Dust dynamics during protoplanetary disc clearing
| dc.creator | Alexander, R. D. | |
| dc.creator | Armitage, P. J. | |
| dc.date | 2006-11-27 | |
| dc.date.accessioned | 2026-07-07T10:21:03Z | |
| dc.date.available | 2026-07-07T10:21:03Z | |
| dc.description | We consider the dynamics of dust and gas during the clearing of protoplanetary discs. We work within the context of a photoevaporation/viscous model for the evolution of the gas disc, and use a two-fluid model to study the dynamics of dust grains as the gas disc is cleared. Small (<~10um) grains remain well-coupled to the gas, but larger (~1mm) grains are subject to inward migration from large radii (~50AU), suggesting that the time-scale for grain growth in the outer disc is ~10^4-10^5yr. We describe in detail the observable appearance of discs during clearing, and find that pressure gradients in the gas disc result in a strong enhancement of the local dust-to-gas ratio in a ring near to the inner disc edge. Lastly, we consider a simple model of the disc-planet interaction, and suggest that observations of disc masses and accretion rates provide a straightforward means of discriminating between different models of disc clearing. | |
| dc.description | 13 pages, 5 figures. Accepted for publication in MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0611821 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0611821 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.375:500-512,2007 | |
| dc.identifier | doi:10.1111/j.1365-2966.2006.11341.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175044 | |
| dc.subject | Astrophysics | |
| dc.title | Dust dynamics during protoplanetary disc clearing | |
| dc.type | text |