On ion acoustic turbulence and the nonlinear evolution of kinetic Alfvén waves in aurora

1994 ◽  
Vol 21 (17) ◽  
pp. 1831-1834 ◽  
Author(s):  
J.-E. Wahlund ◽  
P. Louarn ◽  
T. Chust ◽  
H. de Feraudy ◽  
A. Roux ◽  
...  
Keyword(s):  
Nonlinear Evolution ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Ion Acoustic ◽  
Kinetic Alfvén Waves

Nonlinear evolution of kinetic Alfvén waves and the turbulent spectra

2008 ◽  
Vol 15 (8) ◽  
pp. 082902 ◽  
Author(s):  
R. P. Sharma ◽  
Sachin Kumar ◽  
H. D. Singh
Keyword(s):  
Nonlinear Evolution ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Turbulent Spectra ◽  
Kinetic Alfvén Waves

scholarly journals Alfvén waves in space and astrophysical dusty plasmas

2014 ◽  
Vol 21 (2) ◽  
pp. 405-416 ◽  
Author(s):  
V. Jatenco-Pereira ◽  
A. C.-L. Chian ◽  
N. Rubab
Keyword(s):  
Nonlinear Evolution ◽  
Dusty Plasmas ◽  
Alfven Waves ◽  
Space Plasmas ◽  
Alfvén Waves ◽  
Stellar Winds ◽  
Astrophysical Plasmas ◽  
Star Forming ◽  
Star Forming Regions ◽  
Kinetic Alfvén Waves

Abstract. In this paper, we present some results of previous works on Alfvén waves in a dusty plasma in different astrophysical and space regions by taking into account the effect of superthermal particles on the dispersive characteristics. We show that the presence of dust and superthermal particles sensibly modify the dispersion of Alfvén waves. The competition between different damping processes of kinetic Alfvén waves and Alfvén cyclotron waves is analyzed. The nonlinear evolution of Alfvén waves to chaos is reviewed. Finally, we discuss some applications of Alfvén waves in the auroral region of space plasmas, as well as stellar winds and star-forming regions of astrophysical plasmas.

Three-dimensional stability of solitary kinetic Alfvé waves and ion-acoustic waves

1994 ◽  
Vol 51 (1) ◽  
pp. 95-111 ◽  
Author(s):  
G. Ghosh ◽  
K. P. Das
Keyword(s):  
Dimensional Stability ◽  
Acoustic Waves ◽  
Three Dimensional ◽  
Perturbation Expansion ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Ion Acoustic Waves ◽  
Linear Dispersion ◽  
Ion Acoustic ◽  
Kinetic Alfvén Waves

Starting from a set of equations that lead to a linear dispersion relation coupling kinetic Alfvén waves and ion-acoustic waves, three-dimensional KdV equations are derived for these waves. These equations are then used to investigate the three-dimensional stability of solitary kinetic Alfvén waves and ion-acoustic waves by the small-k perturbation expansion method of Rowlands and Infeld. For kinetic Alfvén waves it is found that there is instability if the direction of the plane-wave perturbation lies inside a cone, and the growth rate of the instability attains a maximum when the direction of the perturbation lies in the plane containing the external magnetic field and the direction of propagation of the solitary wave.

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