Fig. 5.
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Preliminary pulsational radial velocity curves for five binary double Cepheids with the best-covered pulsation cycles. For each system, RVs for both Cepheid components (A and B) are shown. The solid line is a Fourier series fit to the data (third to fifth order for F mode and second order for the 1O Cepheid). The span of the Y-axis is the same for all panels.
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