2019A&A...627L...4C

Query : 2019A&A...627L...4C

2019A&A...627L...4C - Astronomy and Astrophysics, volume 627, L4-4 (2019/7-1)

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

CERNICHARO J., VELILLA-PRIETO L., AGUNDEZ M., PARDO J.R., FONFRIA J.P., QUINTANA-LACACI G., CABEZAS C., BERMUDEZ C. and GUELIN M.

Abstract (from CDS):

We 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)x10¹¹cm^–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.

Abstract Copyright: © ESO 2019

Journal keyword(s): molecular data - line: identification - stars: carbon - circumstellar matter - stars: individual: IRC+10216 - astrochemistry

Simbad objects: 2

Full paper

View the references in ADS

Number of rows : 2

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	IRC +10216	C*	09 47 57.40632	+13 16 43.5648						C9,5e	2282	0
2	V* V1610 Cyg	pA*	21 02 18.27	+36 41 37.0						F5Iae	863	1

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