DISTANCE AND PROPER MOTION MEASUREMENT OF THE RED SUPERGIANT, S PERSEI, WITH VLBI H2O MASER ASTROMETRY
文献类型：期刊论文
| 作者 | Asaki, Y.1,2; Deguchi, S.3; Imai, H.4; Hachisuka, K.5; Miyoshi, M.6; Honma, M.7 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2010-09-20 |
| 卷号 | 721期号:1页码:267-277 |
| 关键词 | Galaxy: structure masers supergiants |
| 英文摘要 | We have conducted Very Long Baseline Array phase-referencing monitoring of H2O masers around the red supergiant, S Persei, for six years. We have fitted maser motions to a simple expanding-shell model with a common annual parallax and stellar proper motion, and obtained the annual parallax as 0.413 +/- 0.017 mas and the stellar proper motion as (-0.49 +/- 0.23 mas yr(-1), -1.19 +/- 0.20 mas yr(-1)) in right ascension and declination, respectively. The obtained annual parallax corresponds to the trigonometric distance of 2.42(-0.09)(+0.11) kpc. Assuming a Galactocentric distance of the Sun of 8.5 kpc, the circular rotational velocity of the local standard of rest at a distance of the Sun of 220 km s(-1), and a flat Galactic rotation curve, S Persei is suggested to have a non-circular motion deviating from the Galactic circular rotation for 15 km s(-1), which is mainly dominated by the anti-rotation direction component of 12.9 +/- 2.9 km s(-1). This red supergiant is thought to belong to the OB association, Per OB1, so that this non-circular motion is representative of a motion of the OB association in the Milky Way. This non-circular motion is somewhat larger than that explained by the standard density-wave theory for a spiral galaxy and is attributed to either a cluster shuffling of the OB association, or to non-linear interactions between non-stationary spiral arms and multi-phase interstellar media. The latter comes from a new view of a spiral arm formation in the Milky Way suggested by recent large N-body/ smoothed particle hydrodynamics numerical simulations. |
| 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 ; TRIGONOMETRIC PARALLAXES ; SPIRAL STRUCTURE ; WATER MASERS ; MILKY-WAY ; GALAXY ; KINEMATICS ; DISK ; PARAMETERS ; VELOCITIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000282192900017 |
| 源URL | [http://119.78.226.72/handle/331011/19970]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Inst Space & Astronaut Sci, Kanagawa 2525210, Japan 2.Grad Univ Adv Studies SOKENDAI, Dept Space & Astronaut Sci, Sch Phys Sci, Kanagawa 2525210, Japan 3.Nobeyama Radio Observ, Minamimaki, Minamisaku 3841305, Japan 4.Kagoshima Univ, Dept Phys & Astron, Grad Sch Sci & Engn, Kagoshima 8900065, Japan 5.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 6.Natl Astron Observ Japan, Div Radio Astron, Tokyo 1818588, Japan 7.Natl Astron Observ Japan, Mizusawa VLBI Observ, Tokyo 1818588, Japan |
| 推荐引用方式 GB/T 7714 | Asaki, Y.,Deguchi, S.,Imai, H.,et al. DISTANCE AND PROPER MOTION MEASUREMENT OF THE RED SUPERGIANT, S PERSEI, WITH VLBI H2O MASER ASTROMETRY[J]. ASTROPHYSICAL JOURNAL,2010,721(1):267-277. |
| APA | Asaki, Y.,Deguchi, S.,Imai, H.,Hachisuka, K.,Miyoshi, M.,&Honma, M..(2010).DISTANCE AND PROPER MOTION MEASUREMENT OF THE RED SUPERGIANT, S PERSEI, WITH VLBI H2O MASER ASTROMETRY.ASTROPHYSICAL JOURNAL,721(1),267-277. |
| MLA | Asaki, Y.,et al."DISTANCE AND PROPER MOTION MEASUREMENT OF THE RED SUPERGIANT, S PERSEI, WITH VLBI H2O MASER ASTROMETRY".ASTROPHYSICAL JOURNAL 721.1(2010):267-277. |
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来源：上海天文台
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