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