930 papers
This paper utilizes 2D3V PIC simulations to demonstrate that in freely decaying sub-ion turbulence, intermittent regions with non-zero drive helicity reduction, motivating a new history-dependent helicity density that reveals time-invariant intermediate-scale plateaus consistent with kinetic decay constraints.
This paper introduces a multitask surrogate model for neutron star equations of state that achieves near-perfect physical validity classification and high-precision regression of key stellar properties while providing distribution-free, certified uncertainty estimates through the novel application of Mondrian conformal prediction.
This paper demonstrates how introductory physics students can use thermodynamic principles, specifically the analogy between black hole area and entropy, to derive bounds on energy emitted during black hole mergers and understand how these concepts are applied in modern gravitational wave research.
This study identifies Compton-thick active galactic nuclei within a sample of 1,104 mid-infrared-selected, X-ray-undetected AGNs in the COSMOS field by combining MIR diagnostics and X-ray stacking analysis, confirming 23 candidates but finding that they constitute only 2.1% of the sample, suggesting that a significant population of Compton-thick AGNs remains undetected by current selection methods.
This paper enhances the reliability of solar flare regression by applying conformal prediction to deep learning models, demonstrating that conformalized quantile regression outperforms alternative methods in achieving valid coverage rates and favorable interval lengths for space weather forecasting.
This paper introduces the CEREAL sample, a Planck-selected ensemble of 169 low-redshift galaxy clusters with uniform Chandra X-ray follow-up, which reveals a significantly higher fraction of non-cool core systems compared to traditional X-ray-selected samples and establishes a well-understood baseline for evolutionary studies of distant clusters.
This study utilizes direct N-body simulations to demonstrate that the binary population within low-mass globular cluster streams is dynamically shaped by initial cluster density and massive star fractions, resulting in the disruption of wide binaries and the central concentration of close binaries, which collectively add a small but measurable velocity dispersion to the streams.
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.