Magnetic Field Disturbance Produced by a Super-Sonic Toroidal Magnetic Cloud
Abstract
Magnetic clouds are commonly interpreted as manifestations of large interplanetary magnetic flux ropes. The flux ropes have a loop like shape, i.e., they are curved, and they are approximated by a toroidal shape in the present work. Magnetic clouds near Earth have impacts on geomagnetic activity, the strongest influence on the magnetosphere is usually caused by very fast, super-sonic clouds. To find a bow shock surface and magnetic field structure in the area between the bow shock and the cloud's boundary is a difficult task. Our approach to the problem is to set a priori a bow shock surface, which is determined by a number of parameters to be found when interpreting a given event. Then magnetic field is constructed from the following constrains: the normal component is continuous across the bow shock and absent on the boundary. Additionally, there is also a co-planarity condition to be fulfilled on the boundary. We shall show example calculations and interpretations.
- Publication:
-
American Astronomical Society Meeting Abstracts #216
- Pub Date:
- May 2010
- Bibcode:
- 2010AAS...21640608V