2009A&A...506..435R

This paper investigates the diagnostic potential of narrow, frequency-windowed autocorrelation as a tool for probing the properties of solar-like oscillating stars when the determination of individual frequencies is impossible or is subject to large uncertainties, and when mode identification is difficult. I use theoretical analysis including phase-shifts, modelling, and data analysis. Narrow-windowed autocorrelation of a time series can reveal the variation with frequency of the large separations Δ(ν) and the half large separations Δ₀₁, Δ₁₀, thus helping with mode identification. This technique is applied to the CoRoT p-mode oscillators HD49933, HD175726, HD181420, and HD181906. Theoretical analysis and modelling are presented to illustrate the technique.