964 papers
Using James Webb Space Telescope spectroscopy, researchers identified LAP1-B, an ultra-faint, chemically primitive galaxy at redshift 6.625 with the lowest known metallicity and a dominant dark matter halo, providing direct evidence of an early-stage galaxy progenitor that serves as a high-redshift analog to local ancient dwarf galaxies.
This study presents a modified commercial laser mass spectrometer that serves as a validated, high-fidelity analog for the Mars Organic Molecule Analyzer (MOMA), enabling rapid testing, structural identification of organics in mineral matrices, and the generation of pre-flight reference data to support the upcoming Rosalind Franklin rover mission.
This paper demonstrates that Variational Autoencoders can effectively compress and analyze approximately 200,000 DESI galaxy spectra to identify both instrumental artifacts and unique astrophysical objects, while also revealing interpretable latent structures that separate object classes and track physical characteristics like star formation and emission lines.
The BoRG- survey reveals that analogs of the UV-luminous "blue monster" galaxies at are dust-poor systems experiencing stochastic star formation bursts, suggesting that the extreme brightness of the higher-redshift population is driven by very young stellar populations under 100 Myr old rather than dominant active galactic nuclei.
Using JWST observations, researchers identified a remarkably evolved protocluster core at containing 23 galaxies with a total stellar mass exceeding $10^{10}\ \rm{M_{\odot}}$, where massive, dusty galaxies in the core are undergoing a synchronized quenching phase distinct from the bursty star formation in the outskirts, marking the most extreme overdensity observed at this early epoch.
By modeling Active Region 12760 with the GX Simulator, the authors demonstrate that while a specific power-law heating model fits EUV intensities, the underestimation of emission in cooler bands reveals that the upper transition region of peripheral loops extends significantly beyond the foot points, necessitating its inclusion in future solar heating models.
This paper presents a non-parametric Bayesian framework applied to GWTC-3 and GWTC-4 data that reveals tentative evidence for a linear redshift-dependent evolution in the mass distribution of high-mass binary black holes (), while finding no significant evolution for lower-mass systems and no quadratic dependence up to redshift .
This paper demonstrates that multiband measurements of relativistic corrections to the Sunyaev-Zel'dovich effect can successfully detect and constrain the thermodynamics of superheated gas in the major merger MACS J0717.5+3745, yielding temperature estimates consistent with X-ray observations.
This study characterizes the bright K-dwarf system TOI-5789, revealing a mutually inclined architecture with four planets including a promising sub-Neptune (TOI-5789 c) ideal for atmospheric studies, while ruling out an outer giant planet as the cause of the system's dynamical tilt.
Using data from the Large High Altitude Air Shower Observatory (LHAASO), researchers report the first detection of ultra-high-energy gamma-ray emission (exceeding 100 TeV) from the binary system LS I +61 303, providing compelling evidence for extreme particle acceleration and orbital modulation that suggests a composite leptonic and hadronic emission scenario.
This paper introduces a novel statistical method using astrometric asymmetries in lensed arcs to constrain the dark matter subhalo mass fraction in galaxy clusters, demonstrating its reliability through simulations and preliminary applications to JWST observations of MACSJ0416 and AS1063 that yield results consistent with Cold Dark Matter predictions.
This study employs comprehensive Monte Carlo simulations to demonstrate that uncertainties in nuclear reaction rates can induce multi-peak abundance distributions for specific isotopes in Type I X-ray bursts, while also refining the identification of key reactions for future research.
This paper presents an updated multiwavelength version of the G4Jy catalogue with 127 new host-galaxy identifications and enhanced redshift data, while introducing a novel radio-power–size–spectral-curvature analysis that reveals distinct populations of remnant, young, and restarted radio galaxies alongside new insights into their host-galaxy properties and infrared colors.
This paper demonstrates that adopting standardized computer vision architectures pre-trained on astronomical data, particularly from Galaxy Zoo, significantly improves the performance and efficiency of alert classification in wide-field time-domain surveys compared to traditional custom CNNs trained from scratch.
This paper proposes that the unexpectedly high-redshift sources detected by JWST, which may be contaminants or candidates at , could instead be hyper-energetic pair-instability supernovae from the first metal-free stars, a scenario supported by cosmological simulations showing a non-negligible chance of such detections that would provide direct evidence of the epoch of first star formation.
This paper introduces BLISS, a simulation-based inference framework that utilizes convolutional neural networks and denoising autoencoders to probabilistically detect, deblend, and measure galaxy properties in crowded astronomical images, demonstrating significant improvements in flux accuracy for blended and faint objects compared to deterministic methods.
By coupling radiation-hydrodynamic simulations with radiative-transfer calculations for the type-1 Seyfert galaxy NGC 3783, this study demonstrates that the observed broad Br line profile arises from intrinsic emission by a rotating thin disk that is significantly broadened and smoothed by electron scattering in a surrounding diffuse ionized haze.
This paper introduces SPONCHPOP, a novel planet population synthesis model that incorporates multi-phase sulfur chemistry to demonstrate how volatile sulfur serves as a powerful diagnostic tool for tracing gas giant formation histories and predicting the sulfur budgets of rocky planets.
This paper utilizes wave energy relations to demonstrate that strong non-adiabatic effects cause convective modes to abruptly transition from monotonically growing to oscillatory behavior, where entropy energy functions as potential energy and overlaps with gravity energy.
This paper demonstrates that cross-correlating photometric galaxies with Lyman- forest data using a novel theoretical framework can reliably calibrate the redshift distribution of high-redshift () galaxy samples, achieving a mean redshift precision of at in simulations of future DESI and LSST surveys.