317 papers
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.
By analyzing the CROCODILE hydrodynamic simulation using count-in-cells and nearest-neighbor distribution methods, this study demonstrates that the extreme quasar overdensity known as the Cosmic Himalayas is a natural outcome of the Lambda CDM framework when non-Gaussian statistics are properly applied, thereby resolving the apparent tension caused by conventional Gaussian assumptions.
Using Dark-Matter-only -body simulations from the IllustrisTNG project, this study computes the frame-dragging gravito-magnetic vector potential on galactic scales, finding it to be two orders of magnitude larger than perturbation theory predicts yet remaining a subdominant $0.1\% \sim 1\%\Lambda$CDM model.
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.
This study constrains the Lyman continuum escape fraction () for local galaxy analogues using a Bayesian SED fitting framework and symbolic regression, revealing a median escape fraction of 4% and establishing a new predictive relation between the UV -slope and .
This paper establishes updated nominal RUWE thresholds for upcoming Gaia data releases (DR4 and DR5) based on a full 10-year mission simulation, demonstrating that these stricter limits will significantly increase the detectability of both short-period binaries (down to days) and long-period systems (up to 100 years) by better distinguishing them from well-behaved single stars.
This paper demonstrates that the semi-analytic model Galacticus reliably reproduces the warm dark matter subhalo distributions observed in COZMIC N-body simulations, validating it as a computationally efficient tool for exploring WDM implications across astrophysical phenomena.
This study analyzes mass, energy, and metal flows in the IllustrisTNG100 simulations to demonstrate how the transition from supernova-dominated to kinetic AGN-dominated feedback regulates galaxy growth and quenching by balancing inflows and outflows across different halo masses and redshifts.
By constructing the largest 3D map of inner-Galaxy metal-poor giants to date, this study reveals a centrally concentrated, flattened spheroidal component and a distinct very metal-poor population around [Fe/H]~ -2.7, offering new insights into the Milky Way's early dissipative assembly phases.
This study systematically compares intrinsic alignment signals of disk and elliptical galaxies across three hydrodynamical simulations (TNG300, Horizon-AGN, and EAGLE) at redshifts and , revealing generally positive correlations that are robust to shape definitions but sensitive to sub-grid physics and morphological selection criteria, particularly in the Horizon-AGN simulation.
Using JWST observations of a star-forming filament in the 3 kpc arm backlit by the Galactic Center, this study reveals that 50–88% of carbon monoxide is locked in ice at high column densities, demonstrating that standard CO X-factor mass measurements significantly underestimate gas mass in dense star-forming regions and require systematic corrections.
This study validates an orbit-superposition method for edge-on barred galaxies by demonstrating its ability to accurately decompose simulated galaxies into distinct structural components (bars, bulges, discs, and halos) and recover their mass fractions, mean ages, and metallicity gradients with high precision.
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 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.
Using TNG50 simulations of Milky Way and Andromeda analogs, this study demonstrates that radial migration significantly biases reconstructed star formation histories by creating artificial star formation in outer regions and smoothing out localized bursts, with the magnitude of these distortions critically dependent on bar strength, disk thickness, and merger history.
This study utilizes JWST and ground-based spectroscopy of 651 galaxies in the UDS field to trace Ly evolution from z=4.5 to 11, revealing a significant drop in Ly visibility at z7 that implies a high neutral hydrogen fraction and the presence of small, patchy ionized bubbles, thereby highlighting the inhomogeneous nature of cosmic reionization.
This study characterizes JWST spectra of 61 galaxies at , revealing that emission lines exhibit marked changes at these high redshifts—specifically, a 2–3 times higher prevalence of extreme CIII], H, and H equivalent widths compared to lower-redshift galaxies—suggesting shifts in star formation conditions, harder ionizing sources, and nitrogen enhancements, while also identifying a small population of red UV galaxies likely caused by moderate dust or hot, dense stellar populations.
This paper proposes that ultra-strongly self-interacting dark matter (uSIDM) drives the rapid formation of massive black hole seeds through gravothermal core collapse, providing a natural explanation for the observed abundance, mass, and compactness of high-redshift "Little Red Dots" that standard cold dark matter models struggle to reproduce.
Using deep JWST/NIRSpec spectra from the Blue Jay survey, this study presents the first systematic analysis of neutral gas outflows in massive z ~ 2 galaxies via Ca II H and K absorption lines, establishing a new empirical calibration between Ca II and Na I column densities to estimate neutral outflow masses and rates.
By analyzing a large sample of 500,000 galaxies, this study reveals a fundamental symmetry in structural parameters around the Star-Forming Main Sequence and demonstrates that the observed dispersion in star formation rates arises from oscillating cosmic accretion flows regulated by stellar surface density.