scholarly journals Nonlinear excitation of kinetic Alfvén waves and whistler waves by electron beam-driven Langmuir waves in the solar corona

2003 ◽  
Vol 409 (1) ◽  
pp. 331-345 ◽  
Author(s):  
Yu. Voitenko ◽  
M. Goossens ◽  
O. Sirenko ◽  
A. C.-L. Chian
Keyword(s):  
Electron Beam ◽  
Solar Corona ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Whistler Waves ◽  
Nonlinear Excitation ◽  
Langmuir Waves ◽  
Kinetic Alfvén Waves

Potential role of kinetic Alfvén waves and whistler waves in solar wind plasmas

2016 ◽  
Vol 361 (7) ◽  
Author(s):  
P. Nandal ◽  
N. Yadav ◽  
R. P. Sharma ◽  
M. L. Goldstein
Keyword(s):  
Solar Wind ◽  
Potential Role ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Whistler Waves ◽  
Kinetic Alfvén Waves

Landau damped kinetic Alfvén waves and coronal heating

2009 ◽  
Vol 76 (2) ◽  
pp. 239-246 ◽  
Author(s):  
R. P. SHARMA ◽  
SACHIN KUMAR
Keyword(s):  
Solar Corona ◽  
Initial Conditions ◽  
Planck Equation ◽  
Alfven Waves ◽  
Coronal Heating ◽  
Landau Damping ◽  
Alfvén Waves ◽  
Energetic Electrons ◽  
Turbulent Spectra ◽  
Kinetic Alfvén Waves

AbstractSome recent observations of solar corona suggest that the kinetic Alfvén waves (KAWs) turbulence may be responsible for electron acceleration in solar corona and coronal heating. In the present research, we investigate the turbulent spectra of KAW due to filamentation process in the presence of Landau damping and particle energization. We present here the numerical simulation of model equation governing the nonlinear dynamics of the KAW in the presence of Landau damping. When the ponderomotive and Joule heating nonlinearities are incorporated in the KAW dynamics, the power spectra of the turbulent field is evaluated and used for particle heating. Our results reveal the formation of damped coherent magnetic filamentary structures and the turbulent spectra. The effect of Landau damping is to make the turbulent spectra steeper. Two types of scalings k−3.6 and k−4 have been obtained. We have studied the turbulence with different initial conditions. Using the Fokker–Planck equation with the new velocity space diffusion coefficient, we find the distribution function of energetic electrons in these turbulent structures. Landau damped KAWs may be responsible for the acceleration of the energetic electrons in solar corona and coronal heating.

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