Volume 606, October 2017
|Number of page(s)||10|
|Section||Interstellar and circumstellar matter|
|Published online||13 October 2017|
A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz⋆
1 CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, PR China
e-mail: email@example.com; firstname.lastname@example.org
2 School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, PR China
3 Department of Radio Science and Technology, Shanghai Astronomical observatory, 80 Nandan RD, Shanghai 200030, PR China
4 Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, PR China
5 Center for Astrophysics, Guangzhou University, Guangzhou 510006, PR China
Received: 16 March 2017
Accepted: 17 August 2017
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.
Key words: stars: individual: IRC +10216 / radio lines: stars / line: identification
The reduced spectrum as a FITS file is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (22.214.171.124) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/606/A74
© ESO, 2017
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