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Discrete Alfvén waves in solar loop prominences

✍ Scribed by Carlos A. Azevedo; Altair S. Assis; Hisataki Shigueoka; Paulo H. Sakanaka

Publisher
Springer
Year
1991
Tongue
English
Weight
394 KB
Volume
131
Category
Article
ISSN
0038-0938

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✦ Synopsis

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 the equilibrium plasma current. In this paper we consider only the effect of the current since in solar prominences o)/o)ci ~ 0. We have modeled the solar prominences as a cylindrical plasma, surrounded by vacuum (corona), with L >> a where L and a are the plasma column, length, and radius, respectively. We have calculated the spectrum of the discrete Alfv6n waves as function of the magnitude and shape of the plasma current.

📜 SIMILAR VOLUMES

Coronal loop heating by discrete Alfvén
Coronal loop heating by discrete Alfvén waves
✍ C. A. Azevedo; A. S. Assis; H. Shigueoka; P. H. Sakanaka 📂 Article 📅 1991 🏛 Springer 🌐 English ⚖ 403 KB

We have modeled the solar coronal active loop heating by discrete Alfv6n waves. Discrete Alfv~n waves (DAW) are a new class of Alfv6n waves which can be described by the two-fluid model with finite ion-cyclotron frequency, or the MHD model with plasma current along the magnetic field line as shown b