文章基本信息

标题：Detection of extragalactic CF+ toward PKS 1830−211 - Chemical differentiation in the absorbing gas
其他标题：Chemical differentiation in the absorbing gas
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作者：S. Muller ; S. Muller ; K. Kawaguchi 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2016
卷号：589
页码：1-5
DOI：10.1051/0004-6361/201628494
语种：English
出版社：EDP Sciences
摘要：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.
关键词：quasars: absorption lines;quasars: individual: PKS1830-211;galaxies: ISM;galaxies: abundances;ISM: molecules;radio lines: galaxies