Abstract

An extensive analysis is made of the theory of flare stars based on the ‘fast electron hypothesis’, in the light of the latest observational evidence. It is shown that an adequate agreement of theory with the observations obtains regarding the internal regular features in the flare amplitude data inUBV rays, as well as the changes of the colour characteristics of stars during the flares; in the latter case the analysis is made not only in respect of the UV Cet-type stars, but flare stars as well, forming a part of the Orion association. Problems bearing on the ‘negative flare’ and the screening effect are dealt with. New properties of the light curves of flares are revealed, based on the above theory.

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