271 papers
This paper presents a unified analytic treatment of Kerr-Newman-de Sitter black holes in constant-curvature gravity, deriving closed-form expressions for horizon radii and extremality conditions to reveal non-universal bounds and unique ultra-extremal configurations that differ from general relativity.
Using cross-correlation data from Advanced LIGO and Advanced Virgo during their third observing run, this study establishes a $95\%0.01~M_\odot c^2$ on the gravitational-wave energy emitted by core-collapse supernovae, representing a two-order-of-magnitude improvement over previous constraints and suggesting that third-generation detectors will likely detect individual supernova events before the gravitational-wave background.
This paper proposes that compact, non-singular horizonless objects characterized by a regulator length scale support stable inner orbits that generate observable very-high-frequency quasi-periodic oscillations (VHFQPOs) ranging from 1 kHz to 25 kHz, suggesting that the absence of such signals in X-ray binaries would confirm the existence of an event horizon around the central object.
This paper proposes a general series-based pseudo-Newtonian potential with tunable coefficients that can be customized to accurately replicate specific Schwarzschild geodesic features, such as the innermost stable circular orbit, marginally bound orbits, and periapsis advance, outperforming existing models like the Paczynski-Wiita potential.
This paper proposes a novel Local Maxima Particle Swarm Optimization (LMPSO) algorithm to simultaneously detect thousands of low signal-to-noise Galactic binary gravitational wave signals, effectively overcoming signal subtraction contamination and achieving a lower false alarm rate than existing iterative methods.
This paper introduces a multitask surrogate model for neutron star equations of state that achieves near-perfect physical validity classification and high-precision regression of key stellar properties while providing distribution-free, certified uncertainty estimates through the novel application of Mondrian conformal prediction.
This paper establishes an exact non-Markovian framework for neutrino decoherence in red turbulent matter using Nakajima--Zwanzig projection and fractional calculus, deriving an analytical solution in terms of Mittag-Leffler functions that links flavor evolution to anomalous diffusion while addressing ultraviolet singularities via Hadamard finite parts.
This paper presents multiband observations and hybrid modeling of SN 2024abvb, identifying it as a luminous Type Icn supernova with a low ejecta mass resulting from significant progenitor mass stripping, as evidenced by its early C II emission lines and lack of hydrogen or helium features.
This study models dust formation in Type Iax supernovae ejecta and concludes that, unlike typical Type Ia supernovae, this low-luminosity subclass is a significant producer of iron-rich silicate dust, potentially locking up a large fraction of iron in grains with a dust-to-ejecta mass ratio orders of magnitude higher.
Using SRG/eROSITA data from 680 galaxy clusters, this study detects shock-heated gas extending to 4.5 Mpc, identifies the virial radius as the transition point where cosmic filaments connect to clusters, and finds that observed gas distribution at large radii is more efficient than predicted by IllustrisTNG simulations.
This paper establishes a framework demonstrating that upcoming high-precision measurements of the kaon-to-pion ratio at LHCb and FASER can robustly constrain or validate the strangeness enhancement scenario as a solution to the ultra-high-energy cosmic-ray muon puzzle.
This paper proposes a modularized, fully differentiable deep learning architecture that generates physically consistent radio pulse signals from in-ice neutrino interactions, enabling gradient-based optimization of the future IceCube-Gen2 detector design.
This paper presents a comprehensive model for X-ray transmission through photoionized gas with moderate Thomson optical depth, deriving analytical criteria to distinguish between neutral, transparent, and complex absorption regimes across a wide range of column densities and metallicities, with specific applications to supernova-circumstellar medium interactions.
This study demonstrates that next-generation pulsar timing arrays, by detecting individual nanohertz gravitational waves from supermassive binary black holes and potentially identifying their electromagnetic counterparts, could constrain the dark energy equation-of-state parameter with a precision of --$0.162$ depending on source hardening timescales and the fraction of detectable counterparts.
This paper introduces an analytical impulse map to model the gravitational dynamics of quasi-hierarchical triple systems with highly eccentric outer orbits, revealing that their inner eccentricity undergoes a random-walk evolution distinct from standard secular mechanisms and significantly altering their gravitational wave coalescence times.
This paper develops a method to test diffusive shock acceleration and diffusion propagation theories using multi-wavelength observations of the Geminga pulsar wind nebula and halo, finding current data consistent with the models but limited by wide energy bins, while anticipating that future high-precision observations will enable rigorous validation of the energy-dependent diffusion coefficient up to sub-PeV energies.
This paper proposes that high-redshift "little blue dots" are infant black holes undergoing super-Eddington accretion within geometrically thick disks, where a collimated "searchlight" radiation field and equatorial shadowing naturally explain their observed faint high-ionization lines, strong Balmer emission, and rapid growth potential.
This paper demonstrates that the hidden symmetry and separability characteristic of Kerr geometry are inevitable local consequences of the Einstein equations for rotating spacetimes, emerging from a rigid projective alignment enforced by mixed field equations under a minimal local equilibrium condition without requiring vacuum, algebraic speciality, or global boundary assumptions.
This study utilizes general relativistic ray-tracing to demonstrate that intensity and polarization images of thick accretion disks around four-dimensional Gauss-Bonnet black holes are significantly influenced by the Gauss-Bonnet coupling parameter and disk inclination, offering distinct observational signatures that can probe the intrinsic spacetime structure and near-horizon accretion dynamics.
This paper models particle acceleration in ultra-fast outflows from active galactic nuclei and demonstrates that next-generation very-high-energy observatories, such as the Cherenkov Telescope Array, could detect their gamma-ray signatures even if they remain invisible to current instruments like Fermi-LAT.