An approximate self-consistent theory of the magnetic field of fluted penumbrae

被引：0
作者：
Neukirch, T [1 ]
Martens, PCH
机构：
[1] Univ St Andrews, Sch Math & Computat Sci, St Andrews KY16 9SS, Fife, Scotland
[2] NASA, Goddard Space Flight Ctr, ESA, Dept Space Sci, Greenbelt, MD 20771 USA
来源：
ASTRONOMY & ASTROPHYSICS | 1998年 / 332卷 / 03期
关键词：
sunspots; sun : magnetic fields; MHD; methods : analytical;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A self-consistent mathematical description of the magnetic field of fluted sunspot penumbrae is presented. This description is based on an expansion of the nonlinear force-free magnetohydrostatic equations written in cylindrical coordinates. The lowest order solutions are mathematically equivalent to laminated force-free equilibria in Cartesian geometry. The lowest order solutions have no toroidal component of the magnetic field and the magnetic pressure does not vary with azimuth but the solutions allow arbitrary variations of the magnetic field components with azimuth. Explicit solutions are presented which have a realistic radial profile of the magnetic field strength and reproduce the basic features of the observations.
引用
收藏
页码：1075 / 1081
页数：7
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