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Fig. 2


Upper panel: average power density as a function of time in units of the total time for KIC 5955122 (solid line) and for the Sun (dashed line). A prominent peak around 0.36 (in units of the total time) is seen for the Sun and corresponds to the maximum of solar cycle 23. Lower panel: power density at the maximum of the upper figure for KIC 5955122 (continuous line) and for the Sun (dashed line, fit to the power density). Note that in Eq. (1) β = 1 / 2 for KIC 5955122 and β = 2 for the Sun.

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