Back to Search
Start Over
Submillimeter wave spectroscopy of propanoic acid (CH3CH2COOH) and its ISM search
- Source :
- Journal of Molecular Spectroscopy, Journal of Molecular Spectroscopy, 2021, 379, pp.111454. ⟨10.1016/j.jms.2021.111454⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname, Journal of Molecular Spectroscopy, Elsevier, 2021, 379, pp.111454. ⟨10.1016/j.jms.2021.111454⟩
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- 8 pags., 3 figs., 3 tabs.<br />Three compounds with a CHO formula have been detected in the Interstellar Medium (ISM): ethyl formate (CHCHOC(O)H), methyl acetate (CHOC(O)CH) and very recently hydroxyacetone (CHC(O)CHOH). The higher thermodynamic stability of another isomer, the propanoic acid (CHCHC(O)OH), clearly suggests that this molecule should be considered as a possible candidate for ISM detection. To provide reliable predictions for astronomical use in the millimeter and submillimeter wave ranges we performed a new study of propanoic acid rotational spectrum up to 545 GHz. The analysis of large amplitude methyl top torsional motion in this molecule was carried out using the rho axis method and the RAM36 program code. More than 3200 lines corresponding to the rotational transitions in the ground and first excited methyl top torsional states were newly assigned and fit within experimental error. This enabled us to produce new predictions which were used to search for propanoic acid in two high-mass star-forming regions: SgrB2 (public IRAM 30 m) and Orion KL (ALMA Science Verification). We report a non-detection of propanoic acid in these clouds and derive upper limits to the column density.<br />LM/RAM/JCG acknowledge the support of the Programme National “Physique et Chimie du Milieu Interstellaire” (PCMI) of CNRS/INSU. JCG thanks also the Centre National d’Etudes Spatiales (CNES) for a grant. BT and JC thank Ministerio de Ciencia e Innovaci ́on of Spain (MICIU) for funding support through projects AYA2016-75066-C2-1-P, PID2019-106110 GB-I00, PID2019-107115 GB-C21/ AEI/ 10.13039/ 501100011033, and PID2019-106235 GB-I00. We also thank ERC for funding through grant ERC2013-Syg-610256-NANOCOSMOS. This paper makes use of the following ALMA data: ADS/JAO. ALMA⧹♯2011.0.00009.SV. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan) with NRC (Canada), NSC, and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. This work was also based on observations carried out with the IRAM 30-meter telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain)
- Subjects :
- Methods: laboratory: molecular
Methyl acetate
Line: identification
Analytical chemistry
laboratory: molecular [Methods]
010402 general chemistry
01 natural sciences
Ethyl formate
chemistry.chemical_compound
0103 physical sciences
Molecule
Physical and Theoretical Chemistry
identification [Line]
Spectroscopy
Submillimeter: ISM
molecules [ISM]
Physics
010304 chemical physics
Molecular data
Hydroxyacetone
ISM [Submillimeter]
Atomic and Molecular Physics, and Optics
ISM: molecules
0104 chemical sciences
3. Good health
Interstellar medium
Propanoic acid
chemistry
13. Climate action
Excited state
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
[SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]
Subjects
Details
- Language :
- English
- ISSN :
- 00222852 and 1096083X
- Database :
- OpenAIRE
- Journal :
- Journal of Molecular Spectroscopy, Journal of Molecular Spectroscopy, 2021, 379, pp.111454. ⟨10.1016/j.jms.2021.111454⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname, Journal of Molecular Spectroscopy, Elsevier, 2021, 379, pp.111454. ⟨10.1016/j.jms.2021.111454⟩
- Accession number :
- edsair.doi.dedup.....3f8917c7e383d907fda47eebfa289064
- Full Text :
- https://doi.org/10.1016/j.jms.2021.111454⟩