We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Numerical simulations to study kinetic Alfvén wave and whistler wave spectra in solar wind plasma.
- Authors
Dwivedi, Navin; Sharma, R.; Batra, Karuna
- Abstract
The numerical simulations of the model equation governing the nonlinear evolution of kinetic Alfvén wave (KAW) in solar wind plasmas are performed. The nonlinear dynamical equation of KAW satisfies the modified nonlinear Schrödinger MNLS equation when the ponderomotive nonlinearity is incorporated in the KAW dynamics. The effect of Landau damping is taken into account in the KAW dynamics. The coherent (in the absence of Landau damping) and damped (with Landau damping) localized structures of pump KAW as a consequence of ponderomotive nonlinearity have been studied in the solar wind at 1 AU. A weak whistler signal propagating in these localized structures is amplified which leads to the development of its own coherent and damped localized structures. Magnetic field (KAW) and electric field (whistler wave) power spectra and their spectral indices are calculated. Our results reveal the change in spectral index because of the damping effect which has good agreement with the observations. These damped structures and steeper spectra may be one of the reasons responsible for the plasma heating and particles acceleration in solar wind.
- Subjects
COMPUTER simulation; SOLAR wind; PLASMA spectroscopy; ASTRONOMICAL models; SCHRODINGER equation; LANDAU damping; PONDEROMOTIVE force; NONLINEAR dynamical systems; PARTICLE acceleration
- Publication
Astrophysics & Space Science, 2013, Vol 343, Issue 1, p19
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-012-1226-z