We present new results for the interior of solar as well as extrasolar giant planets based on ab initio molecular dynamics simulations for the most abundant planetary materials hydrogen, helium, and water. The equation of state, the electrical conductivity and reflectivity can be calculated up to high pressures; very good agreement with shock‐wave experimental results is found. The nonmetal‐to‐metal transition in hydrogen and the subsequent demixing of hydrogen from helium is of great importance for the interior of Jovian planets. The superionic phase predicted for water at high pressures is relevant for Neptune‐like giant planets. Advanced planetary models can be constructed based on the new ab initio data.

Topics
Molecular dynamics, Shock waves, Electrical conductivity, Equations of state, Extrasolar planets, Public policy and governance
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© 2009 American Institute of Physics.
2009
American Institute of Physics
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