Available formats:
HTML |
PDF |
(gzipped) PostScript## Competition of damping mechanisms for the phase-mixed Alfvén waves in the solar corona
^{1} Centre for Plasma Astrophysics, K.U.Leuven, Belgium (Yuriy.Voitenko@wis.kuleuven.ac.be)^{2} Main Astronomical Observatory, Kyiv, Ukraine
The competition of the linear and nonlinear damping mechanisms for
phase-mixed Alfvén waves in the solar corona is studied. It is
shown that the nonlinear damping of the phase-mixed Alfvén
waves due to their parametric decay is stronger than both collisional
and Landau damping for waves with frequencies below a critical
frequency which depends on the wave amplitude. This critical frequency
is close to the cyclotron frequency
( s These effects are introduced by the vector nonlinearity which involves waves propagating in the different directions across magnetic field. The effects introduced by the scalar nonlinearity may also become important in phase mixing (Voitenko & Goossens, in preparation).
Online publication: June 5, 2000 |