EXTRACTION OF THE CONVECTIVE ZONE EXTENSION FROM SOLAR-LIKE STARS

摘要

The aim- of this study is to estimate the quality of the asteroseismic observations for 150 days of photometric measurements. We have used simulated data and VIRGO time series as a good example of a one-solar-mass Edding-ton target. From the extracted-mode frequencies we have tried to measure the position of the base of the convective zone (BCZ). We have studied the two following cases: in the first one, the observation is done during five consecutive months; in the second, we used five non-consecutive one-month observations. The effects of the stochastic excitation and the stellar activity on the frequency determination are studied and discussed. In this'framework we are also developing a new semi-automatic algorithm to extract low-degree mode parameters without any a priori.