Influence of the magnetic field in the temporal evolution of solar flare X-ray and microwave radiation

Computer Science

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Magnetic Fields, Microwaves, Solar Flares, Solar Radiation, X Rays, Conductive Heat Transfer, Displacement, Solar Atmosphere

Scientific paper

A theoretical development, self-consistent with recent models for the explosive source, is applied to time delays of peak emission at different microwave frequencies, and between microwaves and hard X-ray emission. A working hypothesis is assumed with the adoption of a growing magnetic field during the solar flare explosion, and therefore contributing to a growth in microwave emission, differential in frequency, producing delays of maximum emission towards lower microwave frequencies, and delays of microwave maximum emission with respect to hard X-rays. It is found that these delays are consistent with a growth in the magnetic field of about 14% by assuming both thermal and non-thermal models. This variation in magnetic field is associated to movements of thermal sources downwards in the solar atmosphere, and it is found that the estimated velocities of displacement were consistent compared to characteristic velocities of anomalous conduction fronts of thermal models.

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