A magnetohydrodynamical model for the formation of episodic jets
文献类型：期刊论文
| 作者 | Yuan, Feng1 ; Lin, Jun2,3; Wu, Kinwah4; Ho, Luis C.5
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2009-06-01 |
| 卷号 | 395期号:4页码:2183-2188 |
| 关键词 | accretion black hole physics MHD ISM: jets and outflow accretion discs |
| 英文摘要 | Episodic ejection of plasma blobs has been observed in many black hole systems. While steady, continuous jets are believed to be associated with large-scale open magnetic fields, what causes the episodic ejection of blobs remains unclear. Here by analogy with the coronal mass ejection on the Sun, we propose a magnetohydrodynamical model for episodic ejections from black holes associated with the closed magnetic fields in an accretion flow. Shear and turbulence of the accretion flow deform the field and result in the formation of a flux rope in the disc corona. Energy and helicity are accumulated and stored until a threshold is reached. The system then loses its equilibrium and the flux rope is thrust outward by the magnetic compression force in a catastrophic way. Our calculations show that for parameters appropriate for the black hole in our Galactic centre, the plasmoid can attain relativistic speeds in about 35 min. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MAGNETICALLY DRIVEN ACCRETION ; ADVECTION-DOMINATED ACCRETION ; CORONAL MASS EJECTIONS ; BLACK-HOLES ; SAGITTARIUS-A ; SOLAR ERUPTIONS ; GRS 1915+105 ; DISKS ; FLOWS ; FIELD |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000266112600034 |
| 公开日期 | 2015-03-17 |
| 源URL | [http://119.78.226.72//handle/331011/15886]  |
| 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, Key Lab Res Galaxies & Cosmol, JOINGC SHAO & USTC, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China 3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 4.Univ Coll London, Mullard Space Sci Lab, Holmbury RH5 6NT, Surrey, England 5.Carnegie Inst Washington Observ, Pasadena, CA 91101 USA |
| 推荐引用方式 GB/T 7714 | Yuan, Feng,Lin, Jun,Wu, Kinwah,et al. A magnetohydrodynamical model for the formation of episodic jets[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,395(4):2183-2188. |
| APA | Yuan, Feng,Lin, Jun,Wu, Kinwah,&Ho, Luis C..(2009).A magnetohydrodynamical model for the formation of episodic jets.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,395(4),2183-2188. |
| MLA | Yuan, Feng,et al."A magnetohydrodynamical model for the formation of episodic jets".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 395.4(2009):2183-2188. |
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来源：上海天文台
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