Water abundance in four of the brightest water sources in the southern sky

	Water abundance in four of the brightest water sources in the southern sky
	Wang, Bing-Ru 1; Qian, Lei 1; Li, Di1,2 ; Pan, Zhi-Chen 1
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2016-03-01
卷号	16 期号:3
关键词	ISM: abundances (ISM:) HII regions ISM: molecules stars: formation
英文摘要	We estimated the ortho-H2O abundances of G267.9-1.1, G268.4-0.9, G333.1-0.4 and G336.5-1.5. four of the brightest ortho-H2O sources in the southern sky observed by the Submillimeter Wave Astronomy Satellite (ortho-H2O 1(10) - 1(01) line, 556.936 GHz). The typical molecular clumps in our sample have H-2 column densities of 10(22) to 10(23) cm(2) and onlio-H2O abundances of 10(-10). Compared with previous studies, the ortho-H2O abundances are at a low level, which can be caused by the low temperatures of these clumps. To estimate the ortho-H2O abundances, we used the CS J = 2 -> 1 line (97.98095 GHz) and CS J = 5 -> 4 (244.93556 GHz) line observed by the Swedish-ESO 15 m Submillimeter Telescope (SEST) to calculate the temperatures of the clumps and the 350 mu m dust continuum observed by the Caltech Submillimeter Observatory (CSO) telescope to estimate the H-2 column densities. The observations of N2H+ (J = 1 -> 0) for these clumps were also acquired by SEST and the corresponding abundances were estimated. The N2H+ abundance in each clump shows a common decreasing trend toward the center and a typical abundance range from 10(-11) to 10(-9).
收录类别	SCI
语种	英语
WOS记录号	WOS:000371883400003
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5399]
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.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Bing-Ru,Qian, Lei,Li, Di,et al. Water abundance in four of the brightest water sources in the southern sky[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(3).
APA	Wang, Bing-Ru,Qian, Lei,Li, Di,&Pan, Zhi-Chen.(2016).Water abundance in four of the brightest water sources in the southern sky.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(3).
MLA	Wang, Bing-Ru,et al."Water abundance in four of the brightest water sources in the southern sky".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.3(2016).