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Period Variation of the Pop.II Cepheid AU Peg
Published online by Cambridge University Press: 15 February 2018
Abstract
AU Peg, a short period BL Her-type variable, is unique among short period Cepheids. It is a member of a close binary system with an unseen companion. In t his paper the pulsational period variation is presented. It is shown that the period variation is very rapid and highly non-linear. It seems that there is no simple explanation of this phenomena by standard evolution or tidal interaction.
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