Composition of Massive Giant Planets

Details Composition of Massive Giant Planets Composition of Massive Giant Planets

2010-10-20

arxiv.org/abs/1010.4257v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

6 pages, Proceedings of IAU Symposium 276 (Invited talk), The Astrophysics of Planetary Systems: Formation, Structure, and Dyn

Scientific paper

The two current models for giant planet formation are core accretion and disk instability. We discuss the core masses and overall planetary enrichment in heavy elements predicted by the two formation models, and show that both models could lead to a large range of final compositions. For example, both can form giant planets with nearly stellar compositions. However, low-mass giant planets, enriched in heavy elements compared to their host stars, are more easily explained by the core accretion model. The final structure of the planets, i.e., the distribution of heavy elements, is not firmly constrained in either formation model.

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