Ab initio Equation of State data for hydrogen, helium, and water and the internal structure of Jupiter

Details Ab initio Equation of State data for hydrogen, helium, and water and the internal structure of Jupiter Ab initio Equation of State data for hydrogen, helium, and water and the internal structure of Jupiter

2007-12-06

arxiv.org/abs/0712.1019v2

Astrophys.J.683:1217-1228,2008

Astronomy and Astrophysics

Astrophysics

to appear in ApJ in August 2008, 11 figures

Scientific paper

10.1086/589806

The equation of state of hydrogen, helium, and water effects interior structure models of giant planets significantly. We present a new equation of state data table, LM-REOS, generated by large scale quantum molecular dynamics simulations for hydrogen, helium, and water in the warm dense matter regime, i.e.for megabar pressures and temperatures of several thousand Kelvin, and by advanced chemical methods in the complementary regions. The influence of LM-REOS on the structure of Jupiter is investigated and compared with state-of-the-art results within a standard three-layer model consistent with astrophysical observations of Jupiter. Our new Jupiter models predict an important impact of mixing effects of helium in hydrogen with respect to an altered compressibility and immiscibility.

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