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Maximum temperatures for radiation from plasma waves

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Abstract

We derive upper limits to the radiation temperaturesT t(k) for emission near the fundamental and second harmonic of the electron plasma frequency in terms of the effective temperature for plasma wavesT l(k′). We findT t(k)≲(c/(3)1/2 V e)3 T l(k′) for emission near the fundamental which differs from the result of Melrose (1970b) by the factor in parentheses. This factor can exceed 4×104 in some plasmas. The conditions under which this limit could be reached are delinated. For emission near the second harmonicT t(k)≤T l(k′) since the absorption coefficient in this case can only be positive.

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References

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Authors and Affiliations

  1. High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colo., U.S.A.

    D. F. Smith

  2. Institute for Plasma Research, Stanford University, Stanford, Calif., U.S.A.

    P. A. Sturrock

Authors
  1. D. F. Smith
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  2. P. A. Sturrock
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The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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Smith, D.F., Sturrock, P.A. Maximum temperatures for radiation from plasma waves. Astrophys Space Sci 12, 411–414 (1971). https://doi.org/10.1007/BF00651429

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  • DOI: https://doi.org/10.1007/BF00651429

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