Protostars and Planets VI, Heidelberg, July 15-20, 2013
Poster 2B037
Structure and migration in stellar irradiated Discs
Bitsch, Bertram (OCA)
Alessandro, Morbidelli (OCA)
Abstract:
Structure of evolving stellar irradiated discs
The evolution of the protoplanetary disc is of crucial importance to explain the
growth and formation of planets inside the disc. In a recent work, we have shown
that the disc structure is crucially dependent on the stellar heating and on the
opacity (Bitsch et al., 2013). In particular, some self shadowed regions in the
disc form, which are dependent on the opacity transitions in the disc. Inside these
shadowed regions, small mass planets can migrate outwards and gather at the zero-
migration radius, where they can form bigger objects through collisions.
The structure of the disc is dependent on the mass-flux through the disc, which
determines the evolution of the density profile. The metallicity and grain sizes
determine the value and the shape of the opacity profile, which influence the
temperature structure of the disc. We will show in our 2D models the interplay
between these different parameters and what their influence on the disc structure
are. We will also address how these different disc structures influence the
zero-migration radius inside a disc, which will give important indications where
the cores of giant planets in a disc potentially form.
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