Back to Volume
Paper: The Blazhko Project: Joint Efforts in Solving a Century-old Problem
Volume: 335, The Light-Time Effect in Astrophysics: Causes and Cures of the O - C diagram
Page: 95
Authors: Kolenberg, K.
Abstract: 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 widely acceptable 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.

In this paper the Blazhko Project is presented, a larger international collaboration focused on understanding the Blazhko effect. The aim of the project is to combine spectroscopic and photometric data from a sample of well-selected Blazhko and non-Blazhko stars, in order to reveal crucial information on the physical mechanism responsible for the modulation.

The possible key to the century-old Blazhko puzzle lies in the detailed study of the line profile variations (LPV) over the pulsation and Blazhko cycle. We briefly discuss the methodology of the project.

Back to Volume