中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Massive molecular cloud cores and activities of star formation

文献类型:期刊论文

作者Zhou, WF; Wu, YF; Yue, W; Bing-Gang, J
刊名CHINESE PHYSICS
出版日期2005-04-01
卷号14期号:4页码:863-868
关键词interstellar matter molecular cloud star formation
ISSN号1009-1963
英文摘要We have mapped 23 sources in the J=1-0 lines of (CO)-C-12, (CO)-C-13 and (CO)-O-18 with the 13.7-m telescope at Qinghai station of Purple Mountain Observatory. The samples were chosen from the massive star formation regions whose single point lines have the broad-wing profile. The mapping shows that 12 clouds have cores and 5 outflows were identified with the 12CO J=1-0 lines. Among the 12 cores, systematic velocity shifts were found in 2 cores, and blue asymmetric double-peak profile of 12CO line was found in IRAS 19529+2704, indicating that it may be an infall candidate. Physical parameters of the cores and outflows were derived from the local thermodynamic equilibrium assumption. The masses range from similar to 9.4 x 10(2) M-circle dot to similar to 2.2 x 10(5) M-circle dot. The hydrogen molecule densities range from similar to 3.4 x 10(2) cm(-3) to similar to 1.2 x 10(4) cm(-3). The molecular outflows have masses larger than 3.5M(circle dot), and kinetic energies greater than 0.9 X 10(38)J. The outflows have significantly greater masses and kinetic energies than those from low-mass young stellar objects (YSOs). For the cores, 2MASS data are available, dozens of 2MASS sources with different colour indices and brightness are often found around IRAS source, among which the reddest 2MASS source is always within the IRAS error ellipse thus probably corresponds to the IRAS source.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Physics, Multidisciplinary
研究领域[WOS]Physics
关键词[WOS]YOUNG STELLAR OBJECTS ; H2O MASER SOURCES ; CO OBSERVATIONS ; DENSE CORES ; LINE FORMATION ; SEARCH ; REGIONS ; OUTFLOWS ; GALAXY ; WINDS
收录类别SCI
语种英语
WOS记录号WOS:000228148900040
公开日期2012-03-07
源URL[http://159.226.72.40/handle/332002/4040]  
专题紫金山天文台_期刊(老文献)
作者单位1.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
2.Purple Mt Observ, Qinghai Stn, De Ling Ha 817000, Peoples R China
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Zhou, WF,Wu, YF,Yue, W,et al. Massive molecular cloud cores and activities of star formation[J]. CHINESE PHYSICS,2005,14(4):863-868.
APA Zhou, WF,Wu, YF,Yue, W,&Bing-Gang, J.(2005).Massive molecular cloud cores and activities of star formation.CHINESE PHYSICS,14(4),863-868.
MLA Zhou, WF,et al."Massive molecular cloud cores and activities of star formation".CHINESE PHYSICS 14.4(2005):863-868.

入库方式: OAI收割

来源:紫金山天文台

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