ON UNSTABLY STRATIFIED TOROIDAL MAGNETIC-FIELDS IN STARS

被引：27

作者：

GOOSSENS, M ^{[1
]}

TAYLER, RJ ^{[1
]}

机构：

[1] UNIV SUSSEX,CTR ASTRON,BRIGHTON BN1 9QH,E SUSSEX,ENGLAND

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1980年 / 193卷 / 03期

关键词：

Axisymmetric - Condition - Displacement field - E-folding - Folding time - Negative values - Solar type stars - Toroidal fields - Toroidal magnetic fields;

D O I：

10.1093/mnras/193.4.833

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A previous discussion of the stability of stars containing an axisymmetric toroidal magnetic field is extended and it is shown that there exist continuous perturbations which give a negative value of (δ) (Wσ) when one of the conditions for stability is violated; this contradicts a conclusion reached by Dicke. The main characteristics of the displacement fields that are associated with the instabilities in the special, but astrophysically relevant, case of a weak toroidal field are indicated. In particular, axisymmetric toroidal magnetic fields with a strength of 100 million G in the cores of solar-type stars produce instabilities with e-folding times of the order of a few hours. © Royal Astronomical Society.

引用

页码：833 / 848

页数：16

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