FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*
文献类型：期刊论文
| 作者 | Mou, Guobin1,2; Yuan, Feng1 ; Bu, Defu1; Sun, Mouyuan3,4,5,6; Su, Meng7,8
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-08-01 |
| 卷号 | 790期号:2页码:109 |
| 关键词 | accretion black hole physics galaxies: active galaxies: jets Galaxy: nucleus accretion disks |
| 通讯作者 | 袁峰 |
| 英文摘要 | A pair of giant gamma-ray Bubbles has been revealed by Fermi-LAT. In this paper we investigate their formation mechanism. Observations have indicated that the activity of the supermassive black hole located at the Galactic center, Sgr A*, was much stronger than at the present time. Specifically, one possibility is that while Sgr A* was also in the hot accretion regime, the accretion rate should be 10(3)-10(4) times higher during the past similar to 10(7) yr. On the other hand, recent magnetohydrodynamic numerical simulations of hot accretion flows have unambiguously shown the existence and obtained the properties of strong winds. Based on this knowledge, by performing three-dimensional hydrodynamical simulations, we show in this paper that the Fermi Bubbles could be inflated by winds launched from the "past" hot accretion flow in Sgr A*. In our model, the active phase of Sgr A* is required to last for about 10 million years and it was quenched no more than 0.2 million years ago. The central molecular zone (CMZ) is included and it collimates the wind orientation toward the Galactic poles. Viscosity suppresses the Rayleigh-Taylor and Kelvin-Helmholtz instabilities and results in the smoothness of the Bubbles edge. The main observational features of the Bubbles can be well explained. Specifically, the ROSAT X-ray features are interpreted by the shocked interstellar medium and the interaction region between the wind and CMZ gas. The thermal pressure and temperature obtained in our model are consistent with recent Suzaku observations. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SUPERMASSIVE BLACK-HOLE ; ADVECTION-DOMINATED ACCRETION ; ACTIVE GALACTIC NUCLEI ; RAY REFLECTION-NEBULA ; SAGITTARIUS B2 CLOUD ; STELLAR ORBITS ; MILKY-WAY ; NUMERICAL-SIMULATION ; INTERSTELLAR BUBBLES ; CENTRAL PARSEC |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339115800026 |
| 公开日期 | 2015-02-14 |
| 源URL | [http://119.78.226.72//handle/331011/15854]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 4.Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China 5.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA 6.Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA 7.MIT, Dept Phys, Cambridge, MA 02139 USA 8.MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA |
| 推荐引用方式 GB/T 7714 | Mou, Guobin,Yuan, Feng,Bu, Defu,et al. FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*[J]. ASTROPHYSICAL JOURNAL,2014,790(2):109. |
| APA | Mou, Guobin,Yuan, Feng,Bu, Defu,Sun, Mouyuan,&Su, Meng.(2014).FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*.ASTROPHYSICAL JOURNAL,790(2),109. |
| MLA | Mou, Guobin,et al."FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*".ASTROPHYSICAL JOURNAL 790.2(2014):109. |
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来源：上海天文台
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