A Physical space derivation of Morawetz-Energy estimates in Kerr spacetimes with large angular momentumWe revisit the derivation of Morawetz--energy estimates for scalar wave equations in the domain of outer communication of a Kerr spacetime \((a,m)\). Our goal is to develop robust physical-space…Lili He, Sergiu Klainerman·Jul 9, 2026SaveLearn
Probing Rotating Einstein-Power-Yang-Mills Black Holes through Shadows and Quasinormal Modes: Prospects for Event Horizon Telescope ConstraintsWithin Einstein power-Yang-Mills gravity (EPYM), we build a rotating black hole via the Newman-Janis procedure applied to the spherically symmetric static seed, obtaining a Kerr-like metric…I. Ezzaki, A. El Boukili, H. Lekbich et al.·Jul 9, 2026SaveLearn
Generalized Fisher-Janis-Newman-Winicour (FJNW) and Yilmaz-Rosen solutions in the higher-dimensional scalar-tensor theory with nonminimal couplingThis paper investigates higher-dimensional scalar-tensor theories of gravity with nonminimal coupling, focusing on the reconstruction of exact spherically symmetric solutions. We systematically apply…K. K. Ernazarov·Jul 9, 2026SaveLearn
A Small-Throat Boundary Condition for the Tunneling Wave Function of the UniverseWe propose a small-throat prescription for the wave function of a closed universe in the Lorentzian path integral formalism, motivated by the idea that universe creation may be obtained as the…Masaki Yamada·Jul 9, 2026SaveLearn
Einstein--Gauss--Bonnet Inflationary Cosmology in Phase-θ FormalismA central challenge in testing inflationary scenarios with cosmic microwave background (CMB) data is to derive predictions for cosmological observables that remain accurate beyond the slow-roll…Gevorg D. Manucharyan, Igor V. Fomin, Shivam Kumar Mishra et al.·Jul 9, 2026SaveLearn
Shadows and lensing signatures of a rotating black hole in a Hernquist dark matter haloWe investigate the optical properties of a rotating black hole immersed in a Hernquist dark matter halo. The spacetime is generated from a static Hernquist black hole through the noncomplexification…A. A. Araújo Filho, Arun Kumar, N. Heidari et al.·Jul 9, 2026SaveLearn
Beyond black hole spectroscopy: Quasinormal mode contamination by massless scalarsTesting General Relativity (GR) with black hole ringdowns has conventionally focused on attempting to detect shifts away from the quasinormal mode (QNM) frequencies of the Kerr metric. It has…Miguel Yulo Asuncion, Giovanni D'Addario, Thomas P. Sotiriou·Jul 9, 2026SaveLearn
Search for strong lensing of gravitational waves in the binary black hole events from O1-O4aA small fraction of the gravitational waves (GWs) currently observable by LIGO, Virgo, and KAGRA (LVK) may be strongly lensed by intervening galaxies and galaxy clusters, potentially producing…Ankur Barsode, Koustav N. Maity, Parameswaran Ajith·Jul 9, 2026SaveLearn
Signal-to-Noise Ratio Contours for LISAThe Laser Interferometer Space Antenna (LISA) will search for a stochastic gravitational-wave (GW) background at millihertz frequencies, from both astrophysical and cosmological sources, and thereby…Kai Schmitz, Joseph D. Romano·Jul 9, 2026SaveLearn
Quasi-bound states and late-time evolution of a massive fermion around a Reissner-Nordström black holeA massive fermion around a charged black hole provides a gravitational analogue of atomic bound states and their relaxation. In this work, we study this system by formulating the radial equation as a…Guang-Shang Chen, Cheng-Bo Yang, Shou-Shan Bao et al.·Jul 9, 2026SaveLearn
Spectroscopic structure of Non-Hermitian PT-Symmetric Klein--Gordon Fields in a Magnetized Cosmic String SpacetimeWe investigate non-Hermitian PT-symmetric Klein--Gordon (KG) fields in a magnetized cosmic string spacetime. A complex non-minimal scalar interaction,…Omar Mustafa, Abdullah Guvendi·Jul 9, 2026SaveLearn
Field Theoretic Aspects of Gravity From Direct Action to Quantum FieldsOne of the technical anchors of JVN's research was the "action-at-a-distance" view of gravitational interaction, driven by "Mach's Principle" addressing the origin of inertia.…Ghanashyam Date·Jul 9, 2026SaveLearn
An analytic model for a total process of gravitational collapse: From star to Schwarzschild black holeWe present an exact analytical model describing a complete gravitational collapse of matter from horizonless initial conditions to black hole formation, tracing the full evolution of the horizon…Sinya Aoki, Jorge Ovalle·Jul 9, 2026SaveLearn
