 |
| Titel |
Dissipation and wave-ion interaction in the solar wind: Links between fluid and kinetic theory |
| VerfasserIn |
E. Marsch |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 6, no. 3/4 ; Nr. 6, no. 3/4, S.149-160 |
| Datensatznummer |
250003219
|
| Publikation (Nr.) |
 copernicus.org/npg-6-149-1999.pdf |
|
|
|
|
|
| Zusammenfassung |
| In this paper we
establish links between turbulence dissipation and wave-particle interactions in
the solar corona and wind. Based on quasilinear theory, a set of anisotropic,
multi-component fluid equations is derived, which describe the wave-particle
interactions of ions with Alfvén waves and ion-cyclotron waves or magnetosonic
waves propagating along the mean magnetic field. The associated equations for
the wave spectrum and the heating and acceleration of the ions are derived. In
fast solar wind streams heavy ions have about equal thermal speeds as the
protons and flow faster than them. In order to explain the observed relations, Tj
/ Tp ≈ mj /mp and Uj
Up ≈ VA, a numerical fluid-type model is developed, which takes into account the relevant
wave-particle interactions. It is shown that left- and right-handed polarized
waves propagating away from the Sun parallel to the interplanetary magnetic
field can resonantly heat and accelerate minor ions preferentially with respect
to the protons in close agreement with the measured characteristics of ion
velocity distributions. Finally, some results from a simple analytical model are
discussed. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|