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2017AcA....67..317K - Acta Astron., 67, 317-327 (2017/December-0)
USNO-B1.0 1171-0309158: An RR Lyrae Star that Switched from a Double-to Single-Mode Pulsation.
KHRUSLOV A.V., KUSAKIN A.V. and REVA I.V.
Abstract (from CDS):
We report the discovery of a new case of an RR Lyr star that experienced a switching of its pulsation mode. We detected USNO-B1.0 1171-0309158 as a double-mode RR Lyr 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.
Abstract Copyright: ∼
Journal keyword(s): Stars: variables: RR Lyrae - Stars: oscillations - Stars: Population II - Stars: horizontal-branch
Simbad objects: 12
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