Planetary System Formation and the Diversity of Extrasolar Systems

YAMILA MIGUEL; OCTAVIO MIGUEL GUILERA; ADRIÁN BRUNINI

Bonn

Conferencia; 483 WE-Heraeus-Seminar. Extrasolar Planets: Towards Comparative Planetology beyond the Solar System; 2011

Physikzentrum Bad Honnef

So far ~ 460 exoplanets have been found and many deductions were obtained from this sample that helped us to get a better understanding of planetary formation process. But questions such as, how common are the planetary systems like our own in the Universe?, What factors influence the architecture of the planetary systems? and What is the diversity of planetary systems that we could find in the universe? Remain uncertain. With these questions in mind we develop a simple model for computing planetary systems formation based on the core instability model for the gas accretion of the embryos and the oligarchic growth regime for the accretion of the solid cores. Our model also includes planetary migration and planetesimals migration which are key effects to reproduce the distribution observed. With this model we consider different initial conditions to generate a variety of planetary systems and analyse them statistically. We explore the effects in the architecture of the planetary system of assuming different discs, in the context of a surface density profile motivated by similarity solutions for viscous accretion discs, analising not only different initial discs profiles but also a large range of discs masses and sizes according to the last results of observations in protoplanetary discs.