Rotational spectroscopy of oxirane-2,2-d2, c-CD2CH2O, and its tentative detection toward IRAS 16293-2422 B
| Autor: | Müller, Holger S. P., Jørgensen, Jes K., Guillemin, Jean-Claude, Lewen, Frank, Schlemmer, Stephan |
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| Přispěvatelé: | Universität zu Köln = University of Cologne, University of Copenhagen = Københavns Universitet (UCPH), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), National Science Foundation, NSF, National Aeronautics and Space Administration, NASA, National Radio Astronomy Observatory, NRAO, Associated Universities, AUI, Centre national d'études spatiales, CNES, National Research Council Canada, NRC, Deutsche Forschungsgemeinschaft, DFG: 184018867, SCHL 341/15-1, National Science Council, NSC, Centre National d’Etudes Spatiales, CNES: 4500065585, Korea Astronomy and Space Science Institute, KASI, National Institutes of Natural Sciences, NINS, National Astronomical Observatory of Japan, NAOJ, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA, Danmarks Frie Forskningsfond, DFF: 0135-00123B |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Rotational spectroscopy
Reduced Hamiltonian FOS: Physical sciences Interstellar molecule Astrophysics - Astrophysics of Galaxies Astrophysics - Solar and Stellar Astrophysics Astrophysics of Galaxies (astro-ph.GA) [CHIM]Chemical Sciences Physics - Atomic and Molecular Clusters Submillimeter spectroscopy Astrophysics - Instrumentation and Methods for Astrophysics Atomic and Molecular Clusters (physics.atm-clus) Molecular symmetry Instrumentation and Methods for Astrophysics (astro-ph.IM) Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | Journal of Molecular Spectroscopy Journal of Molecular Spectroscopy, 2023, 394, pp.111777. ⟨10.1016/j.jms.2023.111777⟩ |
| ISSN: | 0022-2852 1096-083X |
| DOI: | 10.1016/j.jms.2023.111777⟩ |
| Popis: | We prepared a sample of oxirane doubly deuterated at one C atom and studied its rotational spectrum in the laboratory for the first time between 120~GHz and 1094~GHz. Accurate spectroscopic parameters up to eighth order were determined, and the calculated rest frequencies were used to identify $c$-CD$_2$CH$_2$O tentatively in the interstellar medium in the Atacama Large Millimeter/submillimeter Array Protostellar Interferometric Line Survey (PILS) of the Class 0 protostellar system IRAS 16293$-$2422. The $c$-CD$_2$CH$_2$O to $c$-C$_2$H$_4$O ratio was estimated to be $\sim$0.054 with $T_{\rm rot} = 125$ K. This value translates to a D-to-H ratio of $\sim$0.16 per H atom which is higher by a factor of 4.5 than the $\sim$0.036 per H atom obtained for $c$-C$_2$H$_3$DO. Such increase in the degree of deuteration referenced to one H atom in multiply deuterated isotopologs compared to their singly deuterated variants have been observed commonly in recent years. Comment: Journal of Molecular Spectroscopy, in press; Per Jensen special issue. 12 pages here |
| Databáze: | OpenAIRE |
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