Correlated fast time structures at millimeter waves and hard X-rays during a solar burst

Details Correlated fast time structures at millimeter waves and hard X-rays during a solar burst Correlated fast time structures at millimeter waves and hard X-rays during a solar burst

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000soph..197..361k&link_type=abstract

Solar Physics, v. 197, Issue 2, p. 361-374 (2000).

Physics

6

Scientific paper

We present an analysis of the time profiles detected during a solar impulsive flare, observed at one-millimeter radio frequency (48 GHz) and in three hard X-ray energy bands (25-62, 62-111, and 111-325 keV) with high sensitivity and time resolution. The time profiles of all emissions exhibit fast time structures of 200-300 ms half power duration which appear in excess of a slower component varying on a typical time scale of 10 s. The amplitudes of both the slow and fast variations observed at 48 GHz are not proportional to those measured in the three hard X-ray energy bands. However, the fast time structures detected in both domains are well correlated and occur simultaneously within 64 ms, the time resolution of the hard X-ray data. In the context of a time-of-flight flare model, our results put strong constraints on the acceleration time scales of electrons to MeV energies.

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