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Nonlinear Alfvén wave modulation in the solar atmosphere

✍ Scribed by P. K. Shukla; G. Feix

Publisher
Springer
Year
1989
Tongue
English
Weight
431 KB
Volume
123
Category
Article
ISSN
0038-0938

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✦ Synopsis

Nonlinear interaction of finite-amplitude Alfvdn waves with non-resonant finite-frequency electrostatic and stationary electromagnetic perturbations is considered. This interaction is governed by a pair of coupled equations consisting of nonlinear Schr6dinger equation for the Alfv6n wave envelope and an equation for the plasma slow response that is driven by the ponderomotive force of the Alfvdn wave packets. The modulational instability of a constant amplitude Alfv6n pump is investigated and some new results for the growth rate of the instability are presented. It is found that a possible stationary state of the modulated Alfv6n wave packets could lead to localized structures. The relevance of our investigation to the solar atmosphere is discussed.

📜 SIMILAR VOLUMES

Discrete Alfvén waves in solar loop prom
Discrete Alfvén waves in solar loop prominences
✍ Carlos A. Azevedo; Altair S. Assis; Hisataki Shigueoka; Paulo H. Sakanaka 📂 Article 📅 1991 🏛 Springer 🌐 English ⚖ 394 KB

It is shown that a discrete Alfv6n wave can explain the natural oscillations of solar loop prominences by considering the existence of a current flow. Discrete Alfv6n waves are a new class of Alfv6n waves which is described by the inclusion of the finite ion cyclotron frequency (e)/e)~i ~ 0) and/or