ROTATION AND STABILITY OF THE TOROIDAL MAGNETIC FIELD IN STELLAR RADIATION ZONES

被引：9
|
作者：
Bonanno, Alfio [1 ,2 ]
Urpin, Vadim [1 ,3 ,4 ]
机构：
[1] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy
[2] Ist Nazl Fis Nucl, Sez Catania, I-95123 Catania, Italy
[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[4] Isaac Newton Inst Chile, Branch St Petersburg, St Petersburg 194021, Russia
来源：
ASTROPHYSICAL JOURNAL | 2013年 / 766卷 / 01期
关键词：
instabilities; magnetohydrodynamics (MHD); stars: magnetic field; Sun: interior; PROTONEUTRON STAR DYNAMOS; ADIABATIC STABILITY; INSTABILITY; CONVECTION; INTERIORS; BUOYANCY; PULSARS;
D O I：
10.1088/0004-637X/766/1/52
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The stability of the magnetic field in radiation zones is of crucial importance for mixing and angular momentum transport in the stellar interior. We consider the stability properties of stars containing a predominant toroidal field in spherical geometry by means of a linear stability in the Boussinesq approximation taking into account the effect of thermal conductivity. We calculate the growth rate of instability and analyze in detail the effects of stable stratification and heat transport. We argue that the stabilizing influence of gravity can never entirely suppress the instability caused by electric currents in radiation zones. However, the stable stratification can essentially decrease the growth rate of instability.
引用
收藏
页数：9
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