Waves, Coriolis force, and the dynamo effect

被引：5

作者：

Mahajan, SM ^{[1
]}

Mininni, PD

Gómez, DO

机构：

[1] Univ Texas, Inst Fus Studies, Austin, TX 78712 USA

[2] Natl Ctr Atmospher Res, Adv Study Program, Boulder, CO 80307 USA

[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina

[4] Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 619卷 / 02期

关键词：

galaxies : magnetic fields; magnetic fields; MHD; stars : magnetic fields;

D O I：

10.1086/426533

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Dynamo activity caused by waves in a rotating magnetoplasma is investigated. In astrophysical environments such as accretion disks and at sufficiently small spatial scales, the Hall effect is likely to play an important role. It is shown that a combination of the Coriolis force and Hall effect can produce a finite alpha-effect by generating net helicity at small scales. The shear/ion-cyclotron normal mode of the Hall plasma is the dominant contributor to the dynamo action for short-scale motions.

引用

页码：1014 / 1018

页数：5

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