Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-09
Mon.Not.Roy.Astron.Soc.369:216-228,2006
Astronomy and Astrophysics
Astrophysics
13 pages, 9 figures. Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2006.10293.x
In this paper we consider the effect of the direct ionizing stellar radiation field on the evolution of protoplanetary discs subject to photoevaporative winds. We suggest that models which combine viscous evolution with photoevaporation of the disc (e.g. Clarke, Gendrin & Sotomayor 2001) incorrectly neglect the direct field after the inner disc has drained, at late times in the evolution. We construct models of the photoevaporative wind produced by the direct field, first using simple analytic arguments and later using detailed numerical hydrodynamics. We find that the wind produced by the direct field at late times is much larger than has previously been assumed, and we show that the mass-loss rate scales as $R_{in}^{1/2}$ (where $R_{in}$ is the radius of the instantaneous inner disc edge). We suggest that this result has important consequences for theories of disc evolution, and go on to consider the effects of this result on disc evolution in detail in a companion paper (Alexander, Clarke & Pringle 2006b).
Alexander Richard D.
Clarke Catherine J.
Pringle James E.
No associations
LandOfFree
Photoevaporation of protoplanetary discs I: hydrodynamic models 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 Photoevaporation of protoplanetary discs I: hydrodynamic models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoevaporation of protoplanetary discs I: hydrodynamic models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-114163