1406 papers
This study quantifies how stochastic star-formation histories and dust influence the photometric selection and physical characterization of quiescent galaxy candidates using JWST/MIRI data, challenging the assumption that these galaxies are uniformly dust-free.
The paper introduces STRAWBERRY, a novel algorithm that identifies dark matter haloes by distinguishing bound and unbound particles through an accelerated reference frame's gravitational potential, revealing that haloes function as two-component systems comprising a stable, virialized core and a rapidly evolving unbound component.
This paper introduces a novel time-series calibration method for global 21-cm cosmology experiments that utilizes noise wave parameters to model and correct for system drift and reference source impedance assumptions, thereby significantly reducing spectral residuals and parameter fit errors compared to previous techniques.
This paper resolves the discrepancy between Kazantsev theory and numerical simulations regarding small-scale dynamo decay at small Prandtl numbers by demonstrating that the observed exponential decay is a temporary effect caused by large-scale velocity correlator flattening, which corresponds to a long-living virtual level in the associated Schrödinger-type equation.
This study identifies two RQG-like massive quiescent galaxies in the FLARES simulations, revealing that AGN-driven feedback drives their rapid quenching and super-solar metallicity while suggesting that systematic errors and enhanced AGN accretion rates are needed to reconcile observed and predicted number densities.
This paper presents a new selection method using eROSITA X-ray data and optical catalogs to identify period-bounce cataclysmic variables, successfully confirming six new systems (including one previously unknown) with TESS and SDSS follow-up, thereby increasing the known population of these rare objects by 18% to 39.
This study utilizes Self-Organizing Maps on VISTA near- and mid-infrared images of approximately 10,000 Young Stellar Objects in the Orion complex to create a non-theoretical, data-driven grid of morphological prototypes and probabilistic maps linking these morphologies to evolutionary stages, thereby establishing a foundation for a novel spectro-morphological classification scheme.
This paper presents an analytical model demonstrating that the time evolution of polarization signals in Type II supernovae with confined circumstellar material can be used to constrain the disk's geometric and physical parameters, successfully applying this framework to explain the observations of SN 2023ixf and thereby offering insights into the mass-loss mechanisms of massive stars.
This paper presents and validates a non-explosive pre-supernova (NEPS) feedback module within the COLIBRE galaxy formation model, demonstrating that incorporating momentum injection and photoheating from young massive stars effectively regulates star formation, improves numerical convergence, and synergistically enhances the efficacy of subsequent supernova feedback.
Analysis of deep JWST spectra of the luminous Little Red Dot FRESCO-GN-9771 reveals that its distinctive spectral features, including strong Balmer breaks, collisional Balmer lines with scattering wings, and optical [Fe II] emission, originate from a dense, warm, outflowing gas layer that obscures the central black hole and suggests its mass is significantly lower than virial estimates indicate.
This paper presents the discovery of 289 high-redshift () Lyman-break galaxies using UltraVISTA and Euclid imaging in the COSMOS field, which are used to constrain the rest-frame UV luminosity function and demonstrate the synergistic potential of combining these datasets for identifying extreme sources in the Epoch of Reionization.
This paper reports the discovery of a supermassive black hole in the Coma cluster, J1257, which exhibits a rare 20-year history of repeating, short-timescale X-ray variability and distinct spectral states, suggesting it is a low-mass active galactic nucleus potentially displaying quasi-periodic oscillations or eruptions.
Using the IllustrisTNG cosmological simulations, this study reveals that counterrotating stellar disks are rare but diverse structures in Milky Way-mass galaxies, primarily formed through the accretion of misaligned gas that triggers bursty in-situ star formation, thereby serving as valuable tracers of a galaxy's accretion history.
This paper introduces a flexible, parallel framework called Arepo-GW that integrates binary population synthesis with hydrodynamic simulations to generate gravitational wave event catalogs, demonstrating its application on the MillenniumTNG suite to reveal merger rates and progenitor properties consistent with current observations while highlighting specific discrepancies in binary black hole merger rates and redshift evolution.
By analyzing a comprehensive dataset of 391 transit light curves, this study confirms the rapid orbital decay of the hot Jupiter WASP-12 b with a decay rate of , supporting this mechanism as the primary cause of its observed timing deviations while also deriving a planetary Love number consistent with Jupiter's internal structure.
This study demonstrates that cross-correlating CONCERTO-like millimeter-wave line-intensity mapping data with galaxy redshift surveys can accurately recover the cosmic CO excitation ladder and molecular gas density up to , although the specific CONCERTO experiment lacks the sensitivity to detect the required cross-power spectra.
This study demonstrates that optically thick winds in very massive stars significantly enhance mass loss, thereby suppressing the formation of intermediate-mass black holes via direct collapse at metallicities above , a threshold one order of magnitude lower than previously predicted.
The paper argues that cool supergiants at extremely low metallicity are limited by a constant upper luminosity due to a metallicity-independent late-phase mass loss mechanism that strips hydrogen layers, allowing massive stars to evolve into hot, helium-rich objects capable of producing hard ionizing radiation and contributing to early Universe nitrogen enrichment.
By combining new and existing XRISM/Resolve observations to map the Perseus galaxy cluster out to ~0.7, this study reveals high velocity dispersions and a dipole-like bulk flow indicative of merger-driven turbulence and rotation, constraining the viewing angle and suggesting that turbulent cascade plays a significant role in converting merger energy within the intracluster medium.
Using high-resolution spectropolarimetric observations and advanced modeling, this study reveals that a C5.1 solar flare and filament eruption in NOAA 12561 was triggered by low-altitude magnetic reconnection in a sheared, high-energy precursor region, leading to significant atmospheric heating, downflows, and a 30% reduction in free energy as post-flare loops formed.