The relative timing of microwaves and hard X-rays in solar flares

Details The relative timing of microwaves and hard X-rays in solar flares The relative timing of microwaves and hard X-rays in solar flares

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..875c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 15, 1984, p. 875-881.

Astronomy and Astrophysics

Astrophysics

48

Microwave Emission, Particle Acceleration, Solar Flares, Solar Radio Emission, Solar X-Rays, Correlation, Solar Maximum Mission

Scientific paper

The timing of impulsive microwave and hard X-ray emission in solar flares with sub-second precision was compared. In flares demonstrating time structure on a scale less than approximately 1 s, 10.6 GHz microwaves were delayed with respect to hard X-rays by about 0.2 s. The delay varied from flare to flare and also within flares. No significant correlation was shown between the observed time delays and the peak X-ray or microwave flux or their ratio. Discussion included the electron propagation time from the top to the bottom of the loop, differential light travel time caused by the possible varying locations of the X-ray and microwave sources and the possible contamination of the microwave spikes with approximately 2 x 10 to the 7th K thermal emission.

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