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New approaches to solve the old Blazhko puzzle in RR Lyrae stars

Published online by Cambridge University Press:  02 March 2005

K. Kolenberg
K. Kolenberg
Affiliation:
Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, A - 1180 Wien, Austria email: kolenberg@astro.univie.ac.at
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Abstract

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Almost a century after its discovery, the phenomenon of amplitude and/or phase modulation, observed in a large percentage of the RR Lyrae stars, still lacks a widely accepted theoretical understanding. Recent attempts to theoretically explain the effect focus on two alternatives, the magnetic models and the resonances models, both involving the presence of nonradial pulsation components.

We present the ‘Blazhko project’, a large international collaboration focused on understanding the Blazhko effect. The aim of the ‘Blazhko project’ is to combine spectroscopic and photometric data from a sample of well-selected Blazhko and nonBlazhko stars, to reveal decisive information on the physical mechanism responsible for the modulation.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Stars: oscillations; stars: variables: RR Lyraestars: horizontal-branch
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS224 , July 2004 , pp. 367 - 372
Copyright
© 2004 International Astronomical Union