Height structure of thermal hard X-ray sources on the sun

Details Height structure of thermal hard X-ray sources on the sun Height structure of thermal hard X-ray sources on the sun

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...73..121b&link_type=abstract

Solar Physics, vol. 73, Sept. 1981, p. 121-132.

Physics

18

Bremsstrahlung, Solar Atmosphere, Vertical Distribution, X Ray Sources, Atmospheric Models, Chromosphere, Kernel Functions, Solar Maximum Mission

Scientific paper

Hard X-ray bremsstrahlung height distribution is predicted for dissipative thermal models involving the rapid heating of many small tearing mode islands near the top of a solar magnetic arch. Emission at low energies originates mainly at high altitudes in the heated kernels themselves, while high energy emission comes from the Maxwellian tail electrons escaping to the chromosphere. It is argued that for a power-law distribution of kernel production temperatures, the ratio of high to low altitude emissions should vary as the negative second power of the emission energy. The small kernel size needed to explain the weakness of the coronal emission, however, demands the heating of 8 x 10 to the 36th electrons/sec to temperatures above 5 keV.

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