• Title/Summary/Keyword: individual: Sh 2-104

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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;Kim, Kee-Tae;Yan, Chi-Hung;Park, Yong-Sun;Lee, Seokho;Lal, Dharam Vil;Hasegawa, Tatsuhiko;Zhang, X.Z.;Kuan, Yi-Jeng
    • Journal of The Korean Astronomical Society
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    • v.47 no.5
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    • pp.179-185
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    • 2014
  • 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.