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Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
F. Brauer, C. P. Dullemond, Th. Henning
The growth of solid particles towards meter sizes in protoplanetary disks has to circumvent at least two hurdles, namely the rapid loss of material due to radial drift and particle…
A Search for Mid-Infrared Molecular Hydrogen Emission from Protoplanetary Disks
A. Carmona, M. E van den Ancker, Th. Henning +6
We observed the Herbig Ae/Be stars UX Ori, HD 34282, HD 100453, HD 101412, HD 104237 and HD 142666, and the T Tauri star HD 319139 and searched for H2 0-0 S(2) emission at 12.278 m…
High spatial resolution mid-infrared observations of the low-mass young star TW Hya
Th. Ratzka, Ch. Leinert, Th. Henning +3
We want to improve knowledge of the structure of the inner few AU of the circumstellar disk around the nearby T Tauri star TW Hya. Earlier studies have suggested the existence of a…
Dust crystallinity in protoplanetary disks: the effect of diffusion/viscosity ratio
Ya. Pavlyuchenkov, C. P. Dullemond
The process of turbulent radial mixing in protoplanetary disks has strong relevance to the analysis of the spatial distribution of crystalline dust species in disks around young st…
Spatial separation of small and large grains in the transitional disk around the young star IRS 48
V. C. Geers, K. M. Pontoppidan, E. F. van Dishoeck +5
We present spatially resolved mid-infrared images of the disk surrounding the young star IRS 48 in the Ophiuchus cloud complex. The disk exhibits a ring-like structure at 18.7 micr…
Survival of the mm-cm size grain population observed in protoplanetary disks
F. Brauer, C. P. Dullemond, A. Johansen +3
Millimeter interferometry provides evidence for the presence of mm to cm size "pebbles" in the outer parts of disks around pre-main-sequence stars. The observations suggest that la…