2017/08/21 by Xiaoyan Zhang, Xiao-Yan Zhang, Qingfeng Zhu +7 · 1 citation
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Asymptotic giant branch #Atmospheric Ozone and Climate #Carbon fibers #Carbon star #Excitation #Homogeneous #Line (geometry) #Materials science #Molecular Spectroscopy and Structure #Molecule #Physics #Radio telescope #Spectral line #Stars #Thermodynamics #astro-ph.GA #astro-ph.SR
paper · pdf · doi:10.1051/0004-6361/201730791
published as A&A, 606, A74 (2017) · This is the authors' version of the manuscript; 16 pages, 5 figures, 6 tables; Accepted for publication in A&A 8/17/2017
openalex publication_date 2017/08/21 · arxiv created 2017/12/06 · arxiv updated 2017/12/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.