Chemical composition of Earth-like planets

M. P. RONCO; A. THIABAUD; U. MARBOEUF; Y. ALIBERT; G. C. DE ELÍA; O. M. GUILERA

Cordoba

Congreso; 57a. Reunión Anual de la Asociación Argentina de Astronomía; 2014

Models of planet formation are mainly focused on the accretion and dynamical processes of theplanets, neglecting their chemical composition. In this work, we calculate the condensation sequence of the dier-ent chemical elements for a low-mass protoplanetary disk around a solar-type star. We incorporate this sequenceof chemical elements (refractory and volatile elements) in our semi-analytical model of planet formation whichcalculates the formation of a planetary system during its gaseous phase. The results of the semi-analytical model(nal distributions of embryos and planetesimals) are used as initial conditions to develope N-body simulationsthat compute the post-oligarchic formation of terrestrial-type planets. The results of our simulations show thatthe chemical composition of the planets that remain in the habitable zone has similar characteristics to the chem-ical composition of the Earth. However, exist dierences that can be associated to the dynamical environment inwhich they were formed.