A study of solar preflare activity using two-dimensional radio and SMM-XRP observations

Details A study of solar preflare activity using two-dimensional radio and SMM-XRP observations A study of solar preflare activity using two-dimensional radio and SMM-XRP observations

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..114..273k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 114, no. 2, 1987, p. 273-288. Research supported by the Lockheed Independent Research Progr

Astronomy and Astrophysics

Astronomy

6

Radio Astronomy, Solar Flares, Solar Maximum Mission, Solar Spectra, Centimeter Waves, Type 3 Bursts, Very Large Array (Vla), X Rays

Scientific paper

The authors present a study of type III activity at meter-decameter wavelengths in the preflare phase of the 1986 February 3 flare using data obtained with the Clark Lake Multifrequency Radioheliograph. They compare this activity with similar type III burst activity during the impulsive phase and find that there is a displacement of burst sources between the onset and end times of the activity. A comparison of this displacement at three frequencies suggests that the type III emitting electrons gain access progressively to diverging and different field lines relative to the initial field lines. The energetics of the type III emitting electrons are inferred from observations and compared with those of the associated hard X-ray emitting electrons. The soft X-ray data from SMM-XRP shows enhanced emission measure, density and temperature in the region associated with the preflare type III activity.

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