Oscillation Phenomena in the Disk around the Massive Black Hole Sagittarius A*
文献类型：期刊论文
| 作者 | Miyoshi, Makoto1; Shen, Zhi-Qiang2; Oyama, Tomoaki1; Takahashi, Rohta3; Kato, Yoshiaki1 |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2011 |
| 卷号 | 63期号:5页码:1093-1116 |
| 关键词 | accretion black hole physics quasi-periodic oscillations radio: individuals (Sagittarius A*) accretion disks |
| 英文摘要 | We report the detection of radio QPOs with structure changes using the Very Long Baseline Array (VLBA) at 43 GHz. We found conspicuous patterned changes of the structure with P = 16.8 +/- 1.4, 22.2 +/- 1.4, 31.4 +/- 1.5, 56.4 +/- 6 min roughly in a 3:4:6:10 ratio. The first two periods show a rotating one-arm structure, while P = 31.4 min shows a rotating 3-arm structure, as if viewed edge-on. At the central 50 mu as the P = 56.4 min period shows a double-amplitude variation of those in its surroundings. The spatial distributions of the oscillation periods suggest that the disk of Sgr A* is roughly edge-on, rotating around an axis with PA = -10 degrees. Presumably, the observed VLBI images of Sgr A* at 43 GHz retain several features of the black hole accretion disk of Sgr A* in spite of being obscured and broadened by scattering of surrounding plasma. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | NEAR-INFRARED FLARES ; GALACTIC-CENTER ; SGR-A ; X-RAY ; INTRINSIC SIZE ; MILKY-WAY ; EMISSION ; SPIN ; VARIABILITY ; WAVELENGTHS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000297089900021 |
| 源URL | [http://119.78.226.72/handle/331011/26416]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Natl Astron Observ Japan, Tokyo 1818588, Japan 2.Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Tomakomai Natl Coll Technol, Dept Nat & Phys Sci, Tomakomai, Hokkaido 0591257, Japan |
| 推荐引用方式 GB/T 7714 | Miyoshi, Makoto,Shen, Zhi-Qiang,Oyama, Tomoaki,et al. Oscillation Phenomena in the Disk around the Massive Black Hole Sagittarius A*[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2011,63(5):1093-1116. |
| APA | Miyoshi, Makoto,Shen, Zhi-Qiang,Oyama, Tomoaki,Takahashi, Rohta,&Kato, Yoshiaki.(2011).Oscillation Phenomena in the Disk around the Massive Black Hole Sagittarius A*.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,63(5),1093-1116. |
| MLA | Miyoshi, Makoto,et al."Oscillation Phenomena in the Disk around the Massive Black Hole Sagittarius A*".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 63.5(2011):1093-1116. |
入库方式： OAI收割
来源：上海天文台
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