Oral Presentation

Understanding distributions of grain sizes and turbulence in protoplanetary disks

Author(s):

Presenter: Satoshi Ohashi (RIKEN)

The first step of the planet formation is the dust grain growth in protoplanetary disks. The typical size of dust grains in the interstellar medium is thought to be sub-micron to micron size. In order to understand how the dust grains become larger, we have been proposing the polarization observations for measuring the grain size because larger dust grains have enough albedo to be scattered.
Furthermore, we find that the scattered induced polarization also allow us to measure the dust scale height. These physical parameters of the grain size and dust scale height allow us to measure the turbulence, which will have the potential to constrain the planet-forming scenario.
We also introduce the synergy of SMA and ALMA observations, in particular, the dust continuum observations.