Mathematics – Logic
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p23f..04c&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P23F-04
Mathematics
Logic
[6296] Planetary Sciences: Solar System Objects / Extra-Solar Planets
Scientific paper
The details of the formation of the terrestrial planets are long-standing questions in the geological, planetary and astronomical sciences, with the discovery of extrasolar planetary systems placing even greater emphasis on these questions. Here we present simulations of the bulk compositions of simulated terrestrial planets in extrasolar planetary systems. These simulations incorporate both giant planet migration into the dynamical simulations and a variety of ices, clathrates and hydrates into the chemical modeling, providing us with a more inclusive view of extrasolar terrestrial planet formation. We find that a diverse range of extrasolar terrestrial planets are produced, ranging from bulk elemental compositions similar to that of Earth to those that are enriched in elements such as C and Si, producing planets with compositions unlike anything we have previously observed. Giant planet migration significantly alters the composition of the final terrestrial planet by redistributing material throughout the system. Simulated terrestrial planets produced within the migration simulations are found to contain larger amounts of Mg-silicate species and hydrous material. These variations in composition will greatly influence planetary processes such as plate tectonics, planetary interior structure and the primary atmospheric composition.
Carter-Bond Jade C.
O'Brien David Patrick
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