Physics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..131..119d&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 131, Jan. 1991, p. 119-127. Research supported by CAPES, CNPq, and FAPESP.
Physics
5
Coronal Loops, Ion Cyclotron Radiation, Magnetohydrodynamic Waves, Plasma Currents, Solar Prominences, Cylindrical Plasmas, Magnetic Fields, Tokamak Devices
Scientific paper
It is shown that a discrete Alfven wave can be used to explain the natural oscillations of the 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 a finite ion cyclotron frequenccy and/or the equilibrium plasma current. In this paper, only the effect of the current is considered. The solar prominences have been modeled as a cylindrical plasma surrounded by vacuum (corona), with L being much greater than a where L and a are the plasma column length and radius, respectively. The spectrum of the discrete Alfven waves has also been calculated as a function of the magnitude and the shape of the plasma current.
de Assis Altair S.
de Azevedo Carlos A.
Sakanaka Paulo H.
Shigueoka Hisataki
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