THE INFLUENCE OF THE LOCAL INTERSTELLAR MEDIUM ON THE SOLAR WIND DYNAMICS IN THE INNER HELIOSPHERE |
| |
Authors: | HANS-JÖRG Fahr HORST Fichtner KLAUS Scherer |
| |
Institution: | (1) Institut für Astrophysik and Extraterrestrische Forschung der Universität Bonn, Auf dem Hugel 71, D-53121 Bonn, Germany;(2) Institute for Physical Science and Technology, University of Maryland, College Park, Maryland, 20742–2431, U.S.A;(3) MS 301/230, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, California, 91109, U.S.A |
| |
Abstract: | The consequences of the interaction between the solar wind and the local interstellar medium for the wind region enclosed by the heliospheric shock are reviewed. After identifying the principal mechanisms to influence the dynamics of the solar wind, an approach allowing the simultaneous incorporation of neutral atoms, pick-up ions, cosmic rays and energetic electrons into a multifluid model of the expanding wind plasma is outlined. The effects of these particle species are discussed in detail, with special emphasis on the electron component which behaves more like a quasi-static hot gas rather than an expanding fluid. This electron gas is effectively trapped within a three-dimensional trough of a circumsolar electric potential whose outer fringes are possibly determined by the density distribution of anomalous cosmic rays. The electrons are proven to be a globally structered component of great importance for the solar wind momentum flow contributing to a triggering of the solar wind dynamics by asymmetric interstellar boundary conditions. Finally, the consequences for the relative motion of the Sun and the local interstellar medium as well as for the solar system as a whole are described. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|