881 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 paper presents the description and characterization of the FoReRo2 instrument's polarimetric and spectropolarimetric capabilities at the Rozhen Observatory, including a statistical analysis of Serkowski's law parameters, an evaluation of standard star stability, and demonstration of its performance through observations of RS Oph, comet C/2019 Y4, and the symbiotic star Z And.
By analyzing Gaia astrometry in 98 transition disks, this study finds that while companions are detected in 32% of the sample, most are stellar-mass objects that cannot explain the inner dust cavities, suggesting that if companions are responsible for cavity formation, they are likely planetary-mass bodies residing at wider separations.
This paper challenges the conventional view that Pluto-Charon's mutual synchronization resulted from tidal recession, instead proposing a capture scenario where Charon formed at a higher altitude and migrated inward, a process that explains the system's lack of tidal fractures and potential spin reversal while demonstrating that tidal dissipation was significantly lower than in recession models.
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 paper extends the testing of the cosmological Euler equation by introducing a generalized observable for equivalence principle violations and a model-independent parameter for dark matter viscosity, demonstrating that future Stage-IV surveys like SKA2 can constrain the latter to a precision of approximately $10^{-7}$.
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 demonstrates a high correlation (92%) and strong linear agreement (slope of 0.96) between line-of-sight velocity measurements from the SO/PHI-HRT instrument on Solar Orbiter and the SDO/HMI instrument, confirming their consistency for future multi-vantage point solar observations.
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.
This paper presents the first dedicated survey of atmospheric escape from gas giants orbiting F stars using Palomar/WIRC observations, revealing strong and tentative helium detections in several systems and demonstrating that their mass-loss rates are best explained by a combination of Roche filling factor and XUV luminosity rather than NUV-driven models.
This paper investigates whether observed local cosmic expansion anisotropies can be explained by an off-center observer in the Lemaître-Tolman-Bondi framework by comparing exact relativistic luminosity distances with covariant cosmographic approximations and linear perturbation theory to establish a consistent dictionary for interpreting large-scale gravitational field anisotropies beyond the standard FLRW model.
Using Cosmicflows-4 and Pantheon+ data, this study measures a few-percent anisotropic expansion rate fluctuation in the local Universe dominated by a dipole that decreases with redshift, interprets these multipoles within covariant cosmography as driven by specific higher-order parameters, and demonstrates that this model-independent framework can accurately reconstruct luminosity distances up to without assuming peculiar velocities.
This paper presents a clustering analysis of high-redshift galaxies selected via medium-band photometry using IBIS and DESI data, revealing that the samples consist of overlapping Ly emitters and Lyman break galaxies with correlation lengths of $3-4\,h^{-1}1.8-2.5$, thereby validating their utility for future large-scale structure cosmological surveys.
Using SRG/eROSITA data from 680 galaxy clusters, this study detects shock-heated gas extending to 4.5 Mpc, identifies the virial radius as the transition point where cosmic filaments connect to clusters, and finds that observed gas distribution at large radii is more efficient than predicted by IllustrisTNG simulations.