Observational clues to the energy release process in impulsive solar bursts

Details Observational clues to the energy release process in impulsive solar bursts Observational clues to the energy release process in impulsive solar bursts

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..131b&link_type=abstract

(NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988) Astrophysical Jou

Astronomy and Astrophysics

Astronomy

6

Solar Energy, Solar Radio Bursts, Solar X-Rays, Energy Dissipation, Energy Transfer, Microwaves, Particle Acceleration, Shock Waves, Thermal Conductivity, Transport Properties, X Ray Astronomy, X Ray Spectra

Scientific paper

The nature of the energy release process that produces impulsive bursts of hard X-rays and microwaves during solar flares is discussed, based on new evidence obtained using the method of Crannell et al. (1978). It is shown that the hard X-ray spectral index gamma is negatively correlated with the microwave peak frequency, suggesting a common source for the microwaves and X-rays. The thermal and nonthermal models are compared. It is found that the most straightforward explanations for burst time behavior are shock-wave particle acceleration in the nonthermal model and thermal conduction fronts in the thermal model.

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