Near-infrared imaging of the star forming region S87

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 分子云与恒星形成研究团组

	Near-infrared imaging of the star forming region S87
	Chen, YX ; Zheng, XW ; Yao, YQ ; Yang, J; Sato, S
刊名	ASTRONOMY & ASTROPHYSICS
	2003-04-01
卷号	401 期号:1 页码:185-192
关键词	infrared : stars ISM : individual : S87 ISM : reflection nebulae stars : formation
ISSN号	0004-6361
英文摘要	Near-infrared images of the star forming region S87 in the JHK broad-band filters and H-2 v = 1-0 S(1) narrow-band filter are presented. In the eastern part of the region, the S87E nebula shows a quite complex structure. In the optically thin southern part of the nebula, there is an elongated cavity in the direction aligned with the blue-shifted molecular outflow. A subcluster of twelve young near-infrared sources has been detected in the optically thick northern part of the nebula, where a cone-shaped opaque patch is seen. In the 90" x 90" region around S87E, we detected I I I sources with m(K), > 15.2 mag. From analysis of the JHK' colors of the stars inside S87E, we find that after adjusting for background contamination, more than 40% of all the sources associated with the cluster display infrared excesses. This high fraction of infrared excess sources, along with the evidence of molecular outflow activity near the cluster, suggests that the S87E cluster is very young(similar to3-4 x 10(6) yr). We construct the differential K' luminosity function for S87E and find the overall shape and structure are somewhat different to that of other young clusters. Besides a common turnover at 14 mag, there is a prominent peak and still more cluster members with luminosities fainter than 14th magnitude at K' band. Five H-2 regions were also discovered and three of them are associated with the S87E nebula.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	YOUNG STELLAR OBJECTS ; CLUSTERS ; GAS
收录类别	SCI
语种	英语
WOS记录号	WOS:000181611800015
公开日期	2012-08-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/4581]
专题	紫金山天文台_分子云与恒星形成研究团组
作者单位	1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Nagoya Univ, Sch Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 46401, Japan
推荐引用方式 GB/T 7714	Chen, YX,Zheng, XW,Yao, YQ,et al. Near-infrared imaging of the star forming region S87[J]. ASTRONOMY & ASTROPHYSICS,2003,401(1):185-192.
APA	Chen, YX,Zheng, XW,Yao, YQ,Yang, J,&Sato, S.(2003).Near-infrared imaging of the star forming region S87.ASTRONOMY & ASTROPHYSICS,401(1),185-192.
MLA	Chen, YX,et al."Near-infrared imaging of the star forming region S87".ASTRONOMY & ASTROPHYSICS 401.1(2003):185-192.