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journal id: "astronomyxandxastrophysics"
| Authors | M. Kama, M. Min, C. Dominik | | Title | The inner rim structures of protoplanetary discs |
| Journal | Astronomy and Astrophysics |
| Volume | 506 |
| Year | 2009 |
| Issue | 3 |
| Pages | 1199-1213 |
| ISSN | 00046361 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Abstract | The inner boundary of protoplanetary discs is structured by the dramatic opacity changes at the transition from the dust-containing to a dust-free zone. This paper explores the variety and limits of inner rim structures in passively heated dusty discs. For this study, we implemented detailed sublimation physics in a fast Monte Carlo radiative transfer code. We show that the inner rim in dusty discs is not an infinitely sharp wall but a diffuse region which may be narrow or wide. Furthermore, high surface densities and large silicate grains as well as iron and corundum grains decrease the rim radius, from a 2.2 AU radius for small silicates around a 47 L-circle dot Herbig Ae star typically to 0.4 AU and as close as 0.2 AU. A passive disc with grain growth and a diverse dust composition must thus have a small inner rim radius. Finally, an analytical expression is presented for the rim location as a function of dust, disc and stellar properties. |
| Document type | Article |
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