Quasi-potential-singular-equilibria and evolution of the coronal magnetic field due to photospheric boundary motions
Abstract
Novel general properties are presented of configurations in a class of 2D, x-invariant magnetostatic equilibria, showing that the general condition of equilibrium at the extremities of the current sheet implies a heretofore unsuspected constraint on the magnetic field. Attention is given to situations in which singular states are obtained asymptotically by means of an arcadelike, x-invariant force-free field that is indefinitely sheared. A method is given for the analytical computation of such asymptotic states, as the solutions of boundary-value problems.
- Publication:
-
Geophysical Monograph Series
- Pub Date:
- 1990
- DOI:
- 10.1029/GM058p0245
- Bibcode:
- 1990GMS....58..245A
- Keywords:
-
- Current Sheets;
- Photosphere;
- Solar Corona;
- Solar Magnetic Field;
- Solar Physics;
- Conformal Mapping;
- Equilibrium;
- Magnetostatics;
- Shear Layers;
- Variational Principles