1092 papers
This paper proposes and validates a quantized, fine-tuned multimodal large language model for real-time in-orbit gamma-ray burst identification and spectral index estimation on the CXPD CubeSat, achieving perfect classification accuracy and low regression error despite the computational constraints of onboard processing.
Using advanced density functional theory and kinetic Monte Carlo simulations, this study reveals that volatile molecules exhibit fundamentally different adsorption behaviors on carbonaceous versus silicate dust grains in protoplanetary disks, with weak physisorption on carbon leading to distinct condensation radii and potential carbon depletion, while strong chemisorption on silicates maintains molecular coatings across most disk regions.
This study analyzes multiwavelength variability and spectral energy distributions of BL Lacertae from 2020 to 2024, revealing intraday spectral hysteresis, a significant 370-day radio lag indicating spatially distinct emission regions, and a spectral evolution from intermediate to low synchrotron-peaked states.
This paper proposes a new definition of Horndeski theory based on closure under invertible pure disformal transformations and the inclusion of minimal Horndeski theory, which successfully recovers the standard single-field action and provides a practical framework for constructing multi-field extensions that encompass known antisymmetric structures.
This paper experimentally demonstrates a novel on-axis laser ranging interferometer architecture for future gravity missions, achieving nanometer-accuracy inter-spacecraft measurements with high pointing stability and minimal polarization-induced noise through active beam steering and tilt-to-length coupling mitigation.
This paper presents a new wideband pulsar timing method that rigorously accounts for measurement noise, demonstrating through observations of PSR J21243358 that it yields more realistic uncertainty estimates than existing techniques.
This study reveals that the nuclear star cluster in the massive, star-forming spiral galaxy M 74 is an ancient, metal-poor fossil that has evolved passively for approximately 8 billion years without further growth, contrasting sharply with the younger, metal-rich stellar populations of its surrounding host galaxy.
This paper presents a new catalog of 4,110 galaxy-galaxy gravitational lens candidates, including 3,887 new discoveries, identified by detecting background [O II] emission lines in DESI spectra of foreground luminous red galaxies, which will serve as a valuable dataset for measuring dark matter substructure and enabling time-delay cosmography.
This paper presents the identification and redshift determination of approximately 3,500 bright quasars from the Euclid Quick Data Release using slitless NISP spectroscopy, resulting in a new homogeneous catalogue, the first Euclid quasar composite spectrum, and an analysis of host galaxy morphologies and AGN selection techniques.
The paper introduces CUBE2, an open-source, memory-efficient, and scalable cosmological -body simulation code that combines a multi-level Particle-Mesh method with optimized Green's functions and Information Optimized Storage to achieve high precision and performance, validated by successfully running $6144^3$ particle simulations on the ACECS supercomputer.
This paper critiques the CDM model proposed by A. Lapi et al., arguing that their claim that standard cold dark matter fluctuations alone can drive cosmic acceleration is implausible and highlighting broader issues with cosmological back-reaction frameworks.
This study presents new VLBA astrometry for 11 radio stars, achieving high-precision positions, parallaxes, and proper motions that significantly improve the alignment between the radio-based ICRF and the optical Gaia-CRF at the bright end.
The AIDA-TNG project utilizes cosmological simulations to demonstrate that alternative dark matter models, specifically warm and self-interacting variants, significantly alter halo abundance, radial distribution, and clustering properties, with small-scale clustering emerging as a key discriminator for future observational comparisons.
This paper introduces an automated density-based clustering method to quantify sunspot group nesting across 151 years of observations, revealing that approximately 60% of groups emerge in spatial-temporal nests, with nesting frequency and inter-nest spacing strongly correlated to solar activity levels.
This study reports the rare detection of a massive, high-redshift neutral hydrogen outflow driven by jet-gas interaction 47 kpc beyond the host galaxy of the radio galaxy 0731+438, providing new insights into the synergistic feedback mechanisms between AGN jets and radiation at cosmic noon.
This paper demonstrates that the POLAR-2 mission's High-energy Polarimetry Detector (HPD) will achieve unprecedented time- and energy-resolved linear polarization measurements of prompt gamma-ray bursts, enabling the distinction between competing emission mechanisms and the precise characterization of outflow properties through a novel maximum likelihood fitting technique applied to synthetic sources.
This paper presents a study of cosmic ray composition in the 2–12.5 EeV energy range using muon correlation data from the Yakutsk EAS array (1974–2018), confirming the existence of four distinct groups of primary particles with different origins.
This study analyzes resolved H maps of 685 galaxies around the Virgo cluster to characterize star-forming clumps, revealing that clump counts follow a fractal power-law relation with distance and finding that filament galaxies exhibit a slightly higher number of peripheral clumps compared to non-filament galaxies, though no conclusive differences in clump size distributions were detected.
This study utilizes the COSMOS2020 dataset to demonstrate that the fractal dimension of the cosmic web varies systematically with galaxy color and redshift, revealing a distinct hierarchy where blue galaxies exhibit the highest dimensionality and green galaxies the lowest, thereby establishing fractal dimension as a sensitive diagnostic for mapping large-scale structure evolution.
This study utilizes multi-wavelength data from JWST, ALMA, and Gemini to reveal that the intermediate-mass black hole in the dwarf Seyfert galaxy NGC 4395 drives a stratified, biconical outflow where cold molecular gas dominates the mass loss and kinetic impact on the ISM, while higher ionisation gas is accelerated more efficiently closer to the AGN.