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题名: FIRST PARALLAX MEASUREMENTS TOWARD A 6.7 GHz METHANOL MASER WITH THE AUSTRALIAN LONG BASELINE ARRAY-DISTANCE TO G 339.884-1.259
作者: Krishnan, V.1, 2; Ellingsen, S. P.1; Reid, M. J.3; Brunthaler, A.4; Sanna, A.4; McCallum, J.1; Reynolds, C.5; Bignall, H. E.5; Phillips, C. J.2; Dodson, R.6; Rioja, M.6, 7; Caswell, J. L.2; Chen, X.8; Dawson, J. R.2, 9; Fujisawa, K.10; Goedhart, S.11, 16; Green, J. A.2, 12; Hachisuka, K.8, 10; Honma, M.13; Menten, K.4; Shen, Z. Q.8; Voronkov, M. A.2; Walsh, A. J.5; Xu Ye(徐烨)14; Zhang, B.8; Zheng, X. W.15
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-06-01
卷号: 805, 期号:2, 页码:129
关键词: astrometry ; Galaxy: kinematics and dynamics ; masers ; stars: formation
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/805/2/129
文章类型: Article
英文摘要: We have conducted the first parallax and proper motion measurements of 6.7 GHz methanol maser emission using the Australian Long Baseline Array. The parallax of G 339.884-1.259 measured from five epochs of observations is 0.48 +/- 0.08 mas, corresponding to a distance of 2.1(-0.3)(+0.4) kpc, placing it in the Scutum spiral arm. This is consistent (within the combined uncertainty) with the kinematic distance estimate for this source at 2.5 +/- 0.5 kpc using the latest Solar and Galactic rotation parameters. We find from the Lyman continuum photon flux that the embedded core of the young star is of spectral type B1, demonstrating that luminous 6.7 GHz methanol masers can be associated with high-mass stars toward the lower end of the mass range.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: STAR-FORMING REGIONS ; H-II REGIONS ; PERSEUS SPIRAL ARM ; OUTER ROTATION CURVE ; TRIGONOMETRIC PARALLAXES ; MILKY-WAY ; GALACTIC LONGITUDES ; VLBI ASTROMETRY ; HIGH-RESOLUTION ; MASSIVE STARS
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000356715400044
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14903
Appears in Collections:紫金山天文台青海观测站_期刊论文

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作者单位: 1.Univ Tasmania, Sch Phys Sci, Hobart, Tas 7001, Australia
2.CSIRO, Australia Telescope Natl Fac, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia
3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
4.Max Planck Inst Radioastron, D-53121 Bonn, Germany
5.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia
6.Univ Western Australia M468, Int Ctr Radio Astron Res, Crawley, WA 09, Australia
7.Observ Astron Nacl IGN, E-28014 Madrid, Spain
8.Shanghai Astron Observ, Shanghai 200030, Peoples R China
9.Macquarie Univ, Dept Phys & Astron, MQ Res Ctr Astron Astrophys & Astrophoton, N Ryde, NSW 2109, Australia
10.Yamaguchi Univ, Fac Sci, Dept Phys, Yamaguchi 7538512, Japan
11.Hartebeesthoek Radio Astron Observ, ZA-1740 Krugersdorp, South Africa
12.Jodrell Bank Observ, SKA Org, Macclesfield SK11 9DL, Cheshire, England
13.Grad Univ Adv Study, Natl Astron Observ Japan & Dept Astron Sci, Mizusawa VLBI Observ, Mitaka, Tokyo 1818588, Japan
14.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
15.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
16.SKA South Africa, ZA-7405 Pinelands, South Africa
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