A large-scale molecular line survey for cold IRAS sources in the galaxy. I. The CO (J=1-0) data

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

	A large-scale molecular line survey for cold IRAS sources in the galaxy. I. The CO (J=1-0) data
	Yang, J; Jiang, ZB; Wang, M; Ju, BG ; Wang, HC
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2002-07-01
卷号	141 期号:1 页码:157-185
关键词	ISM : jets and outflows radio lines : ISM stars : formation
ISSN号	0067-0049
英文摘要	We conducted a large-scale survey for the cold infrared sources along the northern Galactic plane in the CO (J = 1-0) line. There are 1912 IRAS sources selected on the basis of their color indices over the 12, 25, and 60 l m wave bands and their association with regions of recent star formation. A quick single-point survey was made toward all of the sources, which results in a detection of 1331 sources with significant CO emission above the detection limit of 0.7 K, inferring a CO detection rate of 70%. Located over a wide range of the Galactocentric distances, the CO sources show high concentration toward the spiral arms. Among the detected sources, there are 351 sources found to have high-velocity CO wing emission. A search for the latest catalog of high-velocity CO flows (HVFs) from young stellar objects indicates that 289 sources are beyond the present lists of HVFs. These high-velocity wing sources provide us with a comprehensive database for the study of HVFs from young stellar objects. Using the known outflow sources as an effective indicator, we found that the detection rate for high-velocity wings during the quick survey is 62%, moderately sensitive in searching for new outflow sources. The CO detection rate of the IRAS sources, combined with the ratio of high-velocity wing, suggests that 41% of the CO sources are undergoing the HVF phase. In this paper, the CO spectra are presented along with the preliminary statistics of the data.
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 ; 1ST GALACTIC QUADRANT ; INFRARED SOURCES ; OUTFLOWS ; EVOLUTION ; CLOUDS
收录类别	SCI
语种	英语
WOS记录号	WOS:000176339700010
公开日期	2013-01-29
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/7802]
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.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Yang, J,Jiang, ZB,Wang, M,et al. A large-scale molecular line survey for cold IRAS sources in the galaxy. I. The CO (J=1-0) data[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2002,141(1):157-185.
APA	Yang, J,Jiang, ZB,Wang, M,Ju, BG,&Wang, HC.(2002).A large-scale molecular line survey for cold IRAS sources in the galaxy. I. The CO (J=1-0) data.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,141(1),157-185.
MLA	Yang, J,et al."A large-scale molecular line survey for cold IRAS sources in the galaxy. I. The CO (J=1-0) data".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 141.1(2002):157-185.