PMO OpenIR  > 紫金山天文台青海观测站
High-velocity gas associated ultracompact HII regions
Xu, Y; Jiang, DR; Yang, CY; Zheng, XW; Gu, MF; Pei, CC
2002-07-01
Source PublicationSCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY
Volume45Issue:7Pages:937-945
AbstractWe present the results of a survey for high-velocity (CO)-C-12 (1-0) emission associated H2O masers and ultracompact (UC) Hll regions. The aim is to investigate the relationship between H2O masers, CO high-velocity gas (HVG) and their associated infrared sources. Our sample satisfies Wood & Churchwell criterion. Almost 70% of the sources have full widths (FWs) greater than 15 km . s(-1) at T-a = 100 mK and 15% have FWs greater than 30 km . s(-1). In most of our objects there is excess high velocity emission in the beam. There is a clear correlation between CO line FWs and far-infrared luminosities: the FW increases with the FIR luminosity. The relation suggests that more luminous sources are likely to be more energetic and able to inject more energy into their surroundings. As a result, larger FW of the CO line could be produced. In most of our sources, the velocities of peak of the H2O emission are in agreement with those of the CO cloud, but a number of them have a large blueshift with respect to the CO peak. These masers might stem from the amplifications of a background source, which may amplify some unobservable weak masers to an observable level.
KeywordHii Regions Ism : Jets And Outflows Stars : Formation Masers
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordH2O MASER SOURCES ; H-II-REGIONS ; IRAS SOURCES ; WATER MASERS ; SOLAR CIRCLE ; MOLECULAR OUTFLOWS ; STAR-FORMATION ; MASSIVE STARS ; EMISSION ; CLOUD
Indexed BySCI
Language英语
WOS Research AreaMathematics
WOS SubjectMathematics, Applied ; Mathematics
WOS IDWOS:000176851400014
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7797
Collection紫金山天文台青海观测站
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Columbia Univ, Dept Astron, New York, NY 10027 USA
4.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
5.Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Xu, Y,Jiang, DR,Yang, CY,et al. High-velocity gas associated ultracompact HII regions[J]. SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,2002,45(7):937-945.
APA Xu, Y,Jiang, DR,Yang, CY,Zheng, XW,Gu, MF,&Pei, CC.(2002).High-velocity gas associated ultracompact HII regions.SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,45(7),937-945.
MLA Xu, Y,et al."High-velocity gas associated ultracompact HII regions".SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY 45.7(2002):937-945.
Files in This Item:
File Name/Size DocType Version Access License
2002041High-velocity(85KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu, Y]'s Articles
[Jiang, DR]'s Articles
[Yang, CY]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu, Y]'s Articles
[Jiang, DR]'s Articles
[Yang, CY]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu, Y]'s Articles
[Jiang, DR]'s Articles
[Yang, CY]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2002041High-velocity gas associated ultracompact HII regions.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.