An observational study of the 2B/X2.8 flare of 30 March, 1982 in optical, radio, and X-ray ranges

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H Alpha Line, Solar Flares, Solar Radio Bursts, Solar X-Rays, Visual Observation, Electron Acceleration, Electron Energy, Flux Density, High Temperature Plasmas, Plasma Heating, Solar Maximum Mission

Scientific paper

The 2B/X2.8 double-ribbon flare of 30 March, 1982 is investigated using Hα, white light, X-rays and microwaves. The X-ray burst seems to consist of two components, i.e., an impulsive component showing a long chain of peaks and a thermal component (T ≡ 2×107K). A peak of one-directional intensity distribution at 35 GHz always lies on the core of the hard X-ray source, showing a shift of the position synchronous with the hard X-ray core. This may imply a common source for the radio waves and the hard X-rays. The source of the thermal component observed at the soft X-rays (7 - 14 keV) after the early phase covers a whole Hα patch. This may imply a physical relation between the thermal X-ray loops and the Hα brightening.

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