tao Zhu, Jing-Fei Zhang et al.·Apr 15, 2026SaveLearn
From Ringdown to Lensing: Analytic Eikonal Modes of Quasi-Topological Regular Black HolesWe develop an analytic eikonal description of perturbations for four-dimensional regular black holes in quasi-topological gravity. Using first-order Schutz--Will WKB together with a small-coupling…Alexey Dubinsky·Apr 15, 2026SaveLearn
Investigating the effect of sensitivity of KAGRA on sky localization of gravitational-wave sources from compact binary coalescencesThe addition of KAGRA to the global gravitational-wave detector network introduces new baselines and complementary antenna response patterns that can enhance sky localization for compact binary…Alvin K. Y. Li, Peony K. K. Lai, Elwin K. Y. Li et al.·Apr 15, 2026SaveLearn
Topologically equivalent yet radiatively distinct orbits in EMRI systemMultiple potential wells for massive test particles, allowing distinct families of bound orbits to coexist, are a characteristic feature of certain exotic compact objects beyond general relativity.…Chao-Hui Wang, Shao-Wen Wei, Tao Zhu et al.·Apr 15, 2026SaveLearn
Probing Kalb-Ramond gravity with charged rotating black holes: constraints from EHT observationsThe Event Horizon Telescope (EHT) has guided strong-field gravitational physics by providing the first direct images of the supermassive black holes M87* and Sagittarius A*. The EHT observations…Towheed Ahmad Nengroo, Shafqat Ul Islam, Sushant G. Ghosh·Apr 15, 2026SaveLearn
Exact rotating dilatonic branch in ModMax electrodynamics without Maxwell analogueWe present a novel class of rotating dilatonic solutions within the framework of Einstein-ModMax-type gravity. The configuration belongs to the nonlinear sector characterized by $ F/…Leonel Bixano, Tonatiuh Matos·Apr 15, 2026SaveLearn