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http://hdl.handle.net/10261/234114
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dc.contributor.author | Bizzocchi, L. | - |
dc.contributor.author | Prudenzano, D. | - |
dc.contributor.author | Rivilla, Victor M. | - |
dc.contributor.author | Pietropolli-Charmet, A. | - |
dc.contributor.author | Giuliano, B.M. | - |
dc.contributor.author | Caselli, P. | - |
dc.contributor.author | Martín-Pintado, Jesús | - |
dc.contributor.author | Jiménez-Serra, Izaskun | - |
dc.contributor.author | Martín, S. | - |
dc.contributor.author | Requena-Torres, M.A. | - |
dc.contributor.author | Rico-Villas, Fernando | - |
dc.contributor.author | Zeng, S. | - |
dc.contributor.author | Guillemin, Jean-Claude | - |
dc.date.accessioned | 2021-03-11T08:10:06Z | - |
dc.date.available | 2021-03-11T08:10:06Z | - |
dc.date.issued | 2020 | - |
dc.identifier | doi: 10.1051/0004-6361/202038083 | - |
dc.identifier | issn: 1432-0746 | - |
dc.identifier.citation | Astronomy and Astrophysics 640 (2020) | - |
dc.identifier.uri | http://hdl.handle.net/10261/234114 | - |
dc.description.abstract | Context. Small imines containing up to three carbon atoms are present in the interstellar medium (ISM). As alkynyl compounds are abundant in this medium, propargylimine (2-propyn-1-imine, HC C-CH =NH) thus represents a promising candidate for a new interstellar detection. Aims. The goal of the present work is to perform a comprehensive laboratory investigation of the rotational spectrum of propargylimine in its ground vibrational state in order to obtain a highly precise set of rest frequencies and to search for it in space. Methods. The rotational spectra of E and Z geometrical isomers of propargylimine have been recorded in the laboratory in the 83-500 GHz frequency interval. The measurements have been performed using a source-modulation millimetre-wave spectrometer equipped with a pyrolysis system for the production of unstable species. High-level ab initio calculations were performed to assist the analysis and to obtain reliable estimates for an extended set of spectroscopic quantities. We searched for propargylimine at 3 mm and 2 mm in the spectral survey of the quiescent giant molecular cloud G+0.693-0.027 located in the central molecular zone, close to the Galactic centre. Results. About 1000 rotational transitions have been recorded for the E-and Z-propargylimine, in the laboratory. These new data have enabled the determination of a very accurate set of spectroscopic parameters including rotational, quartic, and sextic centrifugal distortion constants. The improved spectral data allowed us to perform a successful search for this new imine in the G+0.693-0.027 molecular cloud. Eighteen lines of Z-propargylimine were detected at level >2.5σ, resulting in a column-density estimate of N = (0.24 ± 0.02) × 1014 cm-2. An upper limit was retrieved for the higher energy E isomer, which was not detected in the data. The fractional abundance (with respect to H2) derived for Z-propargylimine is 1.8 × 10-10. We discuss the possible formation routes by comparing the derived abundance with those measured in the source for possible chemical precursors. | - |
dc.description.sponsorship | With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737) | - |
dc.language | eng | - |
dc.publisher | Springer Nature | - |
dc.rights | openAccess | - |
dc.title | Propargylimine in the laboratory and in space: Millimetre-wave spectroscopy and its first detection in the ISM | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1051/0004-6361/202038083 | - |
dc.relation.publisherversion | http://dx.doi.org/10.1051/0004-6361/202038083 | - |
dc.date.updated | 2021-03-11T08:10:06Z | - |
dc.relation.csic | Sí | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | none | - |
item.fulltext | No Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
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