Submillimeter-wave spectroscopy and the ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Submillimeter-wave spectroscopy and the radio-astronomical investigation of propynethial (HC≡CCHS)
Auteur(s) :
Margulès, L. [Auteur correspondant]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Université de Lille
Mcguire, B. A. [Auteur]
National Radio Astronomy Observatory [NRAO]
Evans, C. J. [Auteur]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Remijan, A. [Auteur]
National Academy of Sciences of Ukraine [NASU]
Kharkov National University
Guillemin, J. C. [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Wong, A. [Auteur]
Institut Rayonnement Matière de Saclay (DRF) [IRAMIS]
Mcnaughton, D. [Auteur]
James Cook University [JCU]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Université de Lille
Mcguire, B. A. [Auteur]
National Radio Astronomy Observatory [NRAO]
Evans, C. J. [Auteur]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Remijan, A. [Auteur]
National Academy of Sciences of Ukraine [NASU]
Kharkov National University
Guillemin, J. C. [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Wong, A. [Auteur]
Institut Rayonnement Matière de Saclay (DRF) [IRAMIS]
Mcnaughton, D. [Auteur]
James Cook University [JCU]
Titre de la revue :
Astronomy and Astrophysics - A&A
Pagination :
A206
Éditeur :
EDP Sciences
Date de publication :
2020-10
ISSN :
0004-6361
Mot(s)-clé(s) en anglais :
ISM: molecules
methods: laboratory: molecular
submillimeter: ISM
molecular data
line: identification
methods: laboratory: molecular
submillimeter: ISM
molecular data
line: identification
Discipline(s) HAL :
Physique [physics]/Astrophysique [astro-ph]
Résumé en anglais : [en]
Context. The majority of sulfur-containing molecules detected in the interstellar medium (ISM) are analogs of oxygen-containing compounds. Propynal was detected in the ISM in 1988, hence propynethial, its sulfur derivative, ...
Lire la suite >Context. The majority of sulfur-containing molecules detected in the interstellar medium (ISM) are analogs of oxygen-containing compounds. Propynal was detected in the ISM in 1988, hence propynethial, its sulfur derivative, is a good target for an ISM search.Aims. Our aim is to measure the rotational spectrum of propynethial and use those measurements to search for this species in the ISM. To date, measurements of the rotational spectra of propynethial have been limited to a small number or transitions below 52 GHz. The extrapolation of the prediction to lines in the milimeter-wave domain is inaccurate and does not provide data to permit an unambiguous detection.Methods. The rotational spectrum was re-investigated up to 630 GHz. Using the new prediction lines of propynethial, as well as the related propynal, a variety of astronomical sources were searched, including star-forming regions and dark clouds.Conclusions. A total of 3288 transitions were newly assigned and fit together with those from previous studies, reaching quantum numbers up to J = 107 and Ka = 24. Watson’s symmetric top Hamiltonian in the Ir representation was used for the analysis, because the molecule is very close to the prolate limit. The search for propynethial resulted in a non-detection; upper limits to the column density were derived in each source.Lire moins >
Lire la suite >Context. The majority of sulfur-containing molecules detected in the interstellar medium (ISM) are analogs of oxygen-containing compounds. Propynal was detected in the ISM in 1988, hence propynethial, its sulfur derivative, is a good target for an ISM search.Aims. Our aim is to measure the rotational spectrum of propynethial and use those measurements to search for this species in the ISM. To date, measurements of the rotational spectra of propynethial have been limited to a small number or transitions below 52 GHz. The extrapolation of the prediction to lines in the milimeter-wave domain is inaccurate and does not provide data to permit an unambiguous detection.Methods. The rotational spectrum was re-investigated up to 630 GHz. Using the new prediction lines of propynethial, as well as the related propynal, a variety of astronomical sources were searched, including star-forming regions and dark clouds.Conclusions. A total of 3288 transitions were newly assigned and fit together with those from previous studies, reaching quantum numbers up to J = 107 and Ka = 24. Watson’s symmetric top Hamiltonian in the Ir representation was used for the analysis, because the molecule is very close to the prolate limit. The search for propynethial resulted in a non-detection; upper limits to the column density were derived in each source.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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