Abstract
The properties of such phenomena as the appearance of humps at the ascending branch or double peaks in the light curve of long-period pulsating stars are examined. The characteristics of humps and the average light curves are obtained for a group of Mira-type stars and semiregular (SRa) variable stars. Correlations between the parameters of the light curves and the characteristics of the humps for these stars are discussed. The results obtained here are compared with published theoretical models.
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