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Evidence for Small, Short-term Period Change in RZ Draconis

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Anthony D. Mallama

Ritter Astrophysical Research Center, The University of Toledo, Toledo, Ohio

Abstract

An intensive series of timings of minima reveals a quasi-periodic O-C curve. Explanations in terms of a third body or apsidal motion seem unlikely, and mass exchange may be the cause. The importance of timing the secondary minima is stressed.