New deuterated species in TMC-1: Detection of CH 2 DC 4 H with the QUIJOTE line survey
hal.structure.identifier | National Chiao Tung University [NCTU] | |
dc.contributor.author | CABEZAS, C. | |
hal.structure.identifier | National Chiao Tung University [NCTU] | |
dc.contributor.author | FUENTETAJA, R. | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres [LERMA] | |
dc.contributor.author | ROUEFF, E. | |
hal.structure.identifier | SSE 2012 | |
dc.contributor.author | AGÚNDEZ, M. | |
hal.structure.identifier | Observatorio Astronomico Nacional, Madrid | |
dc.contributor.author | TERCERO, B. | |
hal.structure.identifier | INAF - Osservatorio Astronomico di Bologna [OABO] | |
dc.contributor.author | MARCELINO, N. | |
hal.structure.identifier | National Chiao Tung University [NCTU] | |
dc.contributor.author | PARDO, J. | |
hal.structure.identifier | Observatorio Astronomico Nacional, Madrid | |
dc.contributor.author | DE VICENTE, P. | |
hal.structure.identifier | Instituto de Física Fundamental [Madrid] [IFF] | |
dc.contributor.author | CERNICHARO, J. | |
dc.date.issued | 2021-12-22 | |
dc.identifier.issn | 0004-6361 | |
dc.description.abstractEn | We report the first detection in space of the single deuterated isotopologue of methyldiacetylene, CH 2 DC 4 H. A total of 12 rotational transitions, with J = 8-12 and K a = 0 and 1, were identified for this species in TMC-1 in the 31.0-50.4 GHz range using the Yebes 40m radio telescope. The observed frequencies allowed us to obtain, for the first time, the spectroscopic parameters of this deuterated isotopologue. We derived a column density of (5.5±0.2)×10 11 cm −2. The abundance ratio between CH 3 C 4 H and CH 2 DC 4 H is 24±2. This ratio is similar to that found for the CH 3 C 3 N/CH 2 DC 3 N analogue system, which is 22±2. We did not detect the deuterated species CH 3 C 4 D, which has already been observed in laboratory experiments. The detection of deuterated CH 3 C 4 H allows us to extend the discussion on the chemical mechanisms of deuterium fractionation at work in TMC-1 using a new gas-phase chemical model with multiply deuterated molecules. Introducing a possible deuterium exchange reaction between CH 3 CCH and atomic deuterium allows us to account for the CH 3 C 4 H/CH 2 DC 4 H abundance ratio. | |
dc.language.iso | en | |
dc.publisher | EDP Sciences | |
dc.subject.en | Astrochemistry -ISM | |
dc.subject.en | molecules -ISM | |
dc.subject.en | individual (TMC-1) -line | |
dc.subject.en | identification -molecular data | |
dc.title.en | New deuterated species in TMC-1: Detection of CH 2 DC 4 H with the QUIJOTE line survey | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1051/0004-6361/202142814 | |
dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph] | |
bordeaux.journal | Astronomy and Astrophysics - A&A | |
bordeaux.page | L5 | |
bordeaux.volume | 657 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-03556923 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-03556923v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2021-12-22&rft.volume=657&rft.spage=L5&rft.epage=L5&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=CABEZAS,%20C.&FUENTETAJA,%20R.&ROUEFF,%20E.&AG%C3%9ANDEZ,%20M.&TERCERO,%20B.&rft.genre=article |
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