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Title

Discovery of the first Ca-bearing molecule in space: CaNC

AuthorsCernicharo, José ; Velilla Prieto, L. ; Agúndez, Marcelino ; Pardo Carrión, Juan Ramón ; Fonfría, José Pablo ; Quintana-Lacaci, G. ; Cabezas, Carlos; Bermúdez, Celina; Guélin, M.
KeywordsMolecular data
Line: identification
Stars: carbon
Circumstellar matter
Stars: individual: IRC+10216
Astrochemistry
Issue Date3-Jul-2019
PublisherSpringer
CitationAstronomy and Astrophysics 627: L4 (2019)
AbstractWe report on the detection of calcium isocyanide, CaNC, in the carbon-rich evolved star IRC+10216. We derived a column density for this species of (2 ± 0.5) × 1011 cm−2 . Based on the observed line profiles and the modelling of its emission through the envelope, the molecule has to be produced in the intermediate and outer layers of the circumstellar envelope where other metal-isocyanides have previously been found in this source. The abundance ratio of CaNC relative to MgNC and FeCN is '1/60 and '1, respectively. We searched for the species CaF, CaCl, CaC, CaCCH, and CaCH3 for which accurate frequency predictions are available. Only upper limits have been obtained for these molecules.
Description5 pags., 2 figs.
Publisher version (URL)http://dx.doi.org/10.1051/0004-6361/201936040
URIhttp://hdl.handle.net/10261/202761
Identifiersdoi: 10.1051/0004-6361/201936040
issn: 1432-0746
Appears in Collections:(CFMAC-IFF) Artículos
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