Analysis of the terahertz rotational ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Analysis of the terahertz rotational spectrum of the three mono-13C ethyl cyanides (13C-CH3CH2CN)
Author(s) :
Richard, C. [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Margulès, Laurent [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Guillemin, Jean-Claude [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Margulès, Laurent [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Guillemin, Jean-Claude [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Journal title :
Astronomy and Astrophysics - A&A
Pages :
135
Publisher :
EDP Sciences
Publication date :
2012-07
ISSN :
0004-6361
English keyword(s) :
line: identification
methods: laboratory
molecular data
techniques: spectroscopic
submillimeter: ISM
ISM: molecules
methods: laboratory
molecular data
techniques: spectroscopic
submillimeter: ISM
ISM: molecules
HAL domain(s) :
Chimie/Chimie organique
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
English abstract : [en]
Context. Millimeter- and submillimeter-wave spectra of regions such as the Orion molecular cloud show many rotational-torsional lines that are caused by the emission of complex organic molecules (COM). Previous laboratory ...
Show more >Context. Millimeter- and submillimeter-wave spectra of regions such as the Orion molecular cloud show many rotational-torsional lines that are caused by the emission of complex organic molecules (COM). Previous laboratory investigations have been conducted for three isotopologues of ethyl cyanide up to 360 GHz, and subsequently, several hundred lines of the three isotopologues have been detected in Orion IRc2 using the IRAM 30 m radiotelescope. Aims: In this survey we present the analysis based on a Watson Hamiltonian for an asymmetric one-top rotor of the 13C-substituted ethyl cyanide 13CH3CH2CN, CH313CH2CN and CH3CH213CN in the frequency range 480-650 GHz and 780-990 GHz. Methods: The rotational spectra of the three species were measured with a submillimeter spectrometer (50-990 GHz) using solid-state sources. Results: A new set of spectroscopic parameters was determined from a least-squares fit procedure for each isotopologue. These parameters permit a new accurate prediction of rotational lines suitable for an astrophysical detection in the submillimeter wave range. Full Tables B.1-B.3 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/543/A135Show less >
Show more >Context. Millimeter- and submillimeter-wave spectra of regions such as the Orion molecular cloud show many rotational-torsional lines that are caused by the emission of complex organic molecules (COM). Previous laboratory investigations have been conducted for three isotopologues of ethyl cyanide up to 360 GHz, and subsequently, several hundred lines of the three isotopologues have been detected in Orion IRc2 using the IRAM 30 m radiotelescope. Aims: In this survey we present the analysis based on a Watson Hamiltonian for an asymmetric one-top rotor of the 13C-substituted ethyl cyanide 13CH3CH2CN, CH313CH2CN and CH3CH213CN in the frequency range 480-650 GHz and 780-990 GHz. Methods: The rotational spectra of the three species were measured with a submillimeter spectrometer (50-990 GHz) using solid-state sources. Results: A new set of spectroscopic parameters was determined from a least-squares fit procedure for each isotopologue. These parameters permit a new accurate prediction of rotational lines suitable for an astrophysical detection in the submillimeter wave range. Full Tables B.1-B.3 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/543/A135Show less >
Language :
Anglais
Popular science :
Non
Source :
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