The analysis of indexed astronomical time series - IX. A period change test

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Methods: Data Analysis, Methods: Statistical, Stars: Variables: Other

Scientific paper

A frequency domain test statistic is applied to the full time series of brightness maxima and minima in order to test for changes in the mean pulsation periods of 382 Mira stars. The test statistic depends on two parameters that are related to the intrinsic cycle-to-cycle scatter in the period, and to the measurement error, respectively. It is shown that the former is strongly related to the mean pulsation period of the star.

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