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Migration & Extra-solar Terrestrial Planets: Watering the Planets

Published online by Cambridge University Press:  29 April 2014

Jade C. Carter-Bond ,
David P. O'Brien  and
Sean N. Raymond
Jade C. Carter-Bond
Affiliation:
School of Physics, University of New South Wales, Kensington, NSW 2052Australia email: j.bond@unsw.edu.au
David P. O'Brien
Affiliation:
Planetary Science Institute, 1700 E. Fort Lowell, Tucson, AZ 85719USA email: obrien@psi.edu
Sean N. Raymond
Affiliation:
Université de Bordeaux, Observatoire Aquitain des Sciences de l'Univers, 2 rue de l'Observatoire, BP 89, 33271, Floirac Cedex, France CNRS, UMR 5804, Laboratoire d'Astrophysique de Bordeaux, 2 rue de l'Observatoire, BP 89, 33271, Floirac Cedex, France email: rayray.sean@gmail.com
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Abstract

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A diverse range of terrestrial planet compositions is believed to exist within known extrasolar planetary systems, ranging from those that are relatively Earth-like to those that are highly unusual, dominated by species such as refractory elements (Al and Ca) or C (as pure C, TiC and SiC)(Bond et al. 2010b). However, all prior simulations have ignored the impact that giant planet migration during planetary accretion may have on the final terrestrial planetary composition. Here, we combined chemical equilibrium models of the disk around five known planetary host stars (Solar, HD4203, HD19994, HD213240 and Gl777) with dynamical models of terrestrial planet formation incorporating various degrees of giant planet migration. Giant planet migration is found to drastically impact terrestrial planet composition by 1) increasing the amount of Mg-silicate species present in the final body; and 2) dramatically increasing the efficiency and amount of water delivered to the terrestrial bodies during their formation process.

Keywords

planetary systemsplanets and satellites: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S293: Formation, Detection, and Characterization of Extrasolar Habitable Planets , August 2012 , pp. 229 - 234
Copyright
Copyright © International Astronomical Union 2014 

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