Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2010-04-06
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
127 pages, 12 tables (11 in paper, 1 online only), 19 figures (16 in paper, 3 online only). Accepted to ApJ.
Scientific paper
10.1088/0004-637X/715/2/1050
Extrasolar planet host stars have been found to be enriched in key planet-building elements. These enrichments have the potential to drastically alter the composition of material available for terrestrial planet formation. Here we report on the combination of dynamical models of late-stage terrestrial planet formation within known extrasolar planetary systems with chemical equilibrium models of the composition of solid material within the disk. This allows us to determine the bulk elemental composition of simulated extrasolar terrestrial planets. A wide variety of resulting planetary compositions are found, ranging from those that are essentially "Earth-like", containing metallic Fe and Mg-silicates, to those that are dominated by graphite and SiC. This shows that a diverse range of terrestrial planets may exist within extrasolar planetary systems.
Bond Jade Chantelle
Lauretta Dante S.
O'Brien David Patrick
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