Period Doubling Effect in Blazkho Modulated RRc Star from OGLE-IV Survey?

Period Doubling Effect in Blazkho Modulated RRc Star from OGLE-IV Survey?

Rajeev Singh Rathour and Radosław Smolec

We report a possible detection of a period doubling effect in the Blazhko RRc star, OGLE-BLG-RRLYR-06097, from the OGLE-IV survey data. Successive pre-whitening analysis results in a frequency peak at half-integer of the radial mode, indicating period doubling. However, the amplitude of the signal is too low to observe any manifestation directly in the light curve. We also present frequency analysis of Kepler observations of KIC 4484128, which is a well-established modulated fundamental mode RR Lyrae star with period doubling effect, to show the correspondence with our candidate.

Proceedings of the Polish Astronomical Society, vol. 12, 209-212 (2022)

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