Repetition rates of fast pulses in MM-waves/X-ray solar bursts

Details Repetition rates of fast pulses in MM-waves/X-ray solar bursts Repetition rates of fast pulses in MM-waves/X-ray solar bursts

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986stin...8713378c&link_type=abstract

Presented at the 2nd CESRA Workshop, Aubigny, France, Jun. 1986

Physics

Millimeter Waves, Pulsed Radiation, Solar Radio Bursts, Solar X-Rays, Pulse Repetition Rate, Solar Radiation, Time Dependence

Scientific paper

The solar burst of 21 May, 1984, 1326 UT, presented radio spectral emission with turnover frequency above 90 GHz, well correlated in time with hard X-ray emission. It consisted of seven major time structures (1-3 seconds in duration), and each structure consisted of various fast pulses (30-60 ms rise times). The spectral indices between 30-90 GHz, and the power-law indices at hard X-ray exhibited sudden changes for each major time structure. The subsecond pulses are nearly in phase at 30 and 90 GHz, but the relative amplitude of the pulses at 90 GHz (approx. = 50%) were considerably larger than at 30 GHz (less than 5%). It was found that the 90 GHz and the 100 keV X-rays fluxes are proportional to the repetition rates of the subsecond pulses, and that the hard X-rays power law indices harden for higher repetition rates.

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