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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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