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题名: Current Investigations on Young Star Cluster NGC 3603 in X-ray
作者: Wang Qian; Sun Wei; Ji Li
刊名: Progress in Astronomy
出版日期: 2017
卷号: 35, 期号:1, 页码:1-15
英文摘要: NGC 3603 is a dense young cluster located in the Carina spiral arm of the Milky Way. The mechanical energy released by the winds from massive stars alters the property of the ambient medium, and has very important influences on the star formation and the galaxy evolution process. The X-ray emission in massive star formation region is produced by the pre-main sequence star, OB star, and diffuse hot gas etc. In this paper, we reviewed the X-ray radiation mechanisms of those three kinds of sources and presented the X-ray radiation of point sources and diffuse hot gas in NGC 3603, respectively. For the point sources, Moffat et al.(2002)detected the X-rays from 43 early-type sources, and found that they follow the canonical relationship between the X-ray luminosity and the bolometric luminosity: L_X/L_(bol) ~ 10~(-7). They also found that MTT 68 and MTT 71, two O stars far away from the core region, have enhanced X-ray emission: L_X/L_(bol) ~ 10-5. For the diffuse emission, Townsley et al.(2011)found that the diffuse plasma in NGC 3603 is in nonequilibrium state. Ji et al.(2006)fitted the diffuse X-rays in the central annulus region with the 1-D self-consistent non-equilibrium ionization cluster wind model, and determined related stellar wind parameters. Besides that, they both found that the X-rays from un-resolved pre-main sequence stars contribute ~ 10% in total X-ray luminosity. The prospect of X-ray research on NGC 3603 based on the archival 0.5 Ms Chandra observation is also discussed in the end.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17465
Appears in Collections:中国科学院紫金山天文台研究生部_学生文章

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