A Broadband Room-Temperature Design for the Einstein TelescopeThe unique underground location of the Einstein Telescope (ET) is expected to substantially suppress seismic and gravity-gradient noise, providing a favorable environment for gravitational-wave…Teng Zhang, Amit Singh Ubhi, Huan Yang et al.·Oct 21, 2026SaveLearn
Semiclassical effects on ultramassive spacetimesA recent work [Senovilla, Port. Math. 80 (2023)] has shown that accretion of matter by a Schwarzschild-de Sitter black hole can take this object beyond a critical limit where the event and…Valentin Boyanov, Luis J. Garay, Alberto García Martín-Caro et al.·Oct 21, 2026SaveLearn
Efficient Eccentric and Quasicircular Effective-One-Body Waveforms via Near-Identity Averaging TransformationsNext-generation gravitational-wave detectors, such as LISA, the Einstein Telescope, and Cosmic Explorer, will require accurate and efficient models of long-lived, eccentric black-hole binary signals.…Philip Lynch, Alessandra Buonanno, Aldo Gamboa et al.·Oct 21, 2026SaveLearn
Kinematic and Dynamic Parameters of Anisotropic Models with Inflaton, Without A Priori Relation Between the Scale Factors and with A Posteriori IsotropizationIn this work, we present a detailed review of the calculations concerning homogeneous and anisotropic cosmological models, with particular emphasis on the Kantowski-Sachs cosmological model. As an…Maressa Perovano, Wesley Spalanza, Breno Barreto da Silva et al.·Oct 21, 2026SaveLearn
SpinOctopus: A Versatile, User-Friendly, and Extensible Public Code for General-Relativistic Ray-Tracing in axisymmetric spacetimeRelativistic ray-tracing algorithms serve as indispensable numerical tools for investigating gravitational theories and high-energy astrophysics. In this paper, we develop and release SpinOctopus, a…Shiyang Hu, Dan Li, Chen Deng et al.·Oct 21, 2026SaveLearn
An end-to-end function for the photograph of a Schwarzschild black holeWe show that the photograph of a Schwarzschild black hole can be written in closed form. The image plane is embedded as a plane tangent to a sphere centred on the black hole, and the map between a…Ping Li, Jun Cheng, Jiang-he Yang·Oct 21, 2026SaveLearn
Orientation-dependent sensitivity of the all-sky all-frequency gravitational-wave radiometer search to continuous-wave sourcesThe all-sky all-frequency (ASAF) gravitational-wave radiometer search cross-correlates the data of two detectors with equal weight on the + and × tensor polarizations. This is optimal for an…Stavros Venikoudis, Giacomo Bruno·Oct 21, 2026SaveLearn
Tomimatsu--Sato δ=2 Solution in Kaluza--Klein TheoryWe construct the Kaluza-Klein electric dressing of the Tomimatsu-Sato δ=2 vacuum spacetime by uplifting to five dimensions, boosting along the compact direction and reducing to…Haryanto M. Siahaan, Masoud Ghezelbash·Oct 21, 2026SaveLearn
How general relativity stacks up: Testing gravity by coherently combining gravitational-wave observationsA core mission of gravitational-wave astronomy is to test general relativity (GR) in the high-curvature, high-velocity regime. The field has already seen significant progress in this space, though a…Lachlan Passenger, Nir Guttman, Paul D. Lasky et al.·Oct 21, 2026SaveLearn
Wormholes in Vegh--dRGT massive gravity: a null-energy transparency theorem, horizon obstruction, and exact isotropic solutionsWe study static, spherically symmetric wormholes in deRham--Gabadadze--Tolley massive gravity with the spatially degenerate Vegh reference metric. The effective fluid carried by the massive graviton…Sudan Hansraj, Ayan Banerjee·Oct 21, 2026SaveLearn
Harmonic branches of Einstein--Maxwell--scalar field gravity: exact solutions and regularityWe relate black-hole horizons and wormhole throats to the geometry of the harmonic branches of Einstein--Maxwell--dilaton gravity. In the unified Ernst framework, we first solve the harmonic…Leonel Bixano, Tonatiuh Matos·Oct 21, 2026SaveLearn
Finite Mass Response to Vanishing Perturbations at Cauchy HorizonsSmooth transverse perturbations with vanishing Lp norm, for fixed finite p4, can leave a finite positive mass increment at a Cauchy horizon. We prove this at a critical surface-gravity…Yi-kun Li·Oct 20, 2026SaveLearn
