Near infrared observations of the star formation region GGD12-15

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 observations of the star formation region GGD12-15
	Fang, M; Yao, YQ
刊名	CHINESE ASTRONOMY AND ASTROPHYSICS
	2004-07-01
卷号	28 期号:3 页码:308-322
关键词	infrared : stars galaxy : open clusters and associations : GGD12-15-stars : formation
ISSN号	0275-1062
英文摘要	Near infrared imaging observations in JHK broad bands and H-2 nu=1-0 S(I) narrow band of the star formation region GGD12-15 are presented in this article. The images reveal young compact infrared clusters and infrared nebulae in association with infrared sources, as well as outflow activities characterized by H-2 emission knots. Most of the infrared point sources are invisible in the optical wave band. The JHK' photometric results of 76 infrared point sources contain 32 with infrared excess, and 5 with the characteristics of protostars, indicating very active star formation activities in the molecular clouds. Massive stars (defined as those with spectral types earlier than 138) account for similar to 10 - 26 per cent of all stars of the clusters. The K' magnitude distribution of GGD12-15 peaks at 15.0 mag, and spreads broadly from 13.0 mag to 16.0 mag. The peak of the [H-K'] color distribution occurs at similar to0.7 mag, above which the redder components of the cluster make up 70 per cent of the total. The newly-discovered H-2 emission knots are concentrated in the central area. of the clusters, and the spatial distribution has obvious relation to violent star formation activities. Five of the emission knots are located in the central part of the molecular outflow, indicating that they may have been excited by the same source as the molecular outflow.
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]	H-II REGIONS ; MOLECULAR OUTFLOWS ; INTRINSIC COLORS ; RADIO-SOURCES ; YOUNG STARS ; GGD 12-15 ; MASS ; PHOTOMETRY ; OBJECTS ; CLUSTER
收录类别	SCI
语种	英语
WOS记录号	WOS:000223946500007
公开日期	2012-12-22
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/7703]
专题	紫金山天文台_分子云与恒星形成研究团组
作者单位	Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Fang, M,Yao, YQ. Near infrared observations of the star formation region GGD12-15[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2004,28(3):308-322.
APA	Fang, M,&Yao, YQ.(2004).Near infrared observations of the star formation region GGD12-15.CHINESE ASTRONOMY AND ASTROPHYSICS,28(3),308-322.
MLA	Fang, M,et al."Near infrared observations of the star formation region GGD12-15".CHINESE ASTRONOMY AND ASTROPHYSICS 28.3(2004):308-322.