Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9828577 | Planetary and Space Science | 2005 | 6 Pages |
Abstract
There is a growing evidence that cross-sections of magnetic clouds (interplanetary magnetic flux ropes) have oblate shapes. This follows from theoretical results as well as from interpretation of in situ measurements. MHD simulations show that a leading part of a cloud, an apex, has an oblate cross-section, and this may be very extreme in some cases. Interpretations of magnetic cloud observations by non-force-free models, multispacecraft observations, and analyses of the cloud bow shock stand-off distance also indicate that a cross-section of some magnetic clouds is oblate. Recently we have found a force-free solution with constant alpha in an elliptic cylinder. It is a direct generalization of the widely used Lundquist constant-alpha force-free solution inside a circular cylinder. Comparisons of this solution and the Lundquist solution with observations are shown.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
M. Vandas, E. Romashets, S. Watari,