V470 Cas and GSC 02901–00089, Two New Double-mode Cepheidsстатья
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Дата последнего поиска статьи во внешних источниках: 10 июня 2020 г.
Аннотация:We present a photometric study of two new double-mode Cepheids, pulsating in the first and second overtones modes: V470 Cas and GSC 02901–00089. For the search for double-mode variability, we used all available observations from the ROTSE-I/NSVS and 1SWASP online public archives. Our multicolour CCD observations in the B, V and R bands in Johnson’s system and ASAS-SN data in the V filter (that became available later) confirm the double periodicity of these variables. We study period variations of the two stars; variations of the first-overtone periods were reliably detected.