Discovery of the first Ca-bearing molecule in space: CaNC
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) × 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...
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Published in | Astronomy and astrophysics (Berlin) Vol. 627; p. L4 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Germany
EDP Sciences
01.07.2019
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Subjects | |
Online Access | Get full text |
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Summary: | 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) × 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. |
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Bibliography: | publisher-ID:aa36040-19 dkey:10.1051/0004-6361/201936040 e-mail: jose.cernicharo@csic.es ark:/67375/80W-KT34RXD2-R istex:FF1D34DE98070839CEC38A3FB9DFFEC977437319 href:https://www.aanda.org/articles/aa/abs/2019/07/aa36040-19/aa36040-19.html bibcode:2019A%26A...627L...4C This work was based on observations carried out with the IRAM 30 m telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0004-6361 1432-0746 1432-0746 |
DOI: | 10.1051/0004-6361/201936040 |