Millimeter wave spectra of carbonyl cyanide
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Millimeter wave spectra of carbonyl cyanide
Auteur(s) :
Bteich, S.B. [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Tercero, B., [Auteur]
Instituto de Ciencia de Materiales de Madrid [ICMM]
Cernicharo, J., [Auteur]
Instituto de Ciencia de Materiales de Madrid [ICMM]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Margulès, L., [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Guillemin, J.-C., [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Tercero, B., [Auteur]
Instituto de Ciencia de Materiales de Madrid [ICMM]
Cernicharo, J., [Auteur]
Instituto de Ciencia de Materiales de Madrid [ICMM]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Margulès, L., [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Guillemin, J.-C., [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Titre de la revue :
Astronomy and Astrophysics - A&A
Pagination :
A43
Éditeur :
EDP Sciences
Date de publication :
2016
ISSN :
0004-6361
Mot(s)-clé(s) en anglais :
Astrophysics
Atoms
Cyanides
Excited states
Ground state
Molecules
Quantum theory
ISM: abundance
ISM: molecules
Line: identification
Methods: laboratory
Molecular data
Submillimeter: isms
Millimeter waves
Atoms
Cyanides
Excited states
Ground state
Molecules
Quantum theory
ISM: abundance
ISM: molecules
Line: identification
Methods: laboratory
Molecular data
Submillimeter: isms
Millimeter waves
Discipline(s) HAL :
Chimie
Résumé en anglais : [en]
Context. More than 30 cyanide derivatives of simple organic molecules have been detected in the interstellar medium, but only one dicarbonitrile has been found and that very recently. There is still a lack of high-resolution ...
Lire la suite >Context. More than 30 cyanide derivatives of simple organic molecules have been detected in the interstellar medium, but only one dicarbonitrile has been found and that very recently. There is still a lack of high-resolution spectroscopic data particularly for dinitriles derivatives. The carbonyl cyanide molecule is a new and interesting candidate for astrophysical detection. It could be formed by the reaction of CO and CN radicals, or by substitution of the hydrogen atom by a cyano group in cyanoformaldehyde, HC(=O)CN, that has already been detected in the interstellar medium. Aims. The available data on the rotational spectrum of carbonyl cyanide is limited in terms of quantum number values and frequency range, and does not allow accurate extrapolation of the spectrum into the millimeter-wave range. To provide a firm basis for astrophysical detection of carbonyl cyanide we studied its millimeter-wave spectrum. Methods. The rotational spectrum of carbonyl cyanide was measured in the frequency range 152-308 GHz and analyzed using Watson's A- and S-reduction Hamiltonians. Results. The ground and first excited state of v5, vibrational mode were assigned and analyzed. More than 1100 distinct frequency lines of the ground state were fitted to produce an accurate set of rotational and centrifugal distortion constants up to the eighth order. The frequency predictions based on these constants should be accurate enough for astrophysical searches in the frequency range up to 500 GHz and for transition involving energy levels with J ≤ 100 and Ka ≤ 42. Based on the results we searched for interstellar carbonyl cyanide in available observational data without success. Thus, we derived upper limits to its column density in di erent sources. © ESO 2016.Lire moins >
Lire la suite >Context. More than 30 cyanide derivatives of simple organic molecules have been detected in the interstellar medium, but only one dicarbonitrile has been found and that very recently. There is still a lack of high-resolution spectroscopic data particularly for dinitriles derivatives. The carbonyl cyanide molecule is a new and interesting candidate for astrophysical detection. It could be formed by the reaction of CO and CN radicals, or by substitution of the hydrogen atom by a cyano group in cyanoformaldehyde, HC(=O)CN, that has already been detected in the interstellar medium. Aims. The available data on the rotational spectrum of carbonyl cyanide is limited in terms of quantum number values and frequency range, and does not allow accurate extrapolation of the spectrum into the millimeter-wave range. To provide a firm basis for astrophysical detection of carbonyl cyanide we studied its millimeter-wave spectrum. Methods. The rotational spectrum of carbonyl cyanide was measured in the frequency range 152-308 GHz and analyzed using Watson's A- and S-reduction Hamiltonians. Results. The ground and first excited state of v5, vibrational mode were assigned and analyzed. More than 1100 distinct frequency lines of the ground state were fitted to produce an accurate set of rotational and centrifugal distortion constants up to the eighth order. The frequency predictions based on these constants should be accurate enough for astrophysical searches in the frequency range up to 500 GHz and for transition involving energy levels with J ≤ 100 and Ka ≤ 42. Based on the results we searched for interstellar carbonyl cyanide in available observational data without success. Thus, we derived upper limits to its column density in di erent sources. © ESO 2016.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
Fichiers
- https://www.aanda.org/articles/aa/pdf/2016/08/aa28379-16.pdf
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- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5058435/pdf
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