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|Type:||Artigo de periódico|
|Title:||DISCRETE-ALFVEN WAVES IN SOLAR LOOP PROMINENCES|
|Abstract:||It is shown that a discrete Alfven wave can explain the natural oscillations of solar loop prominences by considering the existence of a current flow. Discrete Alfven waves are a new class of Alfven waves which is described by the inclusion of the finite ion cyclotron frequency (omega/omega-ci # 0) and/or the equilibrium plasma current. In this paper we consider only the effect of the current since in solar prominences omega/omega-ci almost-equal-to 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 Alfven waves as function of the magnitude and shape of the plasma current.|
|Editor:||Kluwer Academic Publ|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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