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Paper: The equation of state
Volume: 40, Inside the Stars, IAU Colloquium 137
Page: 208
Authors: Daeppen, Werner
Abstract: The statistical-mechanical foundations of the equation of state needed for the interiors of 'normal' stars are discussed. The requirements of helioseismology and asteroseismology are examined, and two representative formalisms of current interest - the MHD equation of state (chemical picture) and the Livermore equation of state (physical picture) are presented. Detailed comparisons between these two formalisms are employed to assess the present uncertainty in the equation of state and to localize those regions in temperature and density where progress is most urgent. For the sun, such comparisons have already resulted in a better, and yet simple, equation of state.
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