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Paper: Evidence for a Developing Gap in the Disk of TW Hydrae
Volume: 324, Debris Disks and the Formation of Planets: A Symposium in Memory of Fred Gillett
Page: 205
Authors: Calvet, N.; Hartmann, L.; Wilner, D.; Walsh, A.; Sitko, M.L.
Abstract: We have developed a physically self-consistent model of the disk around the nearby 10 Myr old star TW Hya which matches the spectral energy distribution and 7 mm images of the disk. The model requires both significant dust size evolution and a partially-evacuated inner region, a distinct transition to a thicker disk at about 4 AU, and an outer disk radius of approximately 140 AU. The outermost part of the disk is optically thick, and requires grain sizes on the order of ∼ 1 cm, while the transition region (and possibly inner disk) contains micron-sized grains. The truncation of the outer disk may be the signpost of a developing gap due to the effects of a growing protoplanet.
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