RT Journal Article
T1 Microwave and submillimeter spectroscopy and first ISM detection of 18O-methyl formate
A1 Tercero, B.
A1 Margulès, L.
A1 Carvajal Zaera, Miguel
A1 Motiyenko, R. A.
A1 Huet, Thérèse R.
A1 Alekseev, E. A.
A1 Kleiner, I.
A1 Guillemin, J. C.
A1 Møllendal, H.
A1 Cernicharo, J.
AB Context. Astronomical survey of interstellar molecular clouds needs a previous analysis of the spectra in the microwave and sub-mmenergy range to be able to identify them. We obtained very accurate spectroscopic constants in a comprehensive laboratory analysisof rotational spectra. These constants can be used to predict transition frequencies that were not measured in the laboratory veryprecisely.Aims. We present an experimental study and a theoretical analysis of two 18O-methyl formate isotopologues, which were subsequentlydetected 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 to660 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 assignedand others predicted, which allowed us to detect both species in the IRAM 30 m line survey of Orion KL.
PB EDP Sciences
SN 0004-6361
YR 2012
FD 2012
LK http://hdl.handle.net/10272/6562
UL http://hdl.handle.net/10272/6562
LA eng
NO Tercero, B.,  Margulès, L., Carvajal Zaera, M., Motiyenko, R. A., Huet, T. R., Alekseev, E. A., Kleiner, I., Guillemin, J. C., Møllendal, H.: "Microwave and submillimeter spectroscopy and first ISM detection of 18O-methyl formate". Astronomy and Astrophysics. Vol. 538, A119 (2012). ISSN  0004-6361
NO M.C. acknowledges the financial support provided by the Andalusian Government (Spain) project number P07-FQM-03014. He also thanks Universite Paris 12 for inviting him. J.C. and B.T. thank Spanish MICINN for support under grants AYA2006-14786, AYA2009-07304 and the CONSOLIDER program "ASTROMOL" CSD2009-00038. This work was supported by the Centre National d'Etudes Spatiales (CNES) and the Action sur Projets de l'INSU, "Physique et Chimie du Milieu Interstellaire". This work was also done under the ANR-08-BLAN-0054.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026