411 papers
Using high-resolution XRISM/Resolve spectroscopy, this study reveals that while the hot X-ray gas in M87's AGN-associated arms shows limited dynamical impact, the cooler uplifted gas exhibits significant velocity gradients and dispersions, supporting the uplift scenario and suggesting that AGN-driven motions in the hot ICM are short-lived.
Using ALMA and VLT/MUSE observations, researchers characterize a massive, multi-phase outflow in the local merger IRAS20100-4156 driven by starburst activity that contains 40% of the system's molecular gas and shows no signs of deceleration over kiloparsec scales, suggesting ongoing acceleration mechanisms.
This study presents the discovery and spectroscopic confirmation of three high-redshift (–$5.6$) radio-selected star-forming galaxies using MIGHTEE and JWST COSMOS-3D data, demonstrating that their dust-independent radio emission traces intense star formation rates consistent with the main sequence and potentially triggered by mergers, thereby opening a new window for studying early Universe star formation without dust bias.
This study utilizes convolutional neural networks and ensemble learning on deep HSC-SSP images to identify significantly more Galactic cirrus filaments than previous surveys, revealing that sky background over-subtraction in coadd images dims faint objects near these structures and necessitating their inclusion in background estimation algorithms.
This paper presents a new, computationally efficient subgrid framework implemented in the {\sc arepo} code that successfully models Population III feedback and metal enrichment in early universe simulations, demonstrating convergence in star formation rates and metal distribution at high redshifts.
ALMA Band 9 observations of the MC 27/L1521F protostar reveal a previously undetected warm, dense, off-centered ring structure traced by high-excitation CO(6-5) emission, providing new insights into shock-heating and gas-magnetic field interactions during the earliest stages of star formation.
This paper presents multi-wavelength radio observations of interstellar comet 3I/ATLAS that reveal a high CO/H₂O ratio and demonstrate that sublimation from an extended source within the coma accounts for up to 80% of the observed water production during its pre-perihelion phase.
Using dispersion measures from 171 Fast Radio Bursts intersecting the Andromeda galaxy's halo compared to a control sample, this study constrains the mass of M31's ionized circumgalactic medium to approximately $1.86 \times 10^{11} M_\odot$, demonstrating the efficacy of FRBs as a tool for probing the baryon content of galactic halos.
Based on a 45-year radial velocity survey of 625 stars in the Hyades cluster, this study characterizes the binary population by determining a 40% binary frequency, updating orbital parameters for over 100 systems, revising the tidal circularization period to approximately 5.9 days, and measuring the cluster's velocity dispersion and stellar gravitational/convective shifts.
This paper reports the discovery of LCEz4-M1, the highest-redshift Lyman continuum emitter candidate to date at , which exhibits a high escape fraction of ionizing photons likely driven by its compact starburst nature and potential minor interactions within an overdense environment.
This paper presents new long-slit stellar kinematics and triaxial Schwarzschild modeling for a sample of 21 Brightest Cluster Galaxies, revealing the presence of eight ultramassive black holes, diverse dark matter halo geometries, and specific kinematic features such as low central velocity dispersions and a kinematically decoupled core.
This paper presents an automated pre-selection method that more than doubles the known sample of Counter-Rotating Disk galaxies in MaNGA DR17 to 126 confirmed cases, while revealing that their emission-line diagnostics do not differ significantly from early-type galaxies, thereby enabling more robust statistical studies of their formation and evolution.
This paper systematically investigates how Navarro-Frenk-White and Beta dark matter halo profiles influence the orbital dynamics and gravitational wave signatures of extreme mass ratio inspirals by modeling dynamical friction, accretion, and radiation reaction, revealing distinct long-term phase shifts and a unique energy flux cusp in the NFW model that could be detectable by future space-based observatories.
This paper introduces and validates "Nemesis," a flexible and scalable multi-scale, multi-physics algorithm built on AMUSE that accurately simulates complex astrophysical systems like star clusters with planetary binaries, matching the precision of direct N-body codes while maintaining computational efficiency through effective time synchronization and parallelization.
The Event Horizon Telescope collaboration successfully imaged the supermassive black hole at the center of galaxy M87, revealing a bright asymmetric ring surrounding a dark shadow consistent with general relativity predictions and enabling a precise mass measurement of approximately 6.5 billion solar masses.