Flexible Proposal Distributions for Gravitational-Wave Population Inference with Gaussian Mixture ModelsPopulation analyses of gravitational-wave (GW) sources use hierarchical Bayesian inference to constrain astrophysical models while accounting for selection effects. The likelihood is usually…Simon M. C. Yeung, Ignacio Magaña Hernandez, Jolien Creighton·Oct 20, 2026SaveLearn
Fields on accelerating and super accelerating black holes: stability, quasinormal modes, greybody factors and strong cosmic censorshipWe investigate the propagation of massless scalar, Dirac, and Maxwell fields on accelerating and super accelerating black hole spacetimes described by the C-metric. The latter regime has only…Francisco Silva·Oct 20, 2026SaveLearn
Lamb shift of rotational energy levels in quantum gravityOne of the major challenges of modern foundational physics is the combination of quantum physics and general relativity into a theory of quantum gravity. A severe obstacle are the required extremely…Oliver Benz, Marius Krumm, Wolfgang Wieland·Oct 20, 2026SaveLearn
Noisy Pipelines I: An end-to-end pipeline to perform multivariate noise inference for LISAInstrumental data from the Laser Interferometer Space Antenna (LISA) must be post-processed prior to any global-fit based analysis. For example, it is critical to filter, downsample, segment and…Ollie Burke, Joseph Bayley, Charlie Hoy et al.·Oct 20, 2026SaveLearn
Monopole stability of time-dependent, spherically symmetric backgrounds in Horndeski theoryWe study linear perturbations about an arbitrary time-dependent, spherically symmetric background in the most general Horndeski theory. The odd-parity sector of such perturbations, analyzed…K. Kiselev, V. Volkova·Oct 20, 2026SaveLearn
Finite-range hair from a nonlocal matter sector: charged Yukawa black holesWe construct a new exact charged, static and spherically symmetric black-hole solution of the Einstein--Maxwell equations with an additional anisotropic matter sector, whose metric is the…Francisco Tello-Ortiz, Hishan Farfán-Bachiloglu, Alejandro Rueda et al.·Oct 20, 2026SaveLearn
Quantum Bianchi IX Anisotropies as Inflationary Relics in the Primordial SpectrumStarting from the WheelerDeWitt equation, we investigate whether quantum anisotropies can survive inflation as relics of the preinflationary geometry and leave an imprint on the primordial curvature…Vittorio D'Alelio, Giovanni Montani·Oct 20, 2026SaveLearn
Geometrically Induced Semiclassical Limit for Quasinormal Modes and Greybody Factors in Higher-Dimensional Near-Ultracold spacetimesIn this work, we investigate the correspondence between quasinormal modes (QNMs) and greybody factors (GBFs) in higher-dimensional Reissner--Nordstöm--de Sitter black holes based on the massless…Bogeun Gwak·Oct 20, 2026SaveLearn
Topological ModMax--AdS Black Holes: Extremality, Charge Normalization, and Limits of WGC DiagnosticsWe study four-dimensional topological anti-de Sitter black holes sourced by ModMax electrodynamics and its sign-reversed counterpart. Distinguishing the field-strength amplitude from the conserved…Saeed Noori Gashti, Behnam Pourhassan, Saheb Soroushfar·Oct 20, 2026SaveLearn
On the Stability of Tolman Oppenheimer Volkoff FireholesWe investigate the radial stability of singular Tolman--Oppenheimer--Volkoff fireholes with a radiation equation of state. These configurations contain a naked, negative point-mass singularity…Pablo Laguna, Octavio Guerrero, Kostas Kokkotas·Oct 20, 2026SaveLearn
Thin-Shell Wormholes in Born--Infeld-Type Magnetic SpacetimesWe investigate the radial stability, thermodynamic balance, and bilateral disk images of symmetric thin-shell wormholes built from Born--Infeld-type magnetic exteriors. The exact lapse and junction…Jonathan A. Rebouças, Edson Otoniel, Muhammad Israr Aslam et al.·Oct 20, 2026SaveLearn
Geometric Quantum Discord in Schwarzschild de Sitter SpacetimeWe investigate geometric quantum discord for massless Dirac field modes in Schwarzschild-de Sitter spacetime, focusing on the distinct thermal effects of the black hole and cosmological horizons. For…Xukun Wang, Tinggui Zhang, Xiaofen Huang·Oct 20, 2026SaveLearn
Untangling Extreme Mass Ratio Inspirals and Massive Black Hole Binaries in LISA DataThe Laser Interferometer Space Antenna (LISA) will observe sources in the millihertz regime, such as Galactic Binaries (GBs), Massive Black Hole Binaries (MBHBs), and Extreme Mass Ratio Inspirals…Rishav Agrawal, Clémence Allietta, Ollie Burke et al.·Oct 20, 2026SaveLearn