Molecular line study of massive star-forming regions from the Red MSX Source survey

	Molecular line study of massive star-forming regions from the Red MSX Source survey
	Yu, Naiping1,2,3 ; Wang, Jun-Jie1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-05-01
卷号	440 期号:2 页码:1213-1224
关键词	stars: formation stars: massive stars: protostars ISM: jets and outflows ISM: molecules ISM: structure
英文摘要	In this paper, we have selected a sample of massive star-forming regions from the Red MSX Source survey, in order to study star formation activities (mainly outflow and inflow signatures). We have focused on three molecular lines from the Millimeter Astronomy Legacy Team Survey at 90 GHz: HCO+(1-0), (HCO+)-C-13(1-0) and SiO(2-1). According to previous observations, our sources can be divided into two groups: nine massive young stellar object candidates (radio-quiet) and 10 H ii regions (which have spherical or unresolved radio emissions). Outflow activities have been found in 11 sources, while only three show inflow signatures in all. The high outflow detection rate means that outflows are common in massive star-forming regions. The inflow detection rate was relatively low. We suggest that this was because of the beam dilution of the telescope. All three inflow candidates have outflow(s). The outward radiation and thermal pressure from the central massive star(s) do not seem to be strong enough to halt accretion in G345.0034-00.2240. Our simple model of G318.9480-00.1969 shows that it has an infall velocity of about 1.8 km s(-1). The spectral energy distribution analysis agrees our sources are massive and intermediate-massive star formation regions.
收录类别	SCI
语种	英语
WOS记录号	WOS:000334742200021
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6354]
专题	国家天文台_射电天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.NAOC TU Joint Ctr Astrophys, Lhasa 850000, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Yu, Naiping,Wang, Jun-Jie. Molecular line study of massive star-forming regions from the Red MSX Source survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,440(2):1213-1224.
APA	Yu, Naiping,&Wang, Jun-Jie.(2014).Molecular line study of massive star-forming regions from the Red MSX Source survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,440(2),1213-1224.
MLA	Yu, Naiping,et al."Molecular line study of massive star-forming regions from the Red MSX Source survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 440.2(2014):1213-1224.