| Автор | Lan Xiao-Xia |
| Автор | Wang Ding-Xiong |
| Автор | Gan Zhao-Ming |
| Дата выпуска | 2005-09-01 |
| dc.description | The screw instability of the magnetic field is discussed based on its poloidal configuration generated by a single toroidal electric current flowing in the equatorial plane of a Kerr black hole (BH). The rotation of the BH relative to the disc induces an electromotive force, which in turn results in a poloidal electric current. By using Ampere's law, we calculate the toroidal component of the magnetic field and derive a criterion for the screw instability of the magnetic field connecting the rotating BH with its surrounding disc. It is determined that the screw instability is related to two parameters: the radius of the disc and the BH spin. The occurrence of screw instability is depicted in a parameter space. In addition, we discuss the effect of the screw instability on magnetic extraction of energy from the rotating BH. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Connection of Screw Instability with Electric Current in an Accretion Disc around a Black Hole |
| Тип | paper |
| DOI | 10.1088/0256-307X/22/9/087 |
| Electronic ISSN | 1741-3540 |
| Print ISSN | 0256-307X |
| Журнал | Chinese Physics Letters |
| Том | 22 |
| Первая страница | 2455 |
| Последняя страница | 2458 |
| Аффилиация | Lan Xiao-Xia; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
| Аффилиация | Wang Ding-Xiong; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
| Аффилиация | Gan Zhao-Ming; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
| Выпуск | 9 |
