NDLI: Giant planets as laboratory for high energy density physics

Content Provider	IEEE Xplore Digital Library
Author	Redmer, R. Nettelmann, N. Lorenzen, W. Holst, B. French, M. Kietzmann, A.
Copyright Year	2008
Description	Author affiliation: Inst. fur Phys., Univ. Rostock, Rostock (Redmer, R.; Nettelmann, N.; Lorenzen, W.; Holst, B.; French, M.; Kietzmann, A.)
Abstract	Giant planets such as Jupiter and Saturn in our solar system have attracted a renewed lively interest since the discovery of extrasolar planets. The study of planetary formation processes, of the internal structure and evolution of giant planets are challenging problems in this context. Furthermore, the interior of giant planets is a perfect laboratory to study matter at high energy densities. For instance, pressure and temperature inside Jupiter rise from almost normal conditions in the outer atmosphere up to about 20 000 K and 40 Mbar in the central core region. We have performed ab initio quantum molecular dynamics simulations to calculate highly accurate equation of state data for the most abundant planetary materials hydrogen, helium, and water in this warm dense matter region. The influence of this new data on the internal structure of Jupiter and other giant planets is investigated and compared with state-of-the- art results within a three-layer model which is consistent with astrophysical observations for, e.g., the mass, the radius, and the gravitational moments. We study also interesting high- pressure effects such as the nonmetal-to-metal transition in hydrogen and helium, the demixing of hydrogen and helium as well as the exotic phase diagram of high-pressure water with a possible superionic phase (proton conductor). Our new ab initio results for the thermophysical properties of warm dense matter will improve our present understanding of the internal structure of hydrogen-rich planets.
Starting Page	1
Ending Page	1
File Size	77254
Page Count	1
File Format	PDF
ISBN	9781424419296
ISSN	07309244
DOI	10.1109/PLASMA.2008.4590589
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Planets Mathematical model Helium Jupiter Data models Laboratories Equations
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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