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A 95 GHz CLASS I METHANOL MASER SURVEY TOWARD A SAMPLE OF GLIMPSE POINT SOURCES ASSOCIATED WITH BGPS CLUMPS
Chen, Xi1,2; Ellingsen, Simon P.3; He, Jin-Hua4; Xu, Ye5; Gan, Cong-Gui1,2; Shen, Zhi-Qiang1,2; An, Tao1,2; Sun, Yan5; Ju, Bing-Gang5
2012-05-01
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume200Issue:1Pages:L29(58pp)
AbstractWe report a survey with the Purple Mountain Observatory 13.7 m radio telescope for class I methanol masers from the 95 GHz (8(0)-7(1) A(+)) transition. Two hundred and fourteen target sources were selected by combining information from both the Spitzer GLIMPSE and 1.1 mm Bolocam Galactic Plane Survey (BGPS) catalogs. The observed sources satisfy the GLIMPSE mid-IR criteria of [3.6]-[4.5] > 1.3, [3.6]-[5.8] > 2.5, [3.6]-[8.0]> 2.5 and 8.0 mu m mag less than 10; they also have an associated 1.1 mm BGPS source. Class I methanol maser emission was detected in 63 sources, corresponding to a detection rate of 29% for this survey. For the majority of detections (43), this is the first identification of class I methanol masers associated with these sources. We show that the intensity of the class I methanol maser emission is not closely related to mid-IR intensity or the colors of the GLIMPSE point sources; however, it is closely correlated with properties (mass and beam-averaged column density) of the BGPS sources. Comparison of measures of star formation activity for the BGPS sources with and without class I methanol masers indicates that the sources with class I methanol masers usually have higher column density and larger flux density than those without them. Our results predict that the criteria log(S-int) <= -38.0 + 1.72 log(N-H2(beam)) and log(N-H2(beam)) >= 22.1, which utilizes both the integrated flux density (S-int) and beam-averaged column density (N-H2(beam) ) of the BGPS sources, are very efficient for selecting sources likely to have an associated class I methanol maser. Our expectation is that searches using these criteria will detect 90% of the predicted number of class I methanol masers from the full BGPS catalog (similar to 1000), and that they will do so with a high detection efficiency (similar to 75%).
KeywordInfrared: Ism Ism: Molecules Masers Radio Lines: Ism Stars: Formation
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0067-0049/200/1/5
WOS KeywordINFRARED-DARK CLOUDS ; EXTENDED GREEN OBJECTS ; GALACTIC PLANE SURVEY ; STAR-FORMING REGIONS ; YOUNG STELLAR OBJECTS ; PHYSICAL-PROPERTIES ; MOLECULAR CLOUD ; MILKY-WAY ; CATALOG ; BOLOCAM
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000303928300005
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8114
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, Beijing 100864, Peoples R China
3.Univ Tasmania, Sch Math & Phys, Hobart, Tas, Australia
4.Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China
5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xi,Ellingsen, Simon P.,He, Jin-Hua,et al. A 95 GHz CLASS I METHANOL MASER SURVEY TOWARD A SAMPLE OF GLIMPSE POINT SOURCES ASSOCIATED WITH BGPS CLUMPS[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2012,200(1):L29(58pp).
APA Chen, Xi.,Ellingsen, Simon P..,He, Jin-Hua.,Xu, Ye.,Gan, Cong-Gui.,...&Ju, Bing-Gang.(2012).A 95 GHz CLASS I METHANOL MASER SURVEY TOWARD A SAMPLE OF GLIMPSE POINT SOURCES ASSOCIATED WITH BGPS CLUMPS.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,200(1),L29(58pp).
MLA Chen, Xi,et al."A 95 GHz CLASS I METHANOL MASER SURVEY TOWARD A SAMPLE OF GLIMPSE POINT SOURCES ASSOCIATED WITH BGPS CLUMPS".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 200.1(2012):L29(58pp).
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