A Limit on Energetic Electrons in the Solar Corona from Radio Observations

Details A Limit on Energetic Electrons in the Solar Corona from Radio Observations A Limit on Energetic Electrons in the Solar Corona from Radio Observations

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spd....31.0223h&link_type=abstract

American Astronomical Society, SPD Meeting #31, #02.23; Bulletin of the American Astronomical Society, Vol. 32, p.815

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Scientific paper

It has been suggested that the electron distribution in the solar corona may be well represented by a ``kappa'' distribution function (Owocki & Scudder 1983, ApJ 270, 758; Scudder 1992, ApJ 398, 319). The kappa distribution, which approaches a Maxwellian as kappa approaches infinity, simulates a thermal core with a power-law tail of energetic particles. I derive a relativistic generalization of the kappa distribution function and compute the gyrosynchrotron radio emission from it for typical non-flaring active region conditions. I find that the computed radio brightness temperature exceeds observations for all values of kappa less than ~10. The gyrosynchrotron code used for these computations will be available as part of the modeling package being developed for the HESSI project. This work is supported in part by the NASA Sun-Earth Connection SR&T Program in Solar Physics.

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