Reconstructing f(R) gravity from Viaggiu Holographic Dark Energy under Hubble, Event Horizon and Granda Oliveros cutoffsThis work explores the reconstruction of f(R) gravity within the framework of newly proposed Viaggiu holographic dark energy (VHDE), which incorporates entropy corrections due to the dynamical…Arushi Jhunjhunwala, Sayani Maity·Jul 9, 2026SaveLearn
Horizon-Evanescent Scalar Clouds from Coupled Rotation and Magnetic Fields around Black HolesWe show that black-hole rotation and an external magnetic field can jointly generate a qualitatively new class of scalar cloud. Using the Kerr-Bertotti-Robinson geometry as a separable laboratory for…Hengyu Xu, Haowei Chen, Shao-Jun Zhang·Jul 9, 2026SaveLearn
Exact solutions using power law scalar potential in the Saez-Ballester-K-essence like theoryWe investigate a K-essence like cosmological model whose scalar-field potential is constructed from a negative power-law Sáez--Ballester potential. By means of a suitable field redefinition from ϕ…J. Socorro, A. Gil-Ocaranza, Ximena López-Mujica et al.·Jul 9, 2026SaveLearn
An explicit and differentiable Wilson-Daubechies-Meyer transform for gravitational-wave data analysisThe Wilson-Daubechies-Meyer (WDM) time-frequency transform has been widely used in gravitational-wave astronomy, yet a self-contained, mathematically explicit reference for practitioners remains…Avi Vajpeyi, Giorgio Mentasti, Quentin Baghi et al.·Jul 9, 2026SaveLearn
Shirokov and Shapiro Effects in the Hartle-Thorne SpacetimeWe investigate the influence of rotation and quadrupole deformations of astrophysical compact objects on the Shirokov and Shapiro effects within the Hartle-Thorne spacetime, which describes the…Anuar Idrissov, Kuantay Boshkayev, Serzhan Momynov et al.·Jul 9, 2026SaveLearn
Gauge-independent approach to inflation in quadratic gravityWe investigate the scalar sector of linear cosmological perturbations in quadratic gravity. Working in the Einstein frame, we derive the equations of motion in a gauge-independent manner and express…Adrian Palomares, Ying-li Zhang, Jinsu Kim·Jul 9, 2026SaveLearn
labrador: A domain-optimized machine-learning tool for gravitational wave inferenceFast and reliable inference of gravitational-wave source parameters is crucial for analyzing large catalogs that are reaching the size of hundreds of detections, and for identifying short-lived…Javier Roulet, Marco Crisostomi, Lucy M. Thomas et al.·Jul 9, 2026SaveLearn
Effective geometrostatics of spherical stars beyond general relativityWe provide a set of general tools to study the problem of stellar equilibrium in any gravitational theory in which spherically symmetric spacetimes satisfy master field equations taking the form of…Julio Arrechea, Raúl Carballo-Rubio, Matt Visser·Jul 9, 2026SaveLearn
Coupled-Channel Spectral Theory for a Non-Separable Rotating Geometry: Normal Modes and Two-Boundary Response in the Rotating AdS-Teo WormholeWe investigate scalar perturbations of a rotating asymptotically anti-de Sitter (AdS)Teo traversable wormhole with a controlled nonseparable angular deformation. The geometry retains a regular…Ramesh Radhakrishnan, Gerald B. Cleaver, William Julius·Jul 9, 2026SaveLearn
The measurable impact of the 2pN spin-dependent accelerations on the jet precession of M87^Motivated by recent accurate measurements of disk/jet coprecessions around some galactic supermassive black holes, the accelerations experienced by an uncharged, spinless object in the Kerr metric,…Lorenzo Iorio·Jul 9, 2026SaveLearn
Two-Dimensional Pulsar Distance Inference from Nanohertz Gravitational WavesPulsar timing arrays (PTAs) are limited in localizing nanohertz continuous gravitational waves (CGWs) by uncertainties in pulsar distances. We introduce a method to infer pulsar distances in two…Si-Ren Xiao, Ji-Yu Song, Yue Shao et al.·Jul 9, 2026SaveLearn
Boson Stars in D 4 Dimensions: Stability, Oscillation Frequencies, and Dynamical EvolutionsWe construct spherically symmetric boson star solutions in D ∈ \4,5,6\ spacetime dimensions, considering the effects of both a quartic self-interaction term and a solitonic potential. We then…Gareth Arturo Marks, Abdullah Al Zaif·Jul 9, 2026SaveLearn