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

页码：179 / 185

页数：7