An equivalent-circuit representation of Alfvén waves

Equivalent electric circuit elements of Alfven waves in solar coronal holes of different temperatures and magnetic field strengths have been studied. In an L-R circuit the resistance is found to increase with magnetic field strength but shows no temperature dependence whereas inductance decreases wi...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 1993-06, Vol.273 (2), p.659-664
Main Authors: NARAIN, U, KUMAR, S
Format: Article
Language:English
Subjects:
Astronomy
Corona. Coronal loops, streamers, and holes
Earth, ocean, space
Exact sciences and technology
Solar physics
Solar system
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Summary:Equivalent electric circuit elements of Alfven waves in solar coronal holes of different temperatures and magnetic field strengths have been studied. In an L-R circuit the resistance is found to increase with magnetic field strength but shows no temperature dependence whereas inductance decreases with magnetic field strength but increases with temperature. As a consequence of this the damping time of the L-R circuit decreases with magnetic field but increases with temperature. The purely resistive load impedance of Alfven waves increases with height in the coronal hole. In case of equivalent transmission line the resistance and inductance increase with temperature but show no magnetic field dependence, whereas capacitance increases with temperature but decreases with the magnetic field strength. (Author)
ISSN:0004-6361
1432-0746