USNO-B1.0 1171-0309158: An RR Lyrae Star that Switched from a Double- to Single-Mode Pulsation

• Autorzy: Khruslov A. V. , Kusakin A. V. , Reva I. V.

Identyfikatory

DOI

10.32023/0001-5237/67.4.2

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

stars: variables: RR Lyrae; stars: oscillations; stars: Population II; stars: horizontal-branch

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2017
• Tom: Vol. 67, No. 4
• Strony: 317--327
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Khruslov A. V.

• Sternberg Astronomical Institute, Moscow State University, Moscow, Russia
• Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia

autor

Kusakin A. V.

• Fesenkov Astrophysical Institute, Almaty, Kazakhstan

autor

Reva I. V.

• Fesenkov Astrophysical Institute, Almaty, Kazakhstan

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).