Effects of Plasma Mass Flow on Alfven Wave Phase Mixing in Coronal Loops

  1. C. T. Russell,
  2. E. R. Priest and
  3. L. C. Lee
  1. M. Peredo and
  2. J. A. Tataronis

Published Online: 21 MAR 2013

DOI: 10.1029/GM058p0289

Physics of Magnetic Flux Ropes

Physics of Magnetic Flux Ropes

How to Cite

Peredo, M. and Tataronis, J. A. (1990) Effects of Plasma Mass Flow on Alfven Wave Phase Mixing in Coronal Loops, in Physics of Magnetic Flux Ropes (eds C. T. Russell, E. R. Priest and L. C. Lee), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM058p0289

Author Information

  1. University of Wisconsin-Madison, Madison, WI 53706

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780875900261

Online ISBN: 9781118663868

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Keywords:

  • Solar photosphere;
  • Magnetic flux;
  • Astrophysics

Summary

Ground-based and space observations suggest that flow phenomena are intrinsic to the solar corona loops. The present analysis addresses flow effects on Alfvén wave behavior in coronal loops. Specifically, we investigate the effect of flow on the shear Alfvén wave continuum and the associated damping process resulting from phase-mixing. Flow Doppler-shifts the Alfvén wave continuum, thus displacing the range of frequencies for optimum heating. The present study explores Alfven resonance effects on surface waves propagating along coronal loops that are under the influence of flow. Coupling to the Alfvén resonance leads to damping of the surface waves. We compute the damping rate in the presence of sub-Alfvénic flows. Flow increases the damping rate of certain modes, thus enhancing the heating effectiveness of those modes. Therefore, our calculations suggest that flow is potentially an important ingredient for an accurate evaluation of heating the solar corona by dissipation of Alfvén waves via phase-mixing.