ROMANIAN ASTRONOMICAL JOURNAL vol:18 issue:Supplement
Sub-Regional European Astronomical Committee University of Athens Astronomical Institute of the Romanian Academy Proceedings of the Astro-Meeting LATEST PROGRESS IN ASTROPHYSICS edition:5 location:Athens, Greece date:5–6 October 2007
On the centenary of the discovery of the Blazhko effect, it is time to give a rundown of what progress has been made over the past decades in the understanding of the phenomenon.
The Blazhko effect is a periodic amplitude and/or phase modulation of the light curve, shown by a large fraction of the astrophysically important RR Lyrae stars. Despite numerous devoted observational studies and elaborate models attempting to reproduce the modulation, it still defies a definitive explanation. I present an overview of the observational and theoretical status of studies devoted to the phenomenon, and conclude with the present status.