A Measurement of Proper Motions of SiO Maser Sources in the Galactic Center with the VLBA
文献类型：期刊论文
| 作者 | Oyama, Tomoaki1,2; Miyoshi, Makoto3; Deguchi, Shuji4,5; Imai, Hiroshi6; Shen, Zhi-Qiang7 |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 出版日期 | 2008 |
| 卷号 | 60期号:1页码:11-22 |
| 关键词 | astrometry galaxy : center galaxy : nucleus stars : kinematics |
| 英文摘要 | We report on the high-precision astrometric observations of maser sources around the Galactic Center in the SiO J = 1-0 v = 1 and 2 lines with the VLBA during 2001-2004. With phase-referencing interferometry referred to the radio continuum source Sgr A*, accurate positions of masers were obtained for three detected objects: IRS 10EE (7 epochs), IRS 15NE (2 epochs), and SiO 6 (only 1 epoch). Because circumstellar masers of these objects were resolved into several components, proper motions for the maser sources were derived with several different methods. Combining our VLBA results with those of the previous VLA observations, we obtained the IRS 10EE proper motion of 76 +/- 3 km s(-1) (at 8 kpc) to the south relative to Sgr A*. Almost null proper motion of this star in the east-west direction results in a net transverse motion of the infrared reference frame of about 30 9 km s-1 to the west relative to Sgr A*. The proper-motion data also suggests that IRS WEE is an astrometric binary with an unseen massive companion. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SAGITTARIUS-A-ASTERISK ; LARGE-AMPLITUDE VARIABLES ; SUPERMASSIVE BLACK-HOLE ; CENTRAL PARSEC ; SGR-A ; STAR-FORMATION ; STELLAR VARIABILITY ; RADIO-SOURCE ; OH/IR STARS ; H2O MASER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000255818000002 |
| 源URL | [http://119.78.226.72/handle/331011/19460]  |
| 专题 | 上海天文台_VLBI研究室 |
| 作者单位 | 1.Univ Tokyo, Sch Sci, Inst Astron, Mitaka, Tokyo 1810015, Japan 2.Natl Astron Observ, VERA Project Off, Mitaka, Tokyo 1818588, Japan 3.Natl Astron Observ, Div Radio Astron, Mitaka, Tokyo 1818588, Japan 4.Natl Astron Observ, Nobeyama Radio Observ, Minamisa Ku, Minamimaki, Nagano 3841305, Japan 5.Grad Univ Adv Studies, Nobeyama Radio Observ, Dept Astron Sci, Minamisa Ku, Minamimaki, Nagano 3841305, Japan 6.Kagoshima Univ, Fac Sci, Dept Phys, Kagoshima 8900065, Japan 7.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Oyama, Tomoaki,Miyoshi, Makoto,Deguchi, Shuji,et al. A Measurement of Proper Motions of SiO Maser Sources in the Galactic Center with the VLBA[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2008,60(1):11-22. |
| APA | Oyama, Tomoaki,Miyoshi, Makoto,Deguchi, Shuji,Imai, Hiroshi,&Shen, Zhi-Qiang.(2008).A Measurement of Proper Motions of SiO Maser Sources in the Galactic Center with the VLBA.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,60(1),11-22. |
| MLA | Oyama, Tomoaki,et al."A Measurement of Proper Motions of SiO Maser Sources in the Galactic Center with the VLBA".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 60.1(2008):11-22. |
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来源：上海天文台
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