1088 papers
This paper presents an end-to-end deep learning pipeline that extends the AutoSourceID method to Cherenkov Telescope Array Observatory (CTAO) simulated data, offering a versatile framework for the detection, localization, and characterization of gamma-ray sources as a step toward a foundational model for astrophysical source detection.
This paper demonstrates that Tsallis cosmology, when applied within both the Cai-Kim thermodynamic framework and the holographic dark energy scenario, yields pathological behaviors such as negative energy densities and violations of early-universe constraints for any deviation from the standard extensive limit, thereby restricting viable models to the standard CDM cosmology.
This paper examines the ongoing debate surrounding large-scale bulk flows in the universe, highlighting the persistent discrepancies between observed high-velocity coherent motions and the predictions of the standard CDM model, which pose significant challenges for theoretical explanations and may have influenced both structure formation and astronomical observations.
Using a sample of 29 high-time-resolution FRBs from the CRAFT survey, this study models the de-biased intrinsic width and scattering distributions in the host rest-frame, finding that log-uniform distributions better describe the data than previous lognormal assumptions and revealing significant detection biases that impact population and cosmological studies.
Using non-LTE radiative transfer simulations, this study demonstrates that lanthanides significantly influence the infrared spectra of nebular phase kilonovae below 4 μm through dominant line opacity from species like Ce III and Nd II, yet their contribution remains insufficient to explain the smooth blackbody-like continua observed in events such as AT2023vfi, suggesting that near-infrared observations are optimal for probing lanthanides while mid-infrared spectroscopy can effectively isolate non-lanthanide emission.
Chandra and Hubble observations reveal that the short GRB 230906A originated from a compact binary merger within a peculiar, faint galaxy located in the tidal tail of a merging galaxy group at , suggesting the progenitor formed from a merger-induced starburst approximately 700 million years prior.
The ReD experiment utilized a compact dual-phase argon Time Projection Chamber irradiated by neutrons to model-independently measure the ionization yield of argon for nuclear recoils between 2 and 10 keV, revealing higher yields at lower energies than previously observed and extending experimental coverage crucial for detecting low-mass Dark Matter.
The authors introduce the Cosmic-Enu-II emulator, which leverages a fast linear response method and non-linear perturbation theory to significantly improve the accuracy and momentum resolution of modeling massive neutrino clustering across different mass orderings, thereby enabling precise tests of neutrino free-streaming against cosmological bounds.
This paper introduces pkdgrav3, a high-performance, fully parallel tree-SPH code optimized for hybrid CPU/GPU architectures that accurately simulates large-scale, self-gravitating hydrodynamic systems such as planetary impacts.
This paper demonstrates how large language models can automate the analysis of NASA's General Coordinates Network (GCN) Circulars by employing neural topic modeling for clustering, contrastive fine-tuning for classification, and retrieval-augmented generation to achieve high-accuracy extraction of gamma-ray burst redshifts, thereby significantly enhancing astronomical text mining capabilities.
This paper introduces an efficient ANN-emulator framework for the SCRIPT semi-numerical model that reduces the computational cost of constraining the Epoch of Reionization by up to 70-fold while maintaining statistical fidelity, thereby enabling the analysis of high-dimensional models required for upcoming JWST and 21 cm datasets.
This paper presents a 16-year multi-wavelength study of the TeV blazar TXS 0518+211, revealing complex jet emission properties characterized by high X-ray variability, weak inter-band correlations, and specific orphan flare events, which are best explained by a two-zone leptonic emission model.
This paper presents a model-independent Bayesian search for double-peaked stochastic gravitational-wave backgrounds in LIGO-Virgo-KAGRA O1–O4a data, finding no significant evidence but establishing crucial constraints and a framework for future targeted spectral shape analyses.
Despite a technical malfunction limiting initial observations, analysis of Fermi LAT data and associated solar phenomena indicates that Solar Cycle 25 is stronger than Solar Cycle 24, with an estimated total of approximately 43 to 50 sustained gamma-ray emission events.
This study employs a Bayesian framework with multi-density constraints to demonstrate that current astrophysical observations cannot statistically distinguish between fermionic and bosonic dark matter scenarios in neutron stars, as both models yield consistent nuclear matter parameters and allow only small dark matter fractions that slightly soften the equation of state without violating observational limits.
This paper outlines the ten science themes, observational strategies, and target selection defined by the Mauve science collaboration for the first year of operations of the low-cost Blue Skies Space Ltd. satellite, which utilizes a 13 cm telescope and UV-Vis spectrometer to fill gaps in galactic ultraviolet data following its November 2025 launch.
This study combines theoretical modeling and observational analysis to demonstrate that anomalous microwave emission spectral features are dominantly controlled by grain size, shape, and environmental parameters, revealing that while molecular and dark clouds are consistent with spinning dust models, HII regions show significant discrepancies likely due to PAH depletion and biased detections.
By analyzing high-resolution spectra of quasar pairs at cosmic noon, this study reveals that C IV absorption systems exhibit multiple coherence scales, with a small-scale coherence of approximately 4.7 kpc corresponding to individual clouds and a large-scale coherence of roughly 654 kpc reflecting the extent of C IV-enriched regions and galaxy clustering.
By combining EOVSA microwave imaging spectroscopy with stereoscopic X-ray observations from Hinode and Solar Orbiter, this study reconstructs three-dimensional maps of magnetic field strength and plasma parameters in the SOL2021-05-07 flare, revealing a magnetically dominated environment that provides critical constraints for models of magnetic reconnection and flare dynamics.
This paper extends Jacobson's thermodynamic derivation of gravity to non-extensive horizon entropies by introducing a Topological Calibration Principle that links the effective gravitational coupling to the Euler characteristic of spacetime sections, thereby providing a framework to constrain non-extensive parameters and explore cosmological implications.