Letter to the Editor Equation of state and helioseismic inversions
نویسنده
چکیده
Inversions to determine the squared isothermal sound speed anddensitywithin theSunoften use the heliumabundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be suppressed.Wealso show that it is possible to invert for the intrinsic difference in the adiabatic exponent Γ1 between two equations of state. When applied to solar data such inversion rules out the EFF equation of state completely, while with existing data it is difficult to distinguish between other equations of state.
منابع مشابه
Equation of state and helioseismic inversions
Inversions to determine the squared isothermal sound speed and density within the Sun often use the helium abundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be sup...
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