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http://dx.doi.org/10.5303/JKAS.2014.47.5.179

PROPERTIES OF THE MOLECULAR CLUMP AND THE ASSOCIATED ULTRACOMPACT H II REGION IN THE GAS SHELL OF THE EXPANDING H II REGION SH 2-104  

Minh, Young Chol (Korea Astronomy and Space Science Institute)
Kim, Kee-Tae (Korea Astronomy and Space Science Institute)
Yan, Chi-Hung (Academia Sinica Institute of Astronomy and Astrophysics)
Park, Yong-Sun (Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Lee, Seokho (Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Lal, Dharam Vil (National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune University Campus)
Hasegawa, Tatsuhiko (Academia Sinica Institute of Astronomy and Astrophysics)
Zhang, X.Z. (National Astronomical Observatories of China, Chinese Academy of Sciences)
Kuan, Yi-Jeng (Department of Earth Sciences, National Taiwan Normal University)
Publication Information
Journal of The Korean Astronomical Society / v.47, no.5, 2014 , pp. 179-185 More about this Journal
Abstract
We study the physical and chemical properties of the molecular clump hosting a young stellar cluster, IRAS 20160+3636, which is believed to have formed via the "collect and collapse" process. Physical parameters of the UC H II region associated with the embedded cluster are measured from the radio continuum observations. This source is found to be a typical Galactic UC H II region, with a B0.5 type exciting star, if it is ionized by a single star. We derive a CN/HCN abundance ratio larger than 1 over this region, which may suggest that this clump is being affected by the UV radiation from the H II region.
Keywords
ISM: abundances; ISM: molecules; ISM: HII regions; individual: Sh 2-104;
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