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- W4385846168 abstract "It is shown that the Discrete Alfvén wave can explain the natural oscillations of solar 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 finite ion cyclotron frequency (ω/ω ci ≠ 0) and/or the equilibrium plasma current. In this paper we consider only the current effect since in prominences ω/ω ci ≈ 0 . We have modeled the prominences as a cylindrical plasma, surrounded by an ideally conducting wall (corona), with L >> a where L and a are the plasma column length and radius, respectively. We have shown the spectrum of the discrete Alfvén waves as a function of the plasma current. ONDAS DE ALFVÉN DISCRETAS EM PROEMINÊNCIAS SOLARES: ESTUDOS PRELIMINARES É mostrado que a onda de Alfvén discreta pode explicar as oscilações naturais das proeminências solares ao considerar a existência de uma corrente. Ondas de Alfvén discretas são uma nova classe das ondas de Alfvén que é descrita pela inclusão da frequência ciclotrônica de fon (ω/ω ci ≠ 0) e/ou devido a corrente de plasma. Neste trabalho consideramos somente o efeito da corrente desde que em proeminências ω/ω ci ≈ 0. O modelo utilizado para proeminência é um plasma cilíndrico limitado por um a parede condutora (corona) com L >> a, onde L e a são, respectivamente, comprimento e raio da coluna de plasma. Mostramos que o espectro das ondas de Alfvén discretas é uma função da corrente de plasma." @default.
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- W4385846168 date "2018-07-18" @default.
- W4385846168 modified "2023-10-06" @default.
- W4385846168 title "Discrete Alfvén Waves in Solar Prominences: Preliminary Studies" @default.
- W4385846168 doi "https://doi.org/10.22564/brjg.v8i1-2.1087" @default.
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