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Discovery of H 2 CCCH + in TMC-1

dc.contributor.authorSILVA, W. G. D. P.
dc.contributor.authorCERNICHARO, J.
dc.contributor.authorSCHLEMMER, S.
dc.contributor.authorMARCELINO, N.
dc.contributor.authorLOISON, J. -C.
dc.contributor.authorAGÚNDEZ, M.
dc.contributor.authorGUPTA, D.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorWAKELAM, V.
dc.contributor.authorTHORWIRTH, S.
dc.contributor.authorCABEZAS, C.
dc.contributor.authorTERCERO, B.
dc.contributor.authorDOMÉNECH, J. L.
dc.contributor.authorFUENTETAJA, R.
dc.contributor.authorKIM, W. -J.
dc.contributor.authorDE VICENTE, P.
dc.contributor.authorASVANY, O.
dc.date.issued2023-07-25
dc.identifier.issn0004-6361
dc.description.abstractEnBased on a novel laboratory method, 14 millimeter-wave lines of the molecular ion H 2 CCCH + have been measured in high resolution, and the spectroscopic constants of this asymmetric rotor determined with high accuracy. Using the Yebes 40 m and IRAM 30 m radio telescopes, we detected four lines of H 2 CCCH + toward the cold dense core TMC-1. With a dipole moment of about 0.55 D obtained from high-level ab initio calculations, we derive a column density of 5.4±1×10 11 cm −2 and 1.6±0.5×10 11 cm −2 for the ortho and para species, respectively, and an abundance ratio N(H 2 CCC)/N(H 2 CCCH + ) = 2.8±0.7. The chemistry of H 2 CCCH + is modeled using the most recent chemical network for the reactions involving the formation of H 2 CCCH + . We find a reasonable agreement between model predictions and observations, and new insights into the chemistry of C 3 -bearing species in TMC-1 were obtained.
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enDiscovery of H 2 CCCH + in TMC-1
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202347174
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
dc.identifier.arxiv2307.01733
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageL1
bordeaux.volume676
bordeaux.peerReviewedoui
hal.identifierhal-04292056
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04292056v1
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