1088 papers
This paper introduces a differentiable and optimizable 3D geometrical model that successfully reproduces observed molecular spectral cubes of the prestellar core L1544, revealing that an asymmetric density and velocity structure is required to explain the velocity differences between p-NH2D and N2D+.
By introducing new parametric mass functions with sharper features for binary black holes, this study demonstrates that analyzing the GWTC-4.0 catalog via spectral-sirens inference improves Hubble constant constraints by approximately 50% compared to previous power-law-only models, achieving precision comparable to joint analyses that include neutron stars and galaxy catalogs.
This study demonstrates that while extended dark energy models remain consistent with CDM at the background level, their distinct expansion histories and matter densities induce significant, coherent non-linear signatures in structure formation—such as enhanced small-scale power and altered halo formation epochs—that can be effectively constrained by large-scale structure observables.
Using CMB polarization data from the BICEP/Keck BK18 dataset, this study presents the first constraints on multipole-dependent cosmic birefringence within an Early Dark Energy scenario, finding no evidence for a step-function rotation and deriving an axion-photon coupling amplitude of consistent with previous limits.
Using deep-learning analysis of 43,922 galaxies from the 4MOST CHANCES survey, this study reveals that galaxy mergers are significantly more likely to occur near cosmic web filaments than in other regions, suggesting that these filaments facilitate pre-processing interactions that transform galaxies before they enter cluster cores.
By extending a hierarchical Bayesian framework to incorporate pulsar observations and explicitly modeling density uncertainties, this study refines the two-part power-law relationship between magnetic field strength and gas density in the interstellar medium, confirming a non-zero exponent for diffuse gas and providing precise constraints on the transition density and field strength parameters.
This study presents the results of a three-year IUE monitoring campaign of the Seyfert 1 galaxy ESO 141-G55, revealing significant UV continuum and line variability with measured time lags for Si IV, C IV, and He II that suggest an outer accretion disc as the origin of these emission lines.
By analyzing CosmicFlows4 data within a 350 Mpc volume, this study identifies distinct scaling regimes and strong intermittency in the local universe's velocity and density fields, revealing non-Gaussian, cascade-like characteristics and a transition toward large-scale homogeneity.
This paper presents a high-resolution spectroscopic analysis of XRISM and NuSTAR observations of the black hole X-ray binary GS 1354--64, revealing a clean broad iron line that indicates a rapidly spinning black hole (a > 0.98) and demonstrates the power of X-ray microcalorimeters for constraining black hole parameters.
This paper evaluates the completeness of the QUBRICS survey by analyzing 3,501 QSO redshifts from Gaia DR3 spectra, confirming the high efficiency of its selection methods (89% recall) and providing a spectroscopic completeness estimate of 82% alongside reliable redshifts for 1,223 new quasars to support future cosmological studies.
This paper presents isotopic measurements of the interstellar object 3I/ATLAS, revealing extreme deuterium and carbon ratios that indicate it formed over 10 billion years ago in a cold, metal-poor environment within the early Milky Way, making it a unique preserved fragment of an ancient planetary system unlike any known Solar System body.
Using new IRAM 30m CO(2-1) observations, this study reveals that the nearby edge-on spiral galaxy NGC 891 hosts a significant extraplanar molecular gas component extending up to 1.4 kpc above the disk midplane, which accounts for up to 27% of the galaxy's total molecular mass and is likely driven by star formation feedback within a galactic fountain scenario.
Using high-time-resolution observations from FAST, this study reveals that interplanetary scintillation affects different polarization components of the quasar 3C 286 with varying time delays, indicating that its polarized emissions originate from distinct regions (the core and southwestern jet) and enabling the derivation of a solar wind plasma speed of approximately 637 km/s.
This study utilizes SPH simulations to demonstrate that while no initial alignment exists between sink angular momentum and host filaments, gravity-driven longitudinal flows eventually develop to reorient angular momentum vectors into a predominantly perpendicular configuration, potentially explaining observed outflow-filament alignments within typical outflow lifetimes.
High-resolution multi-wavelength ALMA observations of the HD 34282 protoplanetary disk reveal a bright azimuthal arc with properties consistent with dust trapping in a vortex, including a lower spectral index, wavelength-dependent width, and specific peak offsets at shorter wavelengths.
This paper employs 1D supernova remnant simulations to demonstrate that the secular decrease in dispersion measure observed in repeating fast radio bursts is primarily driven by the expansion of unshocked ejecta from young magnetars, while shock-amplified magnetic fields account for rotation measure variations, thereby supporting a young core-collapse supernova origin for these sources and highlighting the necessity of modeling local environments for accurate cosmological inferences.
The paper reports that comet 3I/ATLAS, originating from another planetary system, exhibits a deuterium-to-hydrogen ratio in its water exceeding Earth's ocean values by over 40 times and typical Solar System cometary values by over 30 times, indicating its water formed under significantly colder and less irradiated conditions than those found in our own solar system.
This paper presents the first NuSTAR hard X-ray observations of the low-luminosity active galactic nucleus NGC 4278, interpreting its variable spectrum through a radiatively inefficient accretion flow model to explain the origin of its emission and constrain the production sites of associated TeV gamma rays and potential neutrinos.
This paper presents a new three-parameter calibration of the broad-line region size-luminosity-velocity relation that incorporates the Eddington ratio to correct systematic biases in high-Eddington AGNs, leading to revised single-epoch black hole mass estimators that significantly alter previous cosmic mass density and early-universe seed growth calculations.
This paper utilizes an anisotropic diffusion model to interpret the asymmetric morphologies of the Geminga and Monogem pulsar halos observed by HAWC, revealing distinct magnetic field orientations and a local coherence length of approximately 100 pc, thereby establishing halo morphology as a powerful diagnostic tool for interstellar magnetic turbulence.