A shallow-water theory for the sun's active longitudes

被引：53

作者：

Dikpati, M ^{[1
]}

Gilman, PA ^{[1
]}

机构：

[1] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80301 USA

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 635卷 / 02期

关键词：

instabilities; sun : activity; sun : evolution; sun : magnetic fields; sunspots;

D O I：

10.1086/499626

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the global MHD shallow-water instability of differential rotation and toroidal field bands in the solar tachocline provides a possible mechanism for the formation and evolution of active longitudes seen in synoptic maps of photospheric magnetic fields. The mechanism involves the production of upward bulges at selected longitudes in the overshoot tachocline that contain significant toroidal fields.

引用

页码：L193 / L196

页数：4

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