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|Type:||Artigo de periódico|
|Title:||Discrete Alfvén Waves In Solar Loop Prominences|
|Author:||De Azevedo C.A.|
De Assis A.S.
|Abstract:||It is shown that a discrete Alfvén wave can explain the natural oscillations of solar loop prominences by considering the existence of a current flow. Discrete Alfvén waves are a new class of Alfvén waves which is described by the inclusion of the finite ion cyclotron frequency (ω/ωcl≠0) and/or the equilibrium plasma current. In this paper we consider only the effect of the current since in solar prominences (ω/ωcl≈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 Alfvén waves as function of the magnitude and shape of the plasma current. © 1991 Kluwer Academic Publishers.|
|Editor:||Kluwer Academic Publishers|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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