The state of nonlinear force-free magnetic field extrapolation

被引：5
作者：
Wheatland, M. S. [1 ]
Gilchrist, S. A. [1 ]
机构：
[1] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia
来源：
ECLIPSE ON THE CORAL SEA: CYCLE 24 ASCENDING (GONG 2012, LWS/SDO-5, AND SOHO 27) | 2013年 / 440卷
关键词：
SOLAR ACTIVE-REGION; OPTIMIZATION APPROACH; AMBIGUITY; FLARE;
D O I：
10.1088/1742-6596/440/1/012037
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Magnetic field extrapolation is the construction of a model solution for the coronal magnetic field in active regions from magnetic boundary data originating close to the Sun's surface. The nonlinear force-free model (in which the electric current density is parallel to the magnetic field) is often adopted to describe the coronal field. The solution of the nonlinear force-free equations is a challenging computational task, and the application of codes to available boundary data has revealed a number of significant problems with nonlinear force-free extrapolation. This paper summarises the present status of coronal field extrapolation, and describes some recent developments.
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页数：10
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