Pinch Instabilities in Magnetic Stars
Pinch Instabilities in Magnetic Stars
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DOI：
10.1093/mnras/162.4.339
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发表时间：
1973-06
影响因子：
4.8
通讯作者：
G. Wright
中科院分区：
文献类型：
--
作者：
G. Wright
有人认为，在恒星历史的早期阶段，磁掐的不稳定性能够有效地破坏磁通量。研究了轴对称磁场在恒星对流稳定区内的稳定性。发现纯极向场对扭结不稳定是不稳定的，而当环向分量足够大时，混合的极向-环向场是稳定的。因此，恒星具有磁性的一个必要条件可能是存在一个足够强大的环面磁场，以防止不稳定。
It is suggested that hydromagnetic ‘pinch’instabilities are capable of efficient magnetic flux destruction in the early stages of a star's history. The stability of an axisymmetric magnetic field in the convectively stable region of a star is investigated. It is found that a purely poloidal field is unstable to the kink instability, but that a mixed poloidal–toroidal field may be stable if the toroidal component is sufficiently large. One condition necessary for a star to be magnetic could therefore be the presence of a toroidal field strong enough to prevent instability.