Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-27
Mon.Not.Roy.Astron.Soc.375:500-512,2007
Astronomy and Astrophysics
Astrophysics
13 pages, 5 figures. Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2006.11341.x
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.
Alexander Richard D.
Armitage Philip J.
No associations
LandOfFree
Dust dynamics during protoplanetary disc clearing does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dust dynamics during protoplanetary disc clearing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust dynamics during protoplanetary disc clearing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-350001