ACCRETION;
ACCRETION DISKS;
MHD;
SUN;
MAGNETIC FIELDS;
GALAXIES;
D O I:
10.1093/mnras/267.1.146
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
A general theorem on force-free fields is proved and applied to highly wound field configurations. In axial symmetry such configurations expand along a cone of semi-angle 60-degrees as the system is wound up. The self-similar field structure is determined. After 1/square-root 3 turns the system reaches flashpoint with a discharge around this cone releasing toroidal flux loops to infinity. All poloidal flux then visits infinity.