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  Carbon-chain molecules in molecular outflows and Lupus I region – new producing region and new forming mechanism

Wu, Y., Liu, X., Chen, X., Lin, L., Yuan, J., Zhang, C., et al. (2019). Carbon-chain molecules in molecular outflows and Lupus I region – new producing region and new forming mechanism. Monthly Notices of the Royal Astronomical Society, 488(1), 495-511. doi:10.1093/mnras/stz1498.

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Wu, Yuefang, Author
Liu, Xunchuan, Author
Chen, Xi, Author
Lin, Lianghao, Author
Yuan, Jinghua, Author
Zhang, Chao, Author
Liu, Tie, Author
Shen, Zhiqiang, Author
Li, Juan, Author
Wang, Junzhi, Author
Qin, Sheng-Li, Author
Kim, Kee-Tae, Author
Liu, Hongli, Author
Zhu, Lei, Author
Madones, Diego1, Author              
Inostroza, Natalia, Author
Henkel, Christian, Author
Zhang, Tianwei, Author
Li, Di, Author
Esimbek, Jarken, Author
Liu, Qinghui, Author more..
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1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: Using the new equipment of the Shanghai Tian Ma Radio Telescope, we have searched for carbon-chain molecules (CCMs) towards five outflow sources and six Lupus I starless dust cores, including one region known to be characterized by warm carbon-chain chemistry (WCCC), Lupus I-1 (IRAS 15398-3359), and one TMC-1 like cloud, Lupus I-6 (Lupus-1A). Lines of HC3N J = 2 − 1, HC5N J = 6 − 5, HC7N J = 14 − 13, 15 − 14, 16 − 15, and C3S J = 3 − 2 were detected in all the targets except in the outflow source L1660 and the starless dust core Lupus I-3/4. The column densities of nitrogen-bearing species range from 1012 to 1014 cm−2 and those of C3S are about 1012 cm−2. Two outflow sources, I20582+7724 and L1221, could be identified as new carbon-chain-producing regions. Four of the Lupus I dust cores are newly identified as early quiescent and dark carbon-chain-producing regions similar to Lup I-6, which together with the WCCC source, Lup I-1, indicate that carbon-chain-producing regions are popular in Lupus I which can be regard as a Taurus-like molecular cloud complex in our Galaxy. The column densities of C3S are larger than those of HC7N in the three outflow sources I20582, L1221, and L1251A. Shocked carbon-chain chemistry is proposed to explain the abnormal high abundances of C3S compared with those of nitrogen-bearing CCMs. Gas-grain chemical models support the idea that shocks can fuel the environment of those sources with enough S+ thus driving the generation of S-bearing CCMs.

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 Dates: 2019-06-25
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stz1498
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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 488 (1) Sequence Number: - Start / End Page: 495 - 511 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150