1. Institut für Theoretische Physik, Lehrstuhl IV: Weltraum-und Astrophysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany
2. Institute for Physical Science & Technology, University of Maryland, College Park, Maryland 20742, USA
3. School of Space Research, Kyung Hee University, Yongin-Si, Gyeonggi-Do 446-701, Korea
4. Centre for Mathematical Plasma Astrophysics, Celestijnenlaan 200B, 3001 Leuven, Belgium
5. Faculty of Human Development, University of Toyama, 3190, Gofuku, Toyama City, Toyama 930-8555, Japan
6. International Research Fellow of the Japan Society for the Promotion of Science, Tokyo, Japan