考虑非局域α效应的太阳发电机模型中灾变猝灭的缓和
Alleviation of catastrophic quenching in solar dynamo model with nonlocal alpha-effect
摘要：
Babcock-Leighton型非定域α效应由于磁螺旋度守恒而不易发生灾难性猝灭。这是一个发电机模型，它联合应用非局部α效应，抗磁泵，和磁α效应的动力学方程。相同的模型显示灾难性的淬火时，α效应改变其本地配方。非局部模型显示了偶极对称磁场的优先激发，其振荡周期约为10年，并且具有约1000倍的环极场比。
英文摘要：
The nonlocal alpha-effect of Babcock-Leighton type is not prone to the catastrophic quenching due to conservation of magnetic helicity. This is shown with a dynamo model, which jointly applies the nonlocal alpha-effect, the diamagnetic pumping, and dynamical equation for the magnetic alpha-effect. The same model shows catastrophic quenching when the alpha-effect is changed to its local formulation. The nonlocal model shows the preferred excitation of magnetic fields of dipolar symmetry, which oscillate with a period of about ten years and have a toroidal-to-polar fields ratio of about a thousand.
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