960 papers
This study utilizes SPH simulations to demonstrate that while no initial alignment exists between sink angular momentum and host filaments, gravity-driven longitudinal flows eventually develop to reorient angular momentum vectors into a predominantly perpendicular configuration, potentially explaining observed outflow-filament alignments within typical outflow lifetimes.
High-resolution multi-wavelength ALMA observations of the HD 34282 protoplanetary disk reveal a bright azimuthal arc with properties consistent with dust trapping in a vortex, including a lower spectral index, wavelength-dependent width, and specific peak offsets at shorter wavelengths.
This paper employs 1D supernova remnant simulations to demonstrate that the secular decrease in dispersion measure observed in repeating fast radio bursts is primarily driven by the expansion of unshocked ejecta from young magnetars, while shock-amplified magnetic fields account for rotation measure variations, thereby supporting a young core-collapse supernova origin for these sources and highlighting the necessity of modeling local environments for accurate cosmological inferences.
The paper reports that comet 3I/ATLAS, originating from another planetary system, exhibits a deuterium-to-hydrogen ratio in its water exceeding Earth's ocean values by over 40 times and typical Solar System cometary values by over 30 times, indicating its water formed under significantly colder and less irradiated conditions than those found in our own solar system.
This paper presents the first NuSTAR hard X-ray observations of the low-luminosity active galactic nucleus NGC 4278, interpreting its variable spectrum through a radiatively inefficient accretion flow model to explain the origin of its emission and constrain the production sites of associated TeV gamma rays and potential neutrinos.
This paper presents a new three-parameter calibration of the broad-line region size-luminosity-velocity relation that incorporates the Eddington ratio to correct systematic biases in high-Eddington AGNs, leading to revised single-epoch black hole mass estimators that significantly alter previous cosmic mass density and early-universe seed growth calculations.
This paper utilizes an anisotropic diffusion model to interpret the asymmetric morphologies of the Geminga and Monogem pulsar halos observed by HAWC, revealing distinct magnetic field orientations and a local coherence length of approximately 100 pc, thereby establishing halo morphology as a powerful diagnostic tool for interstellar magnetic turbulence.
This paper proposes that the unique characteristics of supernovae like SN 2021yfj, which interact with dense silicon- and sulfur-rich circumstellar matter, can be explained by the merger of two white dwarfs where a hybrid white dwarf's outer layers are tidally stripped to form the surrounding shell.
This paper proposes a low-energy, low-thrust trajectory design for a mission touring Saturn's inner large moons (Rhea, Dione, Tethys, Enceladus, and Mimas) that utilizes J2-perturbed three-body dynamics and invariant manifolds to achieve full surface coverage while minimizing fuel consumption and maximizing observation time compared to traditional flyby missions.
This paper reports a novel correlated trend between the long-term flux variations of persistent radio sources and the burst energetics of specific fast radio bursts (FRB 20190520B and FRB 20240114A), providing evidence that both phenomena may be powered by a shared energy reservoir, such as a magnetar.
This review explores how space-based gravitational wave detectors like LISA can probe the nature of dark matter by analyzing its effects on compact-object dynamics, gravitational lensing, and direct field couplings.
This paper presents multi-epoch VLBI and spectral monitoring of the supermassive black hole binary candidate SDSS J143016.05+230344.4, revealing a delayed radio flare that traces kinetic energy injection from a compact synchrotron component interacting with a structured circumnuclear medium.
This paper demonstrates that a discrete polarimetric tomography method, when applied to synthetic multi-spacecraft white-light images, effectively reconstructs the 3D density structure and front location of coronal mass ejections with higher accuracy using polarimetric data and at least four observing spacecraft compared to non-polarimetric approaches.
By modeling eight Milky Way dwarf spheroidal galaxies with solitonic cores and NFW envelopes while accounting for core-halo diversity, this study identifies two distinct fuzzy dark matter particle mass ranges consistent with observed kinematics, though the resulting constraints challenge the theory by conflicting with satellite abundance counts and Lyman- forest limits.
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 reports the first isotopic ratio measurements for an interstellar comet, 3I/ATLAS, revealing elevated nitrogen and carbon ratios that suggest the object originated in the outer disc of an older, low-metallicity star.
This study utilizes data-driven magnetofrictional simulations to demonstrate that the November 28, 2023, eruption from solar active region 13500 was triggered by the progressive injection of magnetic helicity and energy, which formed a twisted flux rope that became torus-unstable when the ratio of current-carrying to total relative helicity reached a critical threshold of 0.30.
This study demonstrates that convolutional neural networks can accurately predict star cluster ages from broadband imaging by identifying physically meaningful, age-dependent environmental cues in the surrounding interstellar medium, particularly for young clusters where traditional color-based methods face limitations.
This paper proposes that the rapid "flip-flop" spectral transitions observed in X-ray binaries and the changing-state phenomena in active galactic nuclei are scale-invariant manifestations of the same underlying accretion physics, occurring at a few percent of the Eddington luminosity with transition timescales that scale linearly with mass.
This paper proposes a new, more efficient broadband SETI strategy that leverages existing non-SETI astronomical survey data to constrain the prevalence of nearby communicative civilizations and alien probes, arguing that the lack of detected signals or probes suggests no such civilization has been within 100 light-years of Earth in the past few billion years.