Dust in Protoplanetary Disks

Details Dust in Protoplanetary Disks Dust in Protoplanetary Disks

2003-09-08

arxiv.org/abs/astro-ph/0309249v1

Astronomy and Astrophysics

Astrophysics

Invited review to Astrophysics of Dust Conference, eds. G. Clayton, B. Draine, and A. Witt, peer-reviewed and accepted

Scientific paper

We critically examine the best lines of evidence for grain growth in protoplanetary disks, based on modelling of observed spectral energy distributions and images of T Tauri and Herbig Ae stars. The data are consistent with millimeter-sized grains near disk midplanes, and micron-sized grains near disk surfaces. We review three channels by which grains can grow, including direct condensation from the vapor phase, grain-grain collisional sticking, and gravitational instability. The utility of dust in identifying as yet unseen extrasolar planets is highlighted.

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