Title: Inferences from Observations of Blazhko RR Lyrae Stars
Authors: Kolenberg, Katrien
Issue Date: Feb-2010
Publisher: Sternberg Astronomical Institute
Host Document: Variable Stars, the Galactic halo and Galaxy Formation, Proceedings of Kukarkin Centenary Meeting pages:79-82
Conference: Variable Stars, the Galactic halo and Galaxy Formation location:Zvenigorod, Russia date:12-16 October 2009
Abstract: Though the pulsating RR Lyrae stars are used as ``standards" for distance determination and considered the prototypes of radially pulsating stars, several aspects of their pulsation have not been understood. A large fraction of the RR Lyrae stars show a periodic modulation of their pulsation cycle. For more than a century, this so-called Blazhko effect has eluded an explanation.

Through recent photometric studies, new features in the frequency spectrum of Blazhko stars have been found. On the other hand, spectroscopic data permit an `in depth' study of the star's atmosphere. I discuss the recent results from photometry, spectroscopy and spectropolarimetry, and their implications for the proposed models of the Blazhko modulation.
Publication status: published
KU Leuven publication type: IC-p
Appears in Collections:Institute of Astronomy

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