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A SEARCH FOR 95 GHz CLASS I METHANOL MASERS IN MOLECULAR OUTFLOWS
Gan, Cong-Gui1,2,3; Chen, Xi1,2; Shen, Zhi-Qiang1,2; Xu, Ye2,4; Ju, Bing-Gang2,4
2013-01-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume763Issue:1Pages:1-32
Corresponding AuthorGan, CG (reprint author), Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan RD, Shanghai 200030, Peoples R China. Email: cggan@shao.ac.cn
AbstractWe have observed a sample of 288 molecular outflow sources including 123 high-mass and 165 low-mass sources in order to search for class I methanol masers at the 95 GHz transition and to investigate the relationship between outflow characteristics and class I methanol maser emission with the Purple Mountain Observatory 13.7 m radio telescope. Our survey detected 62 sources with 95 GHz methanol masers above a 3 sigma detection limit, which includes 47 high-mass sources and 15 low-mass sources. Therefore, the detection rate is 38% for high-mass outflow sources and 9% for low-mass outflow sources, suggesting that class Imethanol masers are relatively easily excited in high-mass sources. There are 37 newly detected 95 GHz methanol masers (including 27 high-mass and 10 low-mass sources), 19 of which are newly identified (i.e., first identification) class I methanol masers (including 13 high-mass and 6 low-mass sources). A statistical analysis of the distributions of maser detections with the outflow parameters reveals that the maser detection efficiency increases with the outflow properties (e.g., mass, momentum, kinetic energy, mechanical luminosity of outflows, etc.). Systematic investigations of the relationships between the intrinsic luminosity of methanol masers and the outflow properties (including mass, momentum, kinetic energy, bolometric luminosity, and mass-loss rate of the central stellar sources) indicate a positive correlation. This further supports the theory that class I methanol masers are collisionally pumped and associated with shocks when outflows interact with the surrounding ambient medium.
KeywordGalaxies: Star Formation Ism: Jets And Outflows Masers Radio Lines: Ism
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/763/1/2
WOS KeywordEXTENDED GREEN OBJECTS ; MASS STAR-FORMATION ; INTERSTELLAR CLOUDS ; BIPOLAR OUTFLOWS ; GENERAL CATALOG ; FORMING REGIONS ; DIAGNOSTIC-TOOL ; GLIMPSE SURVEY ; EMISSION ; SAMPLE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000313456700002
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9924
Collection紫金山天文台青海观测站
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Shanghai 200030, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Gan, Cong-Gui,Chen, Xi,Shen, Zhi-Qiang,et al. A SEARCH FOR 95 GHz CLASS I METHANOL MASERS IN MOLECULAR OUTFLOWS[J]. ASTROPHYSICAL JOURNAL,2013,763(1):1-32.
APA Gan, Cong-Gui,Chen, Xi,Shen, Zhi-Qiang,Xu, Ye,&Ju, Bing-Gang.(2013).A SEARCH FOR 95 GHz CLASS I METHANOL MASERS IN MOLECULAR OUTFLOWS.ASTROPHYSICAL JOURNAL,763(1),1-32.
MLA Gan, Cong-Gui,et al."A SEARCH FOR 95 GHz CLASS I METHANOL MASERS IN MOLECULAR OUTFLOWS".ASTROPHYSICAL JOURNAL 763.1(2013):1-32.
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