malonaldehyde Archives - Astrobiology

Undetected lines of 3-hydroxypropenal that are predicted above 3σ with the new spectroscopic data and the parameters previously constrained by Coutens et al. (2022) for an excitation temperature Tex = 300 K. The PILS observations are in black. The model in red has been obtained with the best-fit parameters derived by Coutens et al. (2022) for Tex = 300 K, i.e. with a column density N = 1.8 × 1015 cm−2 . For comparison, the model obtained for Tex = 125 K (N = 1.0 × 1015 cm−2 ) is added in magenta. The cyan dotted line represents the 3 rms level per 0.33 km s−1 (1/3 of the line width). -- astro-ph.GA

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Interstellar, Status Report

The Rotation-tunneling Spectrum Of 3-hydroxypropenal And Confirmation Of Its Detection Toward IRAS 16293−2422 B

by Keith CowingMay 3, 2024May 3, 2024

3-Hydroxypropenal (HOCHCHCHO) is the lower energy tautomer of malonaldehyde which displays a complex rotation-tunneling spectrum.