FIRST VIEW OF THE SOLAR CORE FROM GOLF ACOUSTIC MODES

After 8 months of nearly continuous measurements the GOLF instrument, aboard SOHO, has detected acoustic mode frequencies of more than 100 m odes, extending from 1.4 mHz to 4.9 mHz. In this paper, we compare the se results with the best available predictions coming from solar model s. To verify the quality of the data, we examine the asymptotic seismi c parameters; this confirms the improvements achieved in solar models during the last decade. Using the GOLF set of frequencies for l = 0, 1 , 2, 3 combined with the LOWL second year data set for l > 3, we then carry out inversions to infer properties of the solar core. This large ly confirms the previous results down to around 0.1 R., while there re main differences, even closer to the centre, where the present study s hows an extreme sensitivity of the inversion results to the values of the frequencies. We finally consider physical processes which may infl uence directly or indirectly the solar core structure.