Kepler RR Lyrae stars: Beyond period doubling

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We examined the complete short cadence sample of fundamental-mode Kepler RR Lyrae stars to further investigate the recently discovered dynamical effects such as period doubling and additional modes. Here we present the findings on four stars. V450 Lyr may be a non-classical double-mode RR Lyrae star pulsating in the fundamental mode and the second overtone. For the three remaining stars we observe the interaction of three different modes. Since the period ratios are close to resonant values, we observe quasi-repetitive patterns in the pulsation cycles in the stars. These findings support the mode-resonance explanations of the Blazhko effect.

Original languageEnglish
Title of host publicationPrecision Asteroseismology
EditorsJoyce Guzik, William Chaplin, William Chaplin, Gerald Handler, Andrzej Pigulski
Number of pages2
Publication statusPublished - Mar 3 2014

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221



  • Kepler
  • stars: variable: RR Lyrae

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

Cite this

Molnár, L., Benko, J. M., Szabó, R., & Kolláth, Z. (2014). Kepler RR Lyrae stars: Beyond period doubling. In J. Guzik, W. Chaplin, W. Chaplin, G. Handler, & A. Pigulski (Eds.), Precision Asteroseismology (S301 ed., pp. 459-460). (Proceedings of the International Astronomical Union; Vol. 9, No. S301).