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THE PARALLAX OF W43: A MASSIVE STAR-FORMING COMPLEX NEAR THE GALACTIC BAR
Zhang, B.1,2; Moscadelli, L.3; Sato, M.1; Reid, M. J.4; Menten, K. M.1; Zheng, X. W.5; Brunthaler, A.1; Dame, T. M.4; Xu, Y.6; Immer, K.1
2014-02-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume781Issue:2Pages:0
AbstractWe report trigonometric parallax measurements of masers in the massive star-forming complex W43 from Very Long Baseline Array observations as part of the Bar and Spiral Structure Legacy Survey. Based on measurements of three 12 GHz methanol maser sources (G029.86-00.04, G029.95-00.01, and G031.28+00.06) and one 22 GHz water maser source (G031.58+ 00.07) toward W43, we derived a distance of 5.49(-0.34)(+0.39) kpc to W43. By associating the masers with CO molecular clouds, and associating the clouds kinematically with CO longitude-velocity spiral features, we assign W43 to the Scutum spiral arm, close to the near end of the Galactic bar. The peculiar motion of W43 is about 20 km s(-1) toward the Galactic Center and is very likely induced by the gravitational attraction of the bar.
KeywordAstrometry Galaxy: Kinematics And Dynamics Masers Stars: Formation Stars: Individual (W43) Techniques: High Angular Resolution
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/781/2/89
WOS KeywordH-II REGIONS ; GHZ METHANOL MASERS ; BASE-LINE INTERFEROMETRY ; MILKY-WAY ; TRIGONOMETRIC PARALLAXES ; VLBI OBSERVATIONS ; MOLECULAR CLOUDS ; SPIRAL STRUCTURE ; BESSEL SURVEY ; INNER GALAXY
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Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000331171200033
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10720
Collection紫金山天文台青海观测站
Affiliation1.Max Planck Inst Radioastron, D-53121 Bonn, Germany
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy
4.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
5.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, B.,Moscadelli, L.,Sato, M.,et al. THE PARALLAX OF W43: A MASSIVE STAR-FORMING COMPLEX NEAR THE GALACTIC BAR[J]. ASTROPHYSICAL JOURNAL,2014,781(2):0.
APA Zhang, B..,Moscadelli, L..,Sato, M..,Reid, M. J..,Menten, K. M..,...&Immer, K..(2014).THE PARALLAX OF W43: A MASSIVE STAR-FORMING COMPLEX NEAR THE GALACTIC BAR.ASTROPHYSICAL JOURNAL,781(2),0.
MLA Zhang, B.,et al."THE PARALLAX OF W43: A MASSIVE STAR-FORMING COMPLEX NEAR THE GALACTIC BAR".ASTROPHYSICAL JOURNAL 781.2(2014):0.
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