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Detection of extragalactic CF+ toward PKS 1830-211 Chemical differentiation in the absorbing gas

Sebastien Muller (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; K. Kawaguchi ; John H. Black (Institutionen för rymd- och geovetenskap) ; T. Amano
Astronomy and Astrophysics (0004-6361). Vol. 589 (2016), p. Art. no. L5.
[Artikel, refereegranskad vetenskaplig]

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 similar to 3 x 10(-10) relative to H-2 and that similar to 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 [CI]. Our results are consistent with expected fluorine chemistry and point to chemical differentiation in the column of absorbing gas.

Nyckelord: quasars: absorption lines, quasars: individual: PKS1830-211, galaxies: ISM, galaxies: abundances, ISM: molecules; radio lines: galaxies



Denna post skapades 2016-07-04. Senast ändrad 2016-07-11.
CPL Pubid: 238854

 

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