Comparison of Force-Free Flux Rope Models with Observations of Magnetic Clouds
Abstract
In recent years we have found force-free solutions inside an elliptic cylinder (A&A, 2002) and inside a toroid (GRL, 2003) for magnetic cloud models. The solutions tend to the widely used Lundquist constant-alpha force-free solution inside a circular cylinder in their appropriate limits. The both solutions may include effects of a flux rope expansion. Comparisons of these solutions and the Lundquist solution with magnetic cloud observations will be done for a larger set of magnetic clouds and it will be investigated, how oblateness and curvature of flux ropes, in addition to expansion, can improve model fits. We shall also examine, how the modelled flux rope expansion is consistent with three dimensional plasma flows inside observed magnetic clouds.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.2160V