Hot cores in supernova remnant RX J1713.7-3946 exhibit column density ratios of complex organics, deuterated species, and S/N-bearing molecules that are indistinguishable from those in typical star-forming environments.
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Four new transiting giant planets (three Saturn-mass, one dense super-Jupiter) with periods of 1.25-4.17 days have been found orbiting early M-dwarfs, including one around a metal-poor star.
JWST data revises Kamo`oalewa's spectrum to neutral colors consistent with enstatite-rich silicates, models its size at 18 m and albedo at 0.59, and confirms fast rotation.
First robust detection of kpc-scale filamentary H I structures in the CGM/IGM around NGC 4631 with widths 0.5-3.3 kpc, lengths 6.1-49.8 kpc, and three kinematic classes (U-shaped, linear, wavy).
New HST observations of P/2023 V6 (PANSTARRS) document its transition to dormancy and yield a diameter estimate of approximately 340 meters.
N-body simulations with Swiftest show that surface regolith ejected from ellipsoidal Centaurs can form captured proto-ring disks, with highest efficiency from equatorial avalanches.
Cosmic ray transport in molecular cloud simulations boosts star formation efficiency by up to 43% and yields a top-heavier IMF with a high-mass slope shallower by ~20%.
Hydrolyzed haze analogs from water-rich exoplanet conditions show higher absorptivity and a high imaginary refractive index that flattens spectral features in atmospheric models.
MHD collapse simulations define an Envelope-Disk Transition Zone (ENDTRANZ) where a jump in the j-r profile occurs due to positive gravitational torques, with a corresponding jump detected in ALMA observations of L1527 IRS.
Self-consistent curved dust wall models for T Tauri disks indicate that matching observed JHK colors requires millimeter grains lifted 0.5-3 scale heights above the midplane, implying high midplane turbulence.
New stellar occultation data from 2017-2023 indicates Pluto's atmospheric pressure plateaued from 2015 to 2021 and has started to drop, with lower-atmosphere slope changes consistent with haze settling.
Multi-epoch high-resolution spectroscopy reveals a stagnant [O I] gas reservoir at ~1 au in AB Aurigae that feeds high-rate accretion and crushes the stellar magnetosphere.
A new implementation of radial rays and multigroup radiation transport in Athena++ for frequency-dependent stellar irradiation achieves 2-5% average temperature agreement with Monte Carlo benchmarks in hydrostatic disk models using 64 bands.
New Gemini and JWST data show 450P/LONEOS has a 1.8 km nucleus, CO2 gas production of ~7e24 molec/s, water ice absorption, and activity consistent with CO2 release from crystallizing amorphous ice.
The low-mass IMF in Boötes I is consistent with the Milky Way within 68% confidence for broken power-law and lognormal forms, indicating universality at low metallicity.
A Hamiltonian framework maps coupled spin-orbit, spin-spin, and doubly synchronous resonances in ellipsoid binary asteroids and identifies a secondary resonance from nonlinear coupling between primary and secondary synchronous modes.
Catastrophic disruption of differentiated asteroids creates a sheet-like mix of core and mantle fragments with uniform iron-rock ratios that reaccumulate into iron-rich rubble piles if the core is molten.
A new wide-binary coordinate system in REBOUND's TRACE integrator produces qualitatively correct results for planet-planet scattering, stellar flybys, and ZLK oscillations where prior hybrid integrators fail, while matching IAS15 accuracy at up to 9x speed.
Simulations demonstrate that YSO jet properties are controlled by stellar magnetospheric field strength and rotation, producing counter-rotating jets even from non-rotating stars and allowing upper limits on disk toroidal field from observed outflows.
Massive young star clusters clear their natal gas faster than lower-mass clusters, based on HST and JWST imaging of four galaxies.
ALMA comparison finds starless cores in evolved IRBCs have ~2x higher median mass and density than in early IRDCs, favoring competitive accretion over massive prestellar core models for high-mass star formation.
JWST spectra of EC 53 indicate CO fundamental and H2O bending absorption weaken by ~2 during burst due to continuum dilution, with relative veiling yielding hot-continuum ratios of 2.9 and 1.71 and viscous-disk accretion-rate ratios of ~3.6 and ~2.0.
A brown-dwarf companion's close pericenter in KELT-20 imposes dynamical limits that disfavor giant planet formation beyond the water-ice line.
ALMA Cycle 6 data on Aquila dense cores identifies two starless sources and scale-dependent increases in multiplicity, consistent with turbulent core collapse simulations predicting 1.19 starless detections.
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Science from the In Situ Exploration of the Proxima Centauri System
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