Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13a1653m&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P13A-1653
Physics
[3919] Mineral Physics / Equations Of State, [5724] Planetary Sciences: Fluid Planets / Interiors, [6220] Planetary Sciences: Solar System Objects / Jupiter
Scientific paper
Transit surveys have determined that many of the gas giant exoplanets have inflated radii when compared with mass-radius relationships derived from standard interior models. All exoplanet interior models so far have been based on semi-analytical equation of state calculations, which include significant approximations. So it is unclear how much of the observed inflation must be attributed to uncertainties in the equation of state. We perform density functional molecular dynamics simulations of hydrogen-helium mixtures in the interiors of giant exoplanets and characterized the equation of state by determining pressure, internal energy, and entropy with higher accuracy than previously possible. Special emphasis will be placed on the role of electronic excitations at higher temperature above ~10,000 K. We derive a mass-radius relationship for giant planets based on ab initio methods and compare with previous methods.
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