SMALL FREQUENCY SEPARATIONS AS SEEN IN THE AUTOCORRELATION FUNCTION OF THE WHOLE-DISK MEASUREMENTS

摘要

We address the origin of the apparent modulation in the amplitudes of the even and odd peaks in the autocorrelation function of whole-disk measurements, and show that this modulation is directly related to the small frequency separations of the low-degree p-modes. This modulation can be used for estimating the small separations when the data quality is insufficient for reliable identification of oscillation frequencies in noisy power spectra.