| The Kinematic Theory of Solar Dynamo |
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| 作者姓名： | Ke-Ke Zhang and Xin-Hao LiaoSchool of Mathematical Sciences University of Exeter EX QE UK kzhang@ex.ac.ukShanghai Astronomical Observatory Shanghai xhliao@center.shao.ac.cn |
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| 作者单位： | Ke-Ke Zhang and Xin-Hao LiaoSchool of Mathematical Sciences，University of Exeter，EX4 4QE，UK; kzhang@ex.ac.ukShanghai Astronomical Observatory，Shanghai 200030; xhliao@center.shao.ac.cn |
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| 基金项目： | Supported by the National Natural Science Foundation of China and UK Royal Society grant. |
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| 摘 要： | Generation of the Sun‘s magnetic fields by self-inductive processes in the solar electrically conducting interior, the solar dynamo theory, is a fundamentally important subject in astrophysics. The kinematic dynamo theory concerns how the magnetic fields are produced by kinematically possible flows without being constrained by the dynamic equation. We review a number of basic aspects of the kinematic dynamo theory, including the magnetohydrodynamic approximation for the dynamo equation, the impossibility of dynamo action with the solar differential rotation, the Cowling‘s anti-dynamo theorem in the solar context, the turbulent alpha effect and recently constructed three-dimensional interface dynamos controlled by the solar tachocline at the base of the convection zone.
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| 关 键 词： | 太阳磁场 运动发电 旋转函数 磁流体力学 |
The Kinematic Theory of Solar Dynamo |
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| Ke-Ke Zhang and Xin-Hao LiaoSchool of Mathematical Sciences,University of Exeter,EX QE,UK, kzhang@ex.ac.ukShanghai Astronomical Observatory,Shanghai , xhliao@center.shao.ac.cn.The Kinematic Theory of Solar Dynamo[J].Chinese Journal of Astronomy and Astrophysics,2003,3(1):12-33. |
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| Authors: | Ke-Ke Zhang Xin-Hao Liao |
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| Institution: | [1]SchoolofMathematicalSciences,UniversityofExeter,EX44QE,UK [2]ShanghaiAstronomicalObservatory,Shanghai200030 |
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| Abstract: | Generation of the Sun's magnetic fields by self-inductive processes in the solar electrically conducting interior, the solar dynamo theory, is a fundamentally important subject in astrophysics. The kinematic dynamo theory concerns how the magnetic fields are produced by kinematically possible flows without being constrained by the dynamic equation. We review a number of basic aspects of the kinematic dynamo theory, including the magnetohydrodynamic approximation for the dynamo equation, the impossibility of dynamo action with the solar differential rotation, the Cowling's anti-dynamo theorem in the solar context, the turbulent alpha effect and recently constructed three-dimensional interface dynamos controlled by the solar tachocline at the base of the convection zone. |
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| Keywords: | Solar magnetic fields - kinematic dynamos - magnetohydrody- namics |
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