Revisiting CoRoT RR Lyrae stars: detection of period doubling and temporal variation of additional frequencies

@article{Szabo2014RevisitingCR,
  title={Revisiting CoRoT RR Lyrae stars: detection of period doubling and temporal variation of additional frequencies},
  author={R'obert Szab'o and J'ozsef M. BenkHo and M. Papar'o and Edouard Chapellier and Ennio Poretti and Annie Baglin and Werner W. Weiss and Katrien Kolenberg and Elisabeth Guggenberger and J. F. Le Borgne},
  journal={Astronomy and Astrophysics},
  year={2014},
  volume={570},
  pages={100-119}
}
Context. High-precision, space-based photometric missions like CoRoT and Kepler have revealed new and surprising phenomena in classical variable stars. Such discoveries were the period doubling in RR Lyrae stars and the frequent occurrence of additional periodicities some of which can be explained by radial overtone modes, but others are discordant with the radial eigenfrequency spectrum. Aims. We search for signs of period doubling in CoRoT RR Lyrae stars. The occurrence of this dynamical… 
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