EPJ Web Conf.
Volume 152, 2017Wide-Field Variability Surveys: A 21st Century Perspective – 22nd Los Alamos Stellar Pulsation – Conference Series Meeting
|Number of page(s)||2|
|Section||Statistical challenges, new approaches and techniques|
|Published online||08 September 2017|
KIC 2831097 A short orbital-period candidate RR Lyrae binary
1 Konkoly Observatory, MTA Research Centre for Astronomy and Earth Sciences, Konkoly Thege út 15–17, H–1121 Budapest, Hungary
2 Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlr̆ská 2, CZ–611 37 Brno, Czech Republic
3 CEITEC BUT, Purkyn̆ova 656/123, CZ–612 00 Brno, Czech Republic
Published online: 8 September 2017
KIC 2831097 was discovered to be a first-overtone RR Lyrae pulsator based on 4-year Kepler photometry (Sódor et al. 2017, MNRAS, 465, L1). The data show strong, 0.1 d amplitude systematic phase variations that can be explained by light travel-time effect caused by an about 2-year period orbital motion in a binary system, superimposed on a linear pulsation-period decrease. To verify the binary hypothesis, several well-timed radial-velocity observations will be sufficient.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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