Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2S044

The appearance of large aggregates in protoplanetary disks

Min, Michiel (Astronomical Institute ’Anton Pannekoek’, University of Amsterdam)
Rab, Christian (Department of Astrophysics, University of Vienna)
Dominik, Carsten (Astronomical Institute ’Anton Pannekoek’, University of Amsterdam)
Woitke, Peter (SUPA, School of Physics & Astronomy, University of St. Andrews)

Planet formation starts when tiny dust grains in protoplanetary disks aggregate to form larger structures. These large aggregates have observational and dynamical properties that are very different from more compact particles. Understanding the evolution of protoplanetary disks, the planet formation process, and constraining this from observations, require that we understand the observational characteristics of these structures. We present computations of the optical properties and radiative transfer of aggregates in protoplanetary disks. We discuss how we can constrain aggregate size and structure from observations and as such constrain the first step in planet formation.

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