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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz

IMPACT FACTOR 2018: 0.350

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Volume 24, Issue 4


A Study of Double- and Multi-mode RR Lyrae Variables

A. V. Khruslov
  • Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya str. 48, Moscow 119017, Russian Federation
  • Sternberg Astronomical Institute, Moscow State University, Universitetskij pr. 13, Moscow 119991, Russian Federation
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Published Online: 2017-02-18 | DOI: https://doi.org/10.1515/astro-2017-0239


We present the results of our new study of known RR Lyrae variable stars. All observations available for these stars in the Catalina Surveys were analyzed, and double-mode variations were identified. We studied the Petersen diagram and the period distribution for the double-mode RR Lyrae variables in the Galactic field, pulsating in the first-overtone and fundamental modes. The double-peaked character of the period distribution was detected for Galactic RR(B) stars, corresponding to Oosterhoff’s classes of globular clusters, which indicates that the age and evolution stage of RR(B) stars in the field and RR Lyrae variables in globular clusters are probably the same. Besides, we discovered five RRC stars with two simultaneously excited non-radial pulsations (equidistant triplets).

Keywords: stars: variables: RR Lyrae


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About the article

Received: 2015-11-02

Accepted: 2015-11-30

Published Online: 2017-02-18

Published in Print: 2015-12-01

Citation Information: Open Astronomy, Volume 24, Issue 4, Pages 379–386, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0239.

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© 2015 A. V. Khruslov, published by De Gruyter Open. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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