https://doi.org/10.1051/epjconf/201510106036
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
a e-mail: kanev@inasan.ru
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
