Discovery of the first Ca-bearing molecule in space: CaNC
Artikel i vetenskaplig tidskrift, 2019

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) x 10(11) 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 congruent to 1/60 and congruent to 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.

stars: individual: IRC+10216

line: identification

molecular data

astrochemistry

stars: carbon

circumstellar matter

Författare

J. Cernicharo

Consejo Superior de Investigaciones Científicas (CSIC)

Luis Velilla Prieto

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

M. Agundez

Consejo Superior de Investigaciones Científicas (CSIC)

J. R. Pardo

Consejo Superior de Investigaciones Científicas (CSIC)

J. P. Fonfria

Consejo Superior de Investigaciones Científicas (CSIC)

G. Quintana-Lacaci

Consejo Superior de Investigaciones Científicas (CSIC)

C. Cabezas

Consejo Superior de Investigaciones Científicas (CSIC)

C. Bermudez

Consejo Superior de Investigaciones Científicas (CSIC)

M. Guelin

Institut de RadioAstronomie Millimetrique (IRAM)

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 627 L4

Ämneskategorier

Meteorologi och atmosfärforskning

Astronomi, astrofysik och kosmologi

Ekologi

DOI

10.1051/0004-6361/201936040

Mer information

Senast uppdaterat

2019-11-27