Searching for Trans Ethyl Methyl Ether in Orion KL
Type de document :
Compte-rendu et recension critique d'ouvrage
PMID :
Titre :
Searching for Trans Ethyl Methyl Ether in Orion KL
Auteur(s) :
Tercero, B., [Auteur]
Cernicharo, J., [Auteur]
Departamento de Astrofísica Molecular e Infrarroja [DAMIR]
López, A., [Auteur]
Departamento de Astrofísica Molecular e Infrarroja [DAMIR]
Brouillet, N. [Auteur]
Kolesniková, L., [Auteur]
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]
Alonso, J. L., [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Guillemin, J.-C., [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Cernicharo, J., [Auteur]
Departamento de Astrofísica Molecular e Infrarroja [DAMIR]
López, A., [Auteur]
Departamento de Astrofísica Molecular e Infrarroja [DAMIR]
Brouillet, N. [Auteur]
Kolesniková, L., [Auteur]
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]
Alonso, J. 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 :
1-39
Éditeur :
EDP Sciences
Date de publication :
2015
ISSN :
0004-6361
Mot(s)-clé(s) en anglais :
clouds
abundances
radio lines
molecules
individual objects (Orion KL)
surveys
abundances
radio lines
molecules
individual objects (Orion KL)
surveys
Discipline(s) HAL :
Planète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
Résumé en anglais : [en]
We report on the tentative detection of trans ethyl methyl ether (tEME), t-CHCHOCH, through the identification of a large number of rotational lines from each one of the spin states of the molecule towards Orion KL. We ...
Lire la suite >We report on the tentative detection of trans ethyl methyl ether (tEME), t-CHCHOCH, through the identification of a large number of rotational lines from each one of the spin states of the molecule towards Orion KL. We also search for gauche-trans-n-propanol, Gt-n-CHCHCHOH, an isomer of tEME in the same source. We have identified lines of both species in the IRAM 30 m line survey and in the ALMA Science Verification data. We have obtained ALMA maps to establish the spatial distribution of these species. Whereas tEME mainly arises from the compact ridge component of Orion, Gt-n-propanol appears at the emission peak of ethanol (south hot core). The derived column densities of these species at the location of their emission peaks are ≤(4.0 ± 0.8) × 10 cm and ≤(1.0 ± 0.2)× 10 cm for tEME and Gt-n-propanol, respectively. The rotational temperature is ~100 K for both molecules. We also provide maps of CHOCOH, CHCHOCOH, CHOCH, CHOH, and CHCHOH to compare the distribution of these organic saturated O-bearing species containing methyl and ethyl groups in this region. Abundance ratios of related species and upper limits to the abundances of non-detected ethers are provided. We derive an abundance ratio (CHOCH)/(tEME) ≥ 150 in the compact ridge of Orion.Lire moins >
Lire la suite >We report on the tentative detection of trans ethyl methyl ether (tEME), t-CHCHOCH, through the identification of a large number of rotational lines from each one of the spin states of the molecule towards Orion KL. We also search for gauche-trans-n-propanol, Gt-n-CHCHCHOH, an isomer of tEME in the same source. We have identified lines of both species in the IRAM 30 m line survey and in the ALMA Science Verification data. We have obtained ALMA maps to establish the spatial distribution of these species. Whereas tEME mainly arises from the compact ridge component of Orion, Gt-n-propanol appears at the emission peak of ethanol (south hot core). The derived column densities of these species at the location of their emission peaks are ≤(4.0 ± 0.8) × 10 cm and ≤(1.0 ± 0.2)× 10 cm for tEME and Gt-n-propanol, respectively. The rotational temperature is ~100 K for both molecules. We also provide maps of CHOCOH, CHCHOCOH, CHOCH, CHOH, and CHCHOH to compare the distribution of these organic saturated O-bearing species containing methyl and ethyl groups in this region. Abundance ratios of related species and upper limits to the abundances of non-detected ethers are provided. We derive an abundance ratio (CHOCH)/(tEME) ≥ 150 in the compact ridge of Orion.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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- https://hal.archives-ouvertes.fr/hal-01197453/document
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- http://arxiv.org/pdf/1509.00179
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- https://hal.archives-ouvertes.fr/hal-01197453/document
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- https://hal.archives-ouvertes.fr/hal-01197453/document
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- Searching%20for%20Trans%20Ethyl%20Methyl_accepted.pdf
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- 1509.00179
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