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Coronal loop heating by discrete Alfvén waves

✍ Scribed by C. A. Azevedo; A. S. Assis; H. Shigueoka; P. H. Sakanaka

Publisher
Springer
Year
1991
Tongue
English
Weight
403 KB
Volume
136
Category
Article
ISSN
0038-0938

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✦ Synopsis

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 by Appert, Vaclavik, and Villar (1984). We have modeled the coronal loop as a semi-toroidal plasma with the major toroidal radius much larger than the plasma radius. We have shown that the absorption of discrete Alfv6n waves by the plasma through viscosity can account for at least 30% of the coronal heating rate density ofl0 nJm 3s ~.

📜 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