Blazhko-type modulation in the double-mode RR Lyrae stars of the OGLE Galactic bulge collection
Blazhko-type modulation in the double-mode RR Lyrae stars of the OGLE Galactic bulge collection
We present the analysis of Blazhko-type modulation in double-mode RR Lyrae (RRd) stars found in the Optical Gravitational Lensing Experiment (OGLE) photometry of the Galactic bulge. Modulation is detected in 15 stars. Most of them have non-typical period ratio of the radial modes. In the Petersen diagram, at a given …