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Paper: Many Faces of Blazhko Modulation Observed from Space
Volume: 529, RR Lyrae/Cepheid 2019: Frontiers of Classical Pulsators
Page: 319
Authors: Bódi, A.; Plachy, E.; Szabó, P.; Molnár, L.; Pál, A.; Szabó, R.
Abstract: The K2 and the TESS missions provide a unique opportunity to investigate the phenomenon of the Blazhko effect in great detail. Here we present the analysis of nearly two hundred Blazhko stars that represent the largest sample of modulated RR Lyrae stars investigated with space-based photometry so far. We focus on the relation between the modulation of the pulsation phase and the pulsation amplitude, as well as the coexistence of the Blazhko effect with the nonlinear phenomenon called period doubling. Given the limited length of observations, we were able to determine only relatively short modulation periods accurately. Nevertheless, we found that the pulsation amplitude and phase changes are not necessarily correlated and their relation can be rather complex.
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