| A New Formulation for General Relativistic Force-Free Electrodynamics and Its Applications |
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| 作者姓名： | Cong Yu |
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| 作者单位： | National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | We formulate the general relativistic force-free electrodynamics in a new 3 ＋ 1 language. In this formulation, when we have properly defined electric and magnetic fields, the covariant Maxwell equations could be cast in the traditional form with new vacuum constitutive constraint equations. The fundamental equation governing a stationary, axisymmetric force-free black hole magnetosphere is derived using this formulation which recasts the Grad-Shafranov equation in a simpler way. Compared to the classic 3＋1 system of Thorne and MacDonald, the new system of 3＋1 equations is more suitable for numerical use for it keeps the hyperbolic structure of the electrodynamics and avoids the singularity at the event horizon. This formulation could be readily extended to non-relativistic limit and find applications in fiat spacetime. We investigate its application to disk wind, black hole magnetosphere and solar physics in both fiat and curved spacetime.
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| 关 键 词： | 磁场 吸积 射流 相对性 电动力学 |
| 收稿时间： | 2007-02-07 |
| 修稿时间： | 2007-10-31 |
A New Formulation for General Relativistic Force-Free Electrodynamics and Its Applications |
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| Abstract: | |
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| Keywords: | method analytical -- magnetic fields -- accretion --jet -- relativity |
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