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A comment on ‘A comment on the damping of magnetohydrodynamic waves’ by Bibhas R. De

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Abstract

We point out that in the case of sunspots, when Coulomb collisions are included, the reduction in lundqvist number due to anisotropic conductivity is several orders of magnitude less than the reduction estimated by De. This result suggests that, contrary to De's conclusion, sunspot conditions do permit efficient MHD wave propagation.

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References

  • Alfvén, H. and Fälthammar, C.-G.: 1963,Cosmical Electrodynamics, Clarendon Press, Oxford, pp. 100, 179, 180.

    Google Scholar 

  • Dalgarno, A. and Lane, N. F.: 1966,Astrophys. J. 145, 623.

    Google Scholar 

  • De, Bibhas R.: 1976,Astrophys. Space Sci. 39, L43.

    Google Scholar 

  • Mullan, D. J.: 1974,Astrophys. J. 187, 621.

    Google Scholar 

  • Oster, L.: 1968,Solar Phys. 3, 543.

    Google Scholar 

  • Parker, E. N.: 1974,Solar Phys. 36, 249.

    Google Scholar 

  • Rouse, C. S.: 1968,Tables of Ionization Equilibrium Equation of State at Stellar Temperatures and Densities, Naval Res. Lab. Report 6756.

  • Spitzer, L.: 1962,Physics of Fully Ionized Gases, Interscience, New York, p. 133.

    Google Scholar 

  • Wilson, P. R.: 1975,Solar Phys. 42, 333.

    Google Scholar 

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Authors and Affiliations

  1. Bartol Research Foundation of the Franklin Institute, Swarthmore, Pennsylvania, USA

    D. J. Mullan

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  1. D. J. Mullan
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Mullan, D.J. A comment on ‘A comment on the damping of magnetohydrodynamic waves’ by Bibhas R. De. Astrophys Space Sci 44, L9–L11 (1976). https://doi.org/10.1007/BF00650489

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  • DOI: https://doi.org/10.1007/BF00650489

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