The effect of temperature evolution on the interior structure of H${}_{2}$O-rich planets

Li Zeng; Dimitar Sasselov

doi:10.1088/0004-637X/784/2/96

paper

The effect of temperature evolution on the interior structure of H $_{2}$ O-rich planets

arXiv:1402.7299 · doi:10.1088/0004-637X/784/2/96

Abstract

For most planets in the range of radii from 1 to 4 R $_{\oplus}$ , water is a major component of the interior composition. At high pressure H $_{2}$ O can be solid, but for larger planets, like Neptune, the temperature can be too high for this. Mass and age play a role in determining the transition between solid and fluid (and mixed) water-rich super-Earth. We use the latest high-pressure and ultra-high-pressure phase diagrams of H $_{2}$ O, and by comparing them with the interior adiabats of various planet models, the temperature evolution of the planet interior is shown, especially for the state of H $_{2}$ O. It turns out that the bulk of H $_{2}$ O in a planet's interior may exist in various states such as plasma, superionic, ionic, Ice VII, Ice X, etc., depending on the size, age and cooling rate of the planet. Different regions of the mass-radius phase space are also identified to correspond to different planet structures. In general, super-Earth-size planets (isolated or without significant parent star irradiation effects) older than about 3 Gyr would be mostly solid.

Accepted by ApJ, in print for March 2014 (14 pages, 3 colored figures, 1 table)

The effect of temperature evolution on the interior structure of H $_{2}$ O-rich planets

Abstract

References in corpus (4)

Cited by in corpus (23)

The effect of temperature evolution on the interior structure of H2​O-rich planets

Abstract

References in corpus (4)

Cited by in corpus (23)

The effect of temperature evolution on the interior structure of H $_{2}$ O-rich planets