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PARALLAXES FOR W49N AND G048.60+0.02: DISTANT STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM
Zhang, B.1,2; Reid, M. J.3; Menten, K. M.1; Zheng, X. W.4; Brunthaler, A.1; Dame, T. M.3; Xu, Y.5; Zhang, B (reprint author), Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany. Email: 0
2013-09-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume775Issue:1Pages:0
AbstractWe report trigonometric parallax measurements of 22 GHz H2O masers in two massive star-forming regions from Very Long Baseline Array observations as part of the Bar and Spiral Structure Legacy Survey. The distances of 11.11(-0.69)(+0.79) kpc to W49N (G043.16+0.01) and 10.75(-0.55)(+0.61) kpc to G048.60+0.02 locate them in a distant section of the Perseus arm near the solar circle in the first Galactic quadrant. This allows us to locate accurately the inner portion of the Perseus arm for the first time. Combining the present results with sources measured in the outer portion of the arm in the second and third quadrants yields a global pitch angle of 9 degrees.5 +/- 1 degrees.3 for the Perseus arm. We have found almost no H2O maser sources in the Perseus arm for 50 degrees < l < 80 degrees, suggesting that this approximate to 6 kpc section of the arm has little massive star formation activity.
KeywordAstrometry Galaxy: Fundamental Parameters Galaxy: Kinematics And Dynamics Masers Stars: Formation Techniques: High Angular Resolution
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/775/1/79
WOS KeywordBASE-LINE INTERFEROMETRY ; MILKY-WAY ; TRIGONOMETRIC PARALLAXES ; FUNDAMENTAL PARAMETERS ; GALACTIC STRUCTURE ; VLBI ASTROMETRY ; BESSEL SURVEY ; KINEMATICS ; GALAXY ; MOTIONS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000324615800079
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9928
Collection紫金山天文台青海观测站
Corresponding AuthorZhang, B (reprint author), Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany. Email: 0
Affiliation1.Max Planck Inst Radioastron, D-53121 Bonn, Germany
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
4.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Zhang, B.,Reid, M. J.,Menten, K. M.,et al. PARALLAXES FOR W49N AND G048.60+0.02: DISTANT STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM[J]. ASTROPHYSICAL JOURNAL,2013,775(1):0.
APA Zhang, B..,Reid, M. J..,Menten, K. M..,Zheng, X. W..,Brunthaler, A..,...&Zhang, B .(2013).PARALLAXES FOR W49N AND G048.60+0.02: DISTANT STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM.ASTROPHYSICAL JOURNAL,775(1),0.
MLA Zhang, B.,et al."PARALLAXES FOR W49N AND G048.60+0.02: DISTANT STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM".ASTROPHYSICAL JOURNAL 775.1(2013):0.
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