NDLI: Nonlinear Dynamics of Kinetic Alfvén and Whistler Waves in the Solar Wind

Content Provider	Springer Nature Link
Author	Rai, Rajesh Kumar Sharma, Swati Sharma, R. P.
Copyright Year	2017
Abstract	In this article we investigate the nonlinear dynamics of 3D kinetic Alfvén waves (KAWs) and quasi-transverse weak whistler waves in a magnetized plasma. We have studied the problem numerically to examine the transient evolution of localized structures of 3D KAWs and whistler waves. The nonlinearity arises as a result of ponderomotive effects associated with 3D KAWs; consequently, the background density modifies. The weak whistler waves propagating in this modified density are localized and amplified. To improve our insight into the basic physics behind the formation of these localized structures, we have also solved the system semi-analytically. The power spectra show a Kolmogorov scaling (with a power of $-5/3$ ) in the inertial range that lies above the ion gyroradius. Below this scale, dispersive effects start to appear, and the power spectrum follows a steeper scaling (−2 to −4). Our results show the important role that KAWs and whistler waves play in the energy cascading from larger to smaller scales. The results are consistent with the solar wind observations by the Cluster spacecraft.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	292
Issue Number	3
e-ISSN	1573093X
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-03-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Kinetic Alfvén waves Whistler waves Localized structures Solar wind Astrophysics and Astroparticles Atmospheric Sciences Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics)
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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