Dynamo action in Hall magnetohydrodynamics

被引：63

作者：

Mininni, PD

Gómez, DO

Mahajan, SM

机构：

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

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

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

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 567卷 / 01期

关键词：

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

D O I：

10.1086/339850

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the generally neglected Hall term in the equations for two-fluid magnetohydrodynamics may have a profound effect on alpha-dynamo action. The new calculation, in addition to subsuming the standard results from the mean field approach, contains a contribution to the alpha-coefficient entirely due to the Hall current in the microscale.

引用

页码：L81 / L83

页数：3

共 12 条

[1] Resolution of an ambiguity in dynamo theory and its consequences for back-reaction studies [J].