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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
AbstractWe 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.
KeywordIsm : Jets And Outflows Radio Lines : Ism Stars : Formation
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000176339700010
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Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
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.
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