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题名: Dense molecular gas tracers in high mass star formation regions
作者: Ma HongJun(马红君)1; Gao Yu(高煜)1; Wu, Jing-Wen2, 3
刊名: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期: 2016-02-01
卷号: 16, 期号:2
关键词: ISM: clouds ; ISM: molecules ; stars: formation
DOI: 10.1088/1674-4527/16/2/025
文章类型: Article
英文摘要: We report the FCRAO observations that mapped HCN (1-0), CS (2-1), HNC (1-0) and HCO+ (1-0) in ten high-mass star forming cores associated with water masers. We present velocity integrated intensity maps of the four lines for these dense cores, compare their line profiles, and derive physical properties of these cores. We find that these four tracers identify areas with similar properties in these massive dense cores, and in most cases, the emissions of HCN and HCO+ are stronger than those of HNC and CS. We also use the line ratios of HCO+/HCN, HNC/HCN and HNC/HCO+ as the diagnostics to explore the environment of these high-mass star forming regions, and find that most of the cores agree with the model that photodominated regions dominate the radiation field, except for W44, for which the radiation field is similar to an X-ray dominated region.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SUPERNOVA REMNANT W44 ; INFRARED GALAXIES ; FORMING REGIONS ; HCO+ EMISSION ; WATER MASERS ; AB-INITIO ; HCN ; CLUSTERS ; CLOUDS ; CLUMPS
收录类别: SCI
项目资助者: National Natural Science Foundation of China(11390373)
语种: 英语
WOS记录号: WOS:000369252500005
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16125
Appears in Collections:卫星精密定轨及应用研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Radio Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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