Propagation speeds and acoustic damping of waves in magnetic flux tubes |
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| Authors: | H C Spruit |
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| Institution: | (1) Max-Planck-Institut für Physik und Astrophysik, 8046 Garching, F.R.G. |
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| Abstract: | Propagation speeds are derived for the wave modes of a thin magnetic tube in an otherwise homogeneous magnetized or unmagnetized fluid. These results generalize results obtained by previous authors. There are three types of wave, a (torsional) Alfvén wave and two waves which are specific for the thin tube. These are named the longitudinal and transversal tube waves, according to their polarization properties. They can be camped by radiating an MHD or acoustic wave into the surroundings of the tube. Conditions for occurrence of this acoustic damping, and the damping rates, are derived. The behavior of the waves in the solar convection zone and corona is discussed. |
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