Double-mode radial-non-radial RR Lyrae stars in the OGLE photometry of the Galactic bulge

H. Netzel, R. Smolec, P. Moskalik

Non-radial modes are excited in classical pulsators, both in Cepheids and in RR Lyrae stars. Firm evidence come from the first overtone pulsators, in which additional shorter perio…