Long term light curve variations of the Kepler Cepheid V 1154 Cyg
Institute of Astronomy of the Russian Academy of Sciences, 48 Pyatnitskaya St. 119017, Moscow, Russia
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Published online: 23 September 2015
We present a period analysis of the light curve and its Fourier parameters of the bright Cepheid V1154 Cyg (P=4.925454 days) based on the observations by the Kepler space telescope. Fourier parameters R21, R31 clearly indicate variations with a period of 158.2 ± 1 days (more than 5σ peak in the power spectrum) with a very small amplitude (0.265-0.275 for R21, 0.065-0.071 for R31) making impossible to detect it with ground- based observations. Finally we discuss that this effect is similar to the Blazhko effect in RR Lyrae stars.
© Owned by the authors, published by EDP Sciences, 2015
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