Chromospheric Flares and 210 MHz Radio Emission

This is a study of the development of sixteen chromospheric flares observed at the Abastumani Astrophysical Observatory in 1973. Hα filtergrams and radio bursts at a frequency of 210 MHz (λ=1.43 m) are examined. The Hα filtergrams were obtained using a chromosphere-photosphere telescope with the aid of an interference polarization filter and the radio bursts were detected using the radio telescope at the Abastumani Observatory. The main purpose of this work is to detect radio signals associated with the flares. In most cases the area of the flare and its intensity reached their maxima almost simultaneously. As for the peak energy release, in most cases it reached a maximum at almost the same time or slightly earlier in the meter radio wavelength band than in the Hα line. The sequence of events in the optical and radio bands during the flares is obtained by using the method of epoch superposition.