We study the sensitivity of the sound speed to relativistic corrections of
the equation of state (EOS) in the standard solar model by means of a
helioseismic forward analysis. We use the latest GOLF/SOHO data for â„“=0,1,2,3 modes to confirm that the inclusion of the relativistic corrections to
the adiabatic exponent Γ1​ computed from both OPAL and MHD EOS leads to
a more reliable theoretical modelling of the innermost layers of the Sun.Comment: 3 pages, 3 figures, aa.cls, to appear on Astronomy and Astrophysic