Discovery of Peculiar Double-Mode Pulsations and Period Doubling in KEPLER RRc Variables

2012/08/21 by P. Moskalik, Moskalik, P., R. Smolec +17 · 1 citation
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysics and Star Formation Studies #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.1208.4251

Proceedings of the 20th Stellar Pulsation Conference Series: "Impact of new instrumentation & new insights in stellar pulsations", 5-9 September 2011, Granada, Spain

arxiv created 2012/08/21 · openalex publication_date 2012/08/21 · arxiv updated 2012/08/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We analyzed the Long Cadence photometry of 4 first overtone RR Lyr-type stars (RRc stars) observed by the KEPLER telescope. All studied variables are multiperiodic. The strongest secondary peak appears for f₂/f₁ = 1.58-1.63, or P₂/P₁ = 0.61-0.63. In each star we detect at least one subharmonic of f₂, either at ~1/2 f₂ or at ~3/2 f₂. The presence of subharmonics is a characteristic signature of a period doubling.

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