Volume 589, May 2016
|Number of page(s)||5|
|Published online||18 April 2016|
Detection of extragalactic CF+ toward PKS 1830−211
Chemical differentiation in the absorbing gas
1 Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 43992 Onsala, Sweden
2 Department of Chemistry, Okayama University, Tsushima-naka 3-1-1, Kitaku, 700-8530 Okayama, Japan
3 Department of Chemistry and Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Received: 11 March 2016
Accepted: 1 April 2016
We report the first extragalactic detection of the fluoromethylidynium ion CF+ in the z = 0.89 absorber toward PKS 1830−211. We estimate an abundance of ~3 × 10-10 relative to H2 and that ~1% of fluorine is captured in CF+. The absorption line profile of CF+ is found to be markedly different from that of other species observed within the same tuning, and is notably anticorrelated with CH3OH. On the other hand, the CF+ profile resembles that of [C I]. Our results are consistent with expected fluorine chemistry and point to chemical differentiation in the column of absorbing gas.
Key words: quasars: absorption lines / quasars: individual: PKS1830-211 / galaxies: ISM / galaxies: abundances / ISM: molecules / radio lines: galaxies
© ESO, 2016
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