USNO-B1.0 1171-0309158: An RR Lyrae Star that Switched from a Double- to Single-Mode Pulsationстатья
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Дата последнего поиска статьи во внешних источниках: 18 февраля 2018 г.
Аннотация:We report the discovery of a new case of an RR Lyrae star that experienced a switching of its pulsation mode. We detected USNO-B1.0 1171-0309158 as a double-mode RR Lyrae star from observations of the Catalina Surveys that showed additional scattering on the light curve. Our analysis of the time-series of CSS data showed gradual increase in scattering and in the amplitude of fundamental pulsation mode. Our CCD observations carried out in 2015–2017 reveal that this object is now a fundamental-mode RRab star, with no sign of the first-overtone pulsation.