327 papers
This paper demonstrates that multiband measurements of relativistic corrections to the Sunyaev-Zel'dovich effect can successfully detect and constrain the thermodynamics of superheated gas in the major merger MACS J0717.5+3745, yielding temperature estimates consistent with X-ray observations.
Using JWST observations, researchers identified a remarkably evolved protocluster core at containing 23 galaxies with a total stellar mass exceeding $10^{10}\ \rm{M_{\odot}}$, where massive, dusty galaxies in the core are undergoing a synchronized quenching phase distinct from the bursty star formation in the outskirts, marking the most extreme overdensity observed at this early epoch.
The BoRG- survey reveals that analogs of the UV-luminous "blue monster" galaxies at are dust-poor systems experiencing stochastic star formation bursts, suggesting that the extreme brightness of the higher-redshift population is driven by very young stellar populations under 100 Myr old rather than dominant active galactic nuclei.
Using James Webb Space Telescope spectroscopy, researchers identified LAP1-B, an ultra-faint, chemically primitive galaxy at redshift 6.625 with the lowest known metallicity and a dominant dark matter halo, providing direct evidence of an early-stage galaxy progenitor that serves as a high-redshift analog to local ancient dwarf galaxies.
This paper introduces a new method for identifying Local Group analogues in cosmological simulations by incorporating the observed speed and direction of the Local Group's center of mass, revealing that this constraint significantly alters the relative velocity characteristics of simulated galaxy pairs compared to traditional selection methods.
This study uses tailored simulations of Milky Way satellites to demonstrate that while Galactic tides have minimal impact on dark matter density inference, the standard Jeans analysis method tends to underestimate inner densities and J-factors due to model limitations, and the consistency of results with cosmological predictions suggests either a light Milky Way or restricted tidal effects.
Using the zELDA code to analyze 313 Lyman-alpha spectra, this study disentangles galactic and intergalactic effects to reveal that intrinsic galactic line profiles remain remarkably stable from redshift 0 to 6, while the intergalactic medium's transmission efficiency drops significantly at higher redshifts, eventually dominating Lyman-alpha observability beyond .
This paper demonstrates that the previously reported gravitational anomaly in wide binaries, which supported Modified Newtonian Dynamics, is likely an artifact of orbital modeling choices, as a hierarchical Bayesian analysis accounting for three-dimensional orbital elements yields results consistent with standard Newtonian gravity.
This study utilizes LAMOST DR10 spectra cross-matched with Gaia and SDSS data to identify 63 isolated magnetic white dwarfs, including 32 new discoveries, demonstrating the survey's capability to characterize magnetic fields via Zeeman splitting and expand the known population for future follow-up.
This paper presents spectroscopic redshifts for 31 galaxies in the Peanut cluster, revealing a massive system with a velocity dispersion suggesting a total mass of $2 \times 10^{15} M_\odot$ that may represent either a single extremely massive cluster or a rare, nearly head-on merger similar to the Bullet cluster, though the evidence for distinct substructures remains statistically ambiguous.
This study reports the discovery of a young, metal-poor binary open cluster within the high-velocity cloud Complex H, providing direct evidence that the circumgalactic medium can sustain star formation and offering new insights into the dynamics and accretion of gas onto the Milky Way.
Magnetohydrodynamic simulations reveal that while remnant black holes from massive stars can concentrate in the centers of nuclear star clusters, in-situ accretion is generally inefficient at forming heavy seeds due to feedback-driven gas dispersal, unless specific sub-grid models allow for exceptionally high Bondi inflow rates.
This paper evaluates three distinct automated source-finding techniques (DRAGNHunter, coarse-grained complexity, and RG-CAT) on EMU-G09 observations, demonstrating that while each method recovers different subsets of extended radio sources, their combined application is essential for achieving a complete census in future large-scale surveys.
This study employs high-resolution two-fluid simulations and revised linear theory to demonstrate that ambipolar diffusion significantly alters the nonlinear evolution of the Rayleigh-Taylor instability in partially ionized plasmas, introducing coupling-dependent fragmentation and interface reorganization that deviate from classical single-fluid predictions.
This study identifies and characterizes nearly two dozen candidate Luminous Blue Variables in the galaxies M31 and M33, confirming one as a definitive LBV and designating four as high-probability candidates based on multi-epoch spectroscopy, SED fitting, and evolutionary track analysis, thereby significantly expanding the known population of these massive stars in the Local Group.
This study utilizes LAMOST Data Release 11 cross-correlated with multiple optical and infrared surveys to identify 139 white dwarf candidates exhibiting infrared excess, comprising potential companions like M dwarfs and brown dwarfs as well as debris disks, while emphasizing the need for high-resolution follow-up observations to confirm these findings.
China's Tianwen-1 spacecraft made history by capturing the first deep-space images of the interstellar object 3I/ATLAS from Mars, revealing a coma dominated by large dust grains and providing unique constraints on its dust dynamics and potential origin in the outer regions of a parent planetary disk.
This paper investigates how dark dipole radiation from eccentric supermassive black hole binaries can accelerate their inspiral and alter the low-frequency stochastic gravitational-wave background, finding that while it cannot fully resolve the final-parsec problem, it remains detectable through Bayesian analysis of current pulsar timing array data.
This paper investigates how dark matter environments, including minispikes and NFW haloes, modify the nonlinear gravitational memory of intermediate-mass-ratio binaries through effects like dynamical friction and accretion, ultimately demonstrating that these astrophysical surroundings leave a detectable hereditary imprint on gravitational wave signals that could be observed by future space-based detectors.
This paper introduces an enhanced, observation-applicable Bayesian classifier using Gaussian mixture models to reliably categorize galaxy cluster dynamical states into multiple merger stages, demonstrating that utilizing a larger set of indicators and projecting high-dimensional simulation data onto lower-dimensional spaces yields superior classification performance compared to previous methods.