文章基本信息

标题：A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz
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作者：Xiao-Yan Zhang ; Xiao-Yan Zhang ; Qing-Feng Zhu 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2017
卷号：606
页码：1-10
DOI：10.1051/0004-6361/201730791
语种：English
出版社：EDP Sciences
摘要：A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz was carried out using the Shanghai Tian Ma 65 m Radio Telescope (TMRT-65 m) with a sensitivity of <7 mK. Thirty-five spectral lines of 12 different molecules and radicals were detected in total. Except for SiS, the detected molecules are all carbon-chain molecules, including HC3N, HC5N, HC7N, HC9N, C6H, C6H−, C8H, SiC2, SiC4, c-C3H2, and l-C5H. The presence of rich carbon-bearing molecules is consistent with the identity of IRC +10216 as a carbon-rich asymptotic giant branch (AGB) star. The excitation temperatures and column densities of the observed species are derived by assuming a local thermodynamic equilibrium and homogeneous conditions.
关键词：enstars: individual: IRC +10216radio lines: starsline: identification