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Paper: Statistical Tests for Changes in Pulsation Mode Properties
Volume: 452, Fifth Meeting on Hot Subdwarf Stars and Related Objects
Page: 223
Authors: Koen, C.
Abstract: Formally it may not be possible to discriminate between true variability of a given pulsation mode on the one hand, and beating between two or more modes with close frequencies. In a number of sdBV stars dramatic changes over short timescales in the overall power content of oscillations, and other evidence, favour the former explanation. Two statistical procedures are discussed: testing for stochastic versus deterministic oscillations, and testing for amplitude variability versus constant amplitudes, at a fixed frequency.
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