SUBMILLIMETER WAVE SPECTROSCOPY AND ISM SEARCH FOR PROPIONIC ACID

Margulès, L.

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https://hdl.handle.net/2142/104320 Copy

Description

Title

SUBMILLIMETER WAVE SPECTROSCOPY AND ISM SEARCH FOR PROPIONIC ACID

Author(s)

Margulès, L.

Contributor(s)

Guillemin, J.-C. ; Cernicharo, Jose ; Kolesniková, Lucie ; Alonso, Elena R.; Alekseev, E. A.; Dorovskaya, Olga ; Ilyushin, V. ; Motiyenko, R. A.

Issue Date

2019-06-20

Keyword(s)

Mini-symposium: Astrochemistry and Astrobiology in the age of ALMA

Abstract

Two compounds with a C$_{2}$H$_{4}$O$_{2}$ formula have been detected in the Interstellar Medium (ISM): acetic acid (CH$_{3}$CO$_{2}$H) and methyl formate (CH$_{3}$OC(O)H), the latter being thermodynamically less stable than the former but more abundant. Among the higher homologues with a C$_{3}$H$_{6}$O$_{2}$ formula where a hydrogen atom in C$_{2}$H$_{4}$O$_{2}$ has been replaced by a CH$_{3}$ group, two compounds have already been detected: ethyl formate (EtOC(O)H) and methyl acetate (CH$_{3}$OC(O)CH$_{3}$). The higher thermodynamic stability of another isomer, the propionic acid (EtCO$_{2}$H), pushed us to record its rotational spectrum, since this compound has a high probability of being present in the ISM. The methyl top internal rotation should be taken into account, therefore the analysis is performed using RAM36 code.\footnote{Ilyushin, V.V. et al;{\em J. Mol. Spectrosc.}~{\bf259}, (2010) 26} The spectroscopic results and its search in ISM will be presented.\\ \em{This work was supported by the CNES and the Action sur Projets de l'INSU, PCMI}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/104320

DOI

10.15278/isms.2019.RG08

Copyright and License Information

Copyright 2019 L. Margulès

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