Title :

Microwave and submillimeter spectroscopy and first ISM detection of 18O-methyl formate

Author(s) :

Tercero, B. [Auteur]
Centro de Astrobiologia [Madrid] [CAB]
Margulès, Laurent [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Carvajal, M. [Auteur]
Universidad de Huelva
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Huet, Therese [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Alekseev, E. A. [Auteur]
Institute of Radio Astronomy of NAS of Ukraine [IRA]
Kleiner, I. [Auteur]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Guillemin, Jean-Claude [Auteur]
Institut des Sciences Chimiques de Rennes [ISCR]
Møllendal, Harald [Auteur]
Centre for Theoretical and Computational Chemistry [Oslo] [CTCC]
Cernicharo, J. [Auteur]
Centro de Astrobiologia [Madrid] [CAB]

Journal title :

Astronomy and Astrophysics - A&A

Pages :

119

Publisher :

EDP Sciences

Publication date :

2012-02

ISSN :

0004-6361

English keyword(s) :

submillimeter: ISM
line: identification
astronomical databases: miscellaneous
ISM: individual objects: Orion KL
ISM: molecules
astrochemistry

HAL domain(s) :

Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Chimie/Chimie organique
Chimie/Chimie théorique et/ou physique
Physique [physics]/Physique Quantique [quant-ph]
Physique [physics]/Physique [physics]/Physique Atmosphérique et Océanique [physics.ao-ph]
Planète et Univers [physics]

English abstract : [en]

Context. Astronomical survey of interstellar molecular clouds needs a previous analysis of the spectra in the microwave and sub-mm energy range to be able to identify them. We obtained very accurate spectroscopic constants ...
Show more >Context. Astronomical survey of interstellar molecular clouds needs a previous analysis of the spectra in the microwave and sub-mm energy range to be able to identify them. We obtained very accurate spectroscopic constants in a comprehensive laboratory analysis of rotational spectra. These constants can be used to predict transition frequencies that were not measured in the laboratory very precisely. Aims: We present an experimental study and a theoretical analysis of two 18O-methyl formate isotopologues, which were subsequently detected for the first time in Orion KL. Methods: The experimental spectra of both methyl formate isotopologues recorded in the microwave and sub-mm range from 1 to 660 GHz. Both spectra were analysed by using the rho-axis method (RAM) which takes into account the CH3 internal rotation. Results: We obtained spectroscopic constants of both 18O- methyl formate with high accuracy. Thousands of transitions were assigned and others predicted, which allowed us to detect both species in the IRAM 30 m line survey of Orion KL. Full Tables A.1 et A.2 are 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/538/A119Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL