PARALLAXES FOR W49N AND G048.60+0.02: DISTANT STAR FORMING REGIONS IN THE PERSEUS SPIRAL ARM

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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
刊名	ASTROPHYSICAL JOURNAL
	2013-09-20
卷号	775 期号:1 页码:0
关键词	astrometry Galaxy: fundamental parameters Galaxy: kinematics and dynamics masers stars: formation techniques: high angular resolution
ISSN号	0004-637X
通讯作者	Zhang, B (reprint author), Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany. Email: 0
英文摘要	We 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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	BASE-LINE INTERFEROMETRY ; MILKY-WAY ; TRIGONOMETRIC PARALLAXES ; FUNDAMENTAL PARAMETERS ; GALACTIC STRUCTURE ; VLBI ASTROMETRY ; BESSEL SURVEY ; KINEMATICS ; GALAXY ; MOTIONS
收录类别	SCI
语种	英语
WOS记录号	WOS:000324615800079
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9928]
专题	紫金山天文台_紫金山天文台青海观测站
作者单位	1.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
推荐引用方式 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..,...&Xu, Y..(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.