Stability of magnetic configurations containing the toroidal and axial fields

被引：31

作者：

Bonanno, A. ^{[1
,2
]}

Urpin, V. ^{[1
,3
]}

机构：

[1] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy

[2] Ist Nazl Fis Nucl, Sezione Catania, I-95123 Catania, Italy

[3] AF Ioffe Phys Tech Inst, Isaac Newton Inst Chile, St Petersburg 194021, Russia

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 477卷 / 01期

关键词：

magnetohydrodynamics (MHD); instabilities; stars : magnetic fields;

D O I：

10.1051/0004-6361:20077476

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Stability properties of magnetic-field configurations containing the toroidal and axial field are considered. The stability is treated by making use of linear analysis. It is shown that the conditions required for the onset of instability are essentially different from those given by the necessary condition d(sB(phi))/ds > 0, where s is the cylindrical radius. The growth rate of instability is calculated for a wide range of the parameters.. We argue that the instability can operate in two different regimes depending on the strength of the axial field and the profile of the toroidal field.

引用

页码：35 / 41

页数：7