astrochemistry Archives

Inclination vs. semimajor axis for the NEOs. The main asteroid families that have been linked to ordinary chondrites are represented by gray squares. The ν6 secular resonance with Saturn and the 3:1 and 5:2 mean motion resonances with Jupiter are represented with dashed lines. -- [astro-ph.EP]

Size Constraints For The Pre-atmospheric Parent Bodies Of Ordinary Chondrites

by Keith CowingAugust 9, 2026August 9, 2026

[astro-ph.EP] The study of S-complex near-Earth objects (NEOs), the parent bodies of ordinary chondrites, has shown that they are dominated by asteroids with LL chondrite-like compositions. This is surprising because […]

This scene is from the Carina Nebula, which lies just 7500 light-years away in the constellation Carina (the Keel) larger image --ESA/NASA

Astronomy & Telescopes

Astrochemistry In Action: JWST View Of The Carina Nebula

by Keith CowingAugust 8, 2026August 8, 2026

[ESA] This NASA/ESA/CSA James Webb Space Telescope Picture of the Month takes us to a fantastical realm within our home galaxy, where piercing starlight and billowing winds sculpt dust clouds […]

Herschel H2 column density map (Sadavoy et al. 2012) of Perseus starless and prestellar cores. Labeled in magenta are the locations and names of the 15 starless and prestellar cores analyzed. The star-forming regions within Perseus are denoted in black.-- [astro-ph.GA]

Astrochemistry

Inventories of Rich Carbon-Chain Chemistry in Prestellar and Starless Cores in the Perseus Molecular Cloud

by Keith CowingAugust 8, 2026August 8, 2026

[astro-ph.GA] Carbon-chain molecules serve as an important reservoir of reactive organic matter that will eventually be incorporated into protoplanetary disks, planets, and cometary material. Prestellar and starless cores are composed […]

Example slope (BPAH) measurement for galaxy

Astrochemistry

Variations in the 3.3 µm Polycyclic Aromatic Hydrocarbon Feature Across Nearby Galaxies Driven by Metallicity and Radiation Field Spectrum

by Keith CowingAugust 8, 2026August 8, 2026

[astro-ph.GA] We use JWST NIRCam imaging to investigate the 3.3 μm polycyclic aromatic hydrocarbon (PAH) feature in nearby galaxies. NIRCam observations of the 3.3 μm feature are emerging as a […]