Why Does the Sun's Torsional Oscillation Begin before the Sunspot Cycle?

被引：26

作者：

Chakraborty, Sagar ^{[1
]}

Choudhuri, Arnab Rai ^{[2
]}

Chatterjee, Piyali ^{[2
]}

机构：

[1] SN Bose Ctr Basic Sci, Dept Theoret Sci, Kolkata 700098, India

[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 04期

关键词：

SOLAR CONVECTION-ZONE; MERIDIONAL CIRCULATION; DYNAMO MODEL; DIFFERENTIAL ROTATION; FLUX TUBES; FLOWS; PENETRATION; SURFACE; REGIONS; FORCE;

D O I：

10.1103/PhysRevLett.102.041102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Although the Sun's torsional oscillation is believed to be driven by the Lorentz force associated with the sunspot cycle, this oscillation begins 2-3 yr before the sunspot cycle. We provide a theoretical explanation of this with the help of a solar dynamo model having a meridional circulation penetrating slightly below the bottom of the convection zone, because only in such dynamo models does the strong toroidal field form a few years before the sunspot cycle and at a higher latitude.

引用

页数：4

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