Deformation of magnetic cloud (MC) boundaries
Abstract
We perform an analysis of the deformation of the front MC boundaries. We estimate the boundary normals using different approaches: 1) geometrical estimation of the boundary normal using analytical models (circular and elliptic); 2) calculation of the boundary normal using magnetic field data close to the boundary (vector cross-product and MVA). Significant differences between the expected and measured normals are generally observed. We discuss these differences in terms of MC flattening during propagation and the possible occurrence of the Kelvin-Helmholtz instability at the boundary (i.e., akin to the case of Earth's magnetosphere). This work was performed in part in the context of the HELIO project.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSH31A2204L
- Keywords:
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- 2101 INTERPLANETARY PHYSICS / Coronal mass ejections;
- 2111 INTERPLANETARY PHYSICS / Ejecta;
- driver gases;
- and magnetic clouds;
- 7513 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Coronal mass ejections