Rotational Spectroscopy and Tentative Interstellar Detection of 3-hydroxypropanal (HOCH2CH2CHO) in the G+0.693-0.027 Molecular Cloud
Name
Fried_2025_ApJ_992_187 (1).pdf
Description
Published version
Size
10.73 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Fried, Zachary TP
Motiyenko, Roman A
Sanz-Novo, Miguel
Kolesniková, Lucie
Guillemin, Jean-Claude
Margulès, Laurent
Uhlíková, Tereza
Belloche, Arnaud
Jørgensen, Jes K
Holdren, Martin S
Date Issued
October 14, 2025
Journal
The Astrophysical Journal
Publisher
American Astronomical Society
Citation
Zachary T. P. Fried et al 2025 ApJ 992 187
Version
Final published version
Abstract
We synthesized the astrochemically relevant molecule 3-hydroxypropanal (HOCH2CH2CHO) and subsequently measured and analyzed its rotational spectrum in several frequency regions ranging from 130 to 485 GHz. We analyzed the ground vibrational state as well as the two perturbed lowest-lying vibrationally excited states. With the resulting rotational parameters, we searched for this molecule in the Sagittarius B2(N) and NGC 6334I hot cores, the IRAS 16293-2422B hot corino, and the G+0.693-0.027 and TMC-1 molecular clouds. Rotational emission of 3-hydroxypropanal was tentatively detected toward G+0.693-0.027, and a column density of (8.6 ±1.4) × 1012 cm−2 was determined. However, this molecule was not detected in the other sources that were investigated. The chemical implications of this tentative discovery are analyzed, and several potential chemical formation pathways of this species are discussed.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.3847/1538-4357/adfc62
