Fig. 3.
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Top: Estimated large separation for KIC 8827821, Δν = 61 μHz = 5.27 d−1. Top left: Fourier transform (FT), autocorrelation (AC), and the histogram of frequency differences (HFD). Top right: Echélle diagram (ED). Bottom: Frequency ranges corresponding to radial modes with radial orders n = 1 to n = 8 based on the estimated large separation.
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