ON THE RADIO AND X-RAY EMISSION PF SOLAR FLARES

摘要

Data on f min radio emission and solar flares, collected during the IGY and IGC by observatories and stations have been used. The connection between X-ray emission and the emission its Ha of flares is studied statistically. Six intense chromospheric flares (importance 3 and 3) which were not accompanied by X-ray emission were detected and also eight "doubled" flares which generated X-ray emission only in one know or maxi mum.nThe absence of a directivity effect in the X-ray emission of flares is established. It is found that all (type IV bursts of radio emission are accompanied by an appreciable flow of X-ray emission, sufficient for the appearance of a well noticeable (according to f min) additional ionization of the D layer The possibility o£ a unique relation between the presence of X-ray emission of solar flares and type IV bursts of radio emission is discussed briefly. It is proved that several intense ionospheric effects (in the D layer) are due to the X-ray emission from behind-the-limb flares, which are seen from the earth as subflares or not at all. An identical result was obtained in [11] and [121. This fact is apparently evidence that the region of generation of X-ray emission is not limited by the region of flare emission in but extends to heights of several tens of thousands of kilometers into the region of coronal condensations.