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V470 Cas and GSC 2901-00089, Two New Double-mode Cepheids

We present a photometric study of two new double-mode Cepheids, pulsating in the first and second overtones modes: V470 Cas and GSC 2901-00089. For the search of the double-mode variability, we used all available observations from the ROTSE-I/NSVS and SuperWASP online public archives. Our multicolour CCD observations in the B, V and R bands in Johnson's system confirm the double periodicity of these variables. We study period variations of the two stars; variations of the first overtone periods were reliably detected. In addition, we consider the Petersen diagram for the Galactic 1O/2O Cepheids.

preprint2016arXivOpen access
A. V. KhruslovA. V. Kusakin
astro-ph.SR
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A. V. KhruslovA. V. Kusakin

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