CURRENT SHEET FORMATION AND RAPID RECONNECTION IN THE SOLAR CORONA

被引：21

作者：

BHATTACHARJEE, A

WANG, XG

机构：

[1] Department of Applied Physics, Columbia University, New York, NY 10027

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 372卷 / 01期

关键词：

HYDROMAGNETICS; MAGNETIC FIELDS; SUN; CORONA;

D O I：

10.1086/169978

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is shown that a current sheet is formed in Parker's model of the solar corona from the requirement that magnetic helicity is conserved in the presence of a very small but finite plasma resistivity. The presence of dissipation permits slippage of field lines with respect to the plasma, and hence a current sheet can be formed in the presence of smooth photospheric flows. The structure of the current sheet encompasses a thin strip spanning two Y-points. It is shown that the rapid reconnection involved in the formation of the current sheet justifies the use of helicity conservation. Implications for coronal heating and numerical simulations of the corona are discussed.

引用

页码：321 / 328

页数：8

共 34 条

[1] RIGOROUS NEW LIMITS ON MAGNETIC HELICITY DISSIPATION IN THE SOLAR CORONA [J].