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| Paper: |
Dust in Protoplanetary Disks |
| Volume: |
309, Astrophysics of Dust |
| Page: |
213 |
| Authors: |
Chiang, E.I. |
| Abstract: |
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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