Class: BlazhkoEffect
http://www.astro.umd.edu/~eshaya/astro-ont/owl/astronomy.owl#BlazhkoEffect
Annotations
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label: "Blazhko effect" (string)
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definition: "A secondary variation of the amplitude and period of some RR Lyrae stars and related pulsating variables, named for its discoverer, Sergei Blazko. The effect is displayed, for example, by the RR Lyrae star XZ Cygni, which has a primary pulsation period of about 0.466 days but displays a further modulation with a 57-day cycle. It is thought to involve double-mode pulsation or, in some cases, an oblique rotator." (string)