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

被引：2
|
作者：
Minh, Younk Chol [1 ]
Kim, Kee-Tae [1 ]
Yan, Chi-Hung [2 ,3 ]
Park, Yong-Sun [4 ]
Lee, Seokho [4 ,5 ]
Lal, Dharam Vil [6 ]
Hasegawa, Tatsuhiko [2 ]
Zhang, X. Z. [7 ]
Kuan, Yi-Jeng [3 ]
机构：
[1] Korea Astron & Space Sci Inst, Taejon 305348, South Korea
[2] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan
[3] Natl Taiwan Normal Univ, Dept Earth Sci, Taipei 10617, Taiwan
[4] Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul 151747, South Korea
[5] Kyung Hee Univ, Dept Astron & Space Sci, Yongin 446701, Kyungki Do, South Korea
[6] Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India
[7] Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China
来源：
JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY | 2014年 / 47卷 / 05期
关键词：
ISM: abundances; ISM: molecules; ISM: HII regions; individual: Sh 2-104; MASSIVE-STAR FORMATION; HII-REGIONS; RADIO-CONTINUUM; CARBON-MONOXIDE; EXCITING STARS; EMISSION; CN; CHEMISTRY; CLOUDS;
D O I：
10.5303/JKAS.2014.47.5.179
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：179 / 185
页数：7
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