CO observations of the Galactic bubble N4

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

	CO observations of the Galactic bubble N4
	Li, Jun-Yu 1,2; Jiang, Zhi-Bo1 ; Liu, Yao1 ; Wang, Yuan1
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2013-08-01
卷号	13 期号:8 页码:921-934
关键词	ISM: bubbles ISM: clouds molecules stars: formation
ISSN号	1674-4527
通讯作者	Li, JY (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China. Email: lijunyu@pmo.ac.cn
英文摘要	We present a study of the Galactic bubble N4 using the 13.7 m millimeter-wave telescope, which is managed by Purple Mountain Observatory at Qinghai Station. N4 is one of the science demonstration regions where simultaneous observations of (CO)-C-12 (J = 1 - 0), (CO)-C-13 (J = 1 - 0) and (CO)-O-18 (J = 1 - 0) line emission towards N4 were carried out under the project Milky Way Imaging Scroll Painting (MWISP). We analyze the spectral profile and the distribution of the molecular gas. Morphologically, the CO emissions correlate well with Spitzer IRAC 8.0 mu m emission. The channel map and velocity-position diagram show that N4 is more likely to be an inclined expanding ring rather than a spherical bubble. We calculated the physical parameters of N4 including mass, size, column density and optical depth. Some massive star candidates were discovered in the region of N4 using the (J, J - H) color-magnitude diagram. We found a candidate for the energy source driving the expansion of N4, a massive star with a mass of similar to 15 M-circle dot and an age of similar to 1 Myr. There is the signature of infall motion in N4, which can be a good candidate for the infall area. Combining millimeter and infrared data, we suggest that triggered star formation can exist in N4.
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]	HII-REGIONS ; DUST ; ACCRETION ; 2MASS ; CLOUD
收录类别	SCI
语种	英语
WOS记录号	WOS:000323688500004
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9843]
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.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Jun-Yu,Jiang, Zhi-Bo,Liu, Yao,et al. CO observations of the Galactic bubble N4[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(8):921-934.
APA	Li, Jun-Yu,Jiang, Zhi-Bo,Liu, Yao,&Wang, Yuan.(2013).CO observations of the Galactic bubble N4.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(8),921-934.
MLA	Li, Jun-Yu,et al."CO observations of the Galactic bubble N4".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.8(2013):921-934.