[astro-ph.GA] We find that the aromatic and aliphatic emission bands in four carbon-rich post-asymptotic giant branch stars with class D emission arise from a single carrier population: extensive aliphatic decoration […]
Aliphatic
Posted inAstrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Press Release
JWST Observations Of Photo-dissociation Regions. II. Aliphatic/Aromatic Carbonaceous Dust, Ices, And Gas Phase Spectral Line Inventory
This paper provides an overview of the spectroscopic data obtained by the JWST Guaranteed Time Observations (GTO) program 1192, “The Physics and Chemistry of PDR Fronts”, including an inventory of […]
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report
Battle of the CH Motions: aliphatic vs. Aromatic Contributions to Astronomical PAH Emission and Exploration of the Aliphatic, Aromatic, and Ethynyl CH Stretches
Strong anharmonic coupling between vibrational states in polycyclic aromatic hydrocarbons (PAH) produces highly mixed vibrational transitions that challenge the current understanding of the nature of the astronomical mid-infrared PAH emission […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Comets and Asteroids, Imaging & Spectroscopy, Status Report
JWST Near-infrared Spectroscopy Of The Lucy Jupiter Trojan Flyby Targets: Evidence For OH Absorption, Aliphatic Organics, And CO2
We present JWST/NIRSpec observations of the five Jupiter Trojans that will be visited by the Lucy spacecraft — the Patroclus–Menoetius binary, Eurybates, Orus, Leucus, and Polymele.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Status Report
Aliphatics And Aromatics In The Universe: The Pre-JWST Era
The so-called “unidentified infrared emission” (UIE) features at 3.3, 6.2, 7.7, 8.6, and 11.3 micron ubiquitously seen in a wide variety of astrophysical regions are generally attributed to polycyclic aromatic […]