The compositional diversity of extrasolar terrestrial planets. I. in situ simulations

Jade C. Bond, David P. O'Brien, Dante S. Lauretta

Research output: Contribution to journalArticlepeer-review

222 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1050-1070
Number of pages21
JournalAstrophysical Journal
Volume715
Issue number2
DOIs
StatePublished - Jan 1 2010

Keywords

  • Planetary systems
  • Planets and satellites: composition
  • Planets and satellites: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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