280 papers
This study utilizes two-dimensional radiation-hydrodynamic simulations to demonstrate that relativistic precession of tidal disruption event streams significantly delays light curve peaks by up to 100 days in systems involving massive black holes () viewed at high inclination, while having minimal impact on lower-mass or face-on configurations.
Using general relativistic magnetohydrodynamic simulations with a passive tracer to isolate physical baryon density, this study reveals that baryon loading in magnetically arrested black hole jets is an episodic process driven by magnetic flux eruptions and shear-driven waves, leading to charge-starved, baryon-poor plasma in spinning systems with implications for particle acceleration and non-thermal emission.
This paper investigates how the neutron star equation of state and magnetar mass influence the ejecta properties and light curves of "novae breves"—short-lived optical transients from magnetar giant flares—demonstrating that these features are detectable with current and future facilities, thereby offering a promising method to probe neutron star crusts.
This paper provides a comprehensive analytical study of gravitational-wave signal localization by pulsar timing arrays, deriving expressions for sky localization precision that reveal how the interplay between pulsar-source angular proximity and distance measurement accuracy determines whether improvements stem from tighter distance constraints or the strategic addition of nearby pulsars.
This paper reports on XMM-Newton observations of the supergiant X-ray binary 4U 1909+07, revealing a continued long-term spin-up trend and a unique pulse dropout event accompanied by spectral softening, which is interpreted as evidence of the propeller effect caused by a low-density wind cavity.
This paper investigates the phenomenology of axion dark matter within the kinetic misalignment framework induced by generic PQ-breaking operators, analyzing their impact on relic density, cosmological constraints, and gravitational wave signals while identifying viable parameter spaces consistent with current experimental limits.
This paper establishes theoretical mass limits for compact objects in deformed Hořava-Lifshitz gravity, demonstrating that both the uniform density and causal sound speed bounds converge at the extremal black hole horizon () within the Kehagias-Sfetsos vacuum solution.
This paper extends the macroscopic effective-surface model of neutron stars to rotating systems by deriving analytical expressions for angular momentum and adiabatic moments of inertia within General Relativity, revealing that strong gravity and surface correlations significantly constrain the accessible neutron star radii.
This paper proposes that X-ray plateaus in gamma-ray burst afterglows arise naturally from the hydrodynamics of stratified ultra-relativistic outflows, where a continuous distribution of Lorentz factors drives a long-lived reverse shock and a shallow forward shock decay without requiring late-time energy injection.
This paper proposes a new physical model explaining the formation of active galactic nuclei dusty tori as collections of cold gas clumps vertically supported by radiation forces against gravity, a mechanism that naturally accounts for the absence of such tori in low-luminosity AGNs where accretion rates and disk luminosities fall below critical thresholds.
This paper analytically derives and models the maximum offset of binary neutron star mergers from their host galaxies, finding it scales inversely with the seventh power of the host's escape velocity to aid in identifying hosts for non-coincident merger events.
Observations of the supernova remnant IC 443 by the Large High Altitude Air Shower Observatory (LHAASO) reveal high-energy gamma-ray emission extending beyond 30 TeV without a cutoff, providing compelling evidence that supernova remnant shocks can efficiently accelerate cosmic rays to sub-PeV energies.
This paper presents an analytical framework for early supernova emission from shock interaction with extended material, demonstrating that current optical observations suffer from significant parameter degeneracies—particularly in inferring the material's radius—while highlighting the critical role of future UV and X-ray missions like ULTRASAT in resolving these uncertainties.
This study utilizes 3D soft-sphere coagulation simulations to demonstrate that higher temperatures and polydisperse monomer size distributions lead to denser, more compact dust aggregates, while also evaluating the reliability of eight structural metrics and identifying the average number of contact points as the least effective measure.
This paper presents comprehensive GRMHD simulations with angle-discretized radiation transport showing that super-Eddington accretion onto stellar-mass black holes consistently forms radiation-pressure-supported thick disks with low efficiency due to outflows, where the presence of strong jets driven by high spin and magnetic flux can clear the funnel to enable beamed radiation escape, while weak jets result in obscured flows with distinct observational signatures applicable to ultraluminous X-ray sources and other transient systems.
This study employs Bayesian inference within a density-dependent relativistic mean-field framework, constrained by multi-messenger data ranging from chiral effective field theory to massive pulsar observations, to reconstruct a thermodynamically consistent neutron-star equation of state that predicts a compact canonical radius of approximately 11.6 km and reveals strongly interacting matter cores with sound speeds exceeding the conformal limit.
This paper introduces "Black Hole Vision," an open-source iOS application that utilizes Schwarzschild and Kerr black hole lensing equations to synthesize real-time, gravitationally lensed views of a user's surroundings, thereby visualizing the horizon-scale features expected from the proposed Black Hole Explorer (BHEX) mission.
This paper introduces a novel search framework for precessing binary black hole systems in LIGO-Virgo-KAGRA data that utilizes mode-by-mode filtering, machine learning-based template reduction, and marginalization over harmonic signal-to-noise ratios to overcome the computational and statistical challenges of spin precession, ultimately increasing the sensitive search volume by approximately 10%.
This paper introduces the first application of the Uniform Manifold Approximation and Projection (UMAP) algorithm to the GWTC-3 binary black hole catalog, demonstrating that this model-independent, non-parametric technique effectively identifies distinct astrophysical subpopulations and formation pathways based on mass and spin characteristics.
Using the Green Bank and Parkes radio telescopes, researchers discovered and characterized the first millisecond pulsar, PSR J17162808A, in the globular cluster NGC 6316, confirming its cluster membership through timing analysis despite a lower-than-expected dispersion measure and suggesting that deeper searches could reveal many more pulsars consistent with the cluster's gamma-ray emission.