Periodic Change of Solar Differential Rotation
Periodic Change of Solar Differential Rotation
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DOI：
10.1086/426044
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
S. Itoh;K. Itoh;A. Yoshizawa;N. Yokoi
中科院分区：
文献类型：
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作者：
S. Itoh;K. Itoh;A. Yoshizawa;N. Yokoi
利用MHD发电机理论研究了太阳非均匀旋转的周期振荡。存在由流体的涡度（即γ发电机）驱动的湍流电动势。此外，涡度方程中也存在对应的情况，即湍流等离子体中不均匀磁场通过γ-发电机过程诱导旋转。在此基础上，在规定的太阳磁周期下，从理论上解释了太阳差转周期为11年的周期性变化。将预测振幅与观测值进行比较。
The periodic oscillation of the inhomogeneous rotation of the Sun is studied by use of the MHD dynamo theory. There exists a turbulent electromotive force that is driven by the vorticity of the flow (i.e., the γ dynamo). In addition, its counterpart exists in the vorticity equation, that is, the rotation is induced by an inhomogeneous magnetic field in turbulent plasmas through the γ-dynamo process. Based on this dynamo theory, a periodic change of solar differential rotation with a period of 11 yr is theoretically explained under the prescribed solar magnetic cycle. The predicted amplitude is compared with observations.