Eight low-redshift Little Red Dots identified in DESI DR1 exhibit broad Balmer lines, steep decrements, compact shapes, and negligible variability, with a number density roughly 10,000 times lower than at z>4.
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Spatially and spectrally resolved HCN/HCO+ ratios in 18 nearby ULIRGs show outflow or AGN signatures in 16 galaxies, classified into spherical-shell, spectrally-distinct-compact, and filled geometries.
A catalog of 7918 blazars and candidates with nightly optical light curves, quantified variability, and Bayesian blocks-derived flaring periods from three all-sky surveys.
VAR-PZ uses DRW-modeled variability to create photo-z priors that reduce catastrophic outliers in AGN redshift estimates from 32% to below 7% when combined with SED fitting, validated on SDSS data and LSST simulations.
High-resolution spectroscopy of 51 Peg b confirms atmospheric H2O, constrains high metallicity and solar C/O via Bayesian retrieval, and yields an alternative orbital semi-amplitude of 102.8 km/s with revised mass 0.61 MJup and inclination 49.8 deg.
Photometric study identifies 137 PMS stars with median accretion rate 8.0×10^{-9} M⊙/yr in the NGC 346 periphery, showing correlation between accretion properties and distance to hot massive stars.
Low-energy PISNe from 140 solar-mass Pop III stars produce second-generation stars at median [Fe/H] ~ -5.5 with odd-even patterns, but their absence from EMP observations disfavors PISNe as the main early enrichment channel.
Four models for super-early galaxy formation predict similar galaxy bias around 7 for faint galaxies but diverge at brighter luminosities, with the primordial black hole model showing nearly constant bias while others increase to 14.
The ROXs 12 system shows 12CO/13CO ratios of 77 and 55 in the star and companion, with a C/O ratio of 0.54 in the companion.
Simulations find that tidal dwarf galaxies form and persist in galaxy clusters under moderate stellar feedback across all relevant viscosities, supporting their identification as stripped remnants matching multiple observed dwarf galaxy classes.
Large N-body galaxy simulations reveal high chaos with Lyapunov times that extrapolate to Milky Way galaxies being chaotic on timescales ≲ 0.1 Myr.
Void galaxies show modestly higher star formation rates in early spirals and outer disks, lower extinction, and higher gas-fraction proxies than matched galaxies in filaments and walls, suggesting slower quenching in underdense environments.
Simulations from JWST data show GREX-PLUS confusion makes images shallower than JWST but depth improves without plateauing at planned survey limits, with completeness corrections allowing number counts to match JWST results.
AnomalyMatch applied to JWST data identified 58 gravitational lenses, 37 new, graded by experts and spanning redshifts to zphot ~2.1.
AGN activity correlates independently with bar strength and bulge prominence in z≤0.1 galaxies after controlling for mass and color.
Nemesis couples global and local astrophysical simulations to match direct N-body results while scaling efficiently when cores exceed the number of planetary systems.
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Nemesis: A Multi-Scale, Multi-Physics Algorithm for Astrophysics
Nemesis couples global and local astrophysical simulations to match direct N-body results while scaling efficiently when cores exceed the number of planetary systems.