Evidence for a Developing Gap in the Disk of TW Hydrae

Details Evidence for a Developing Gap in the Disk of TW Hydrae Evidence for a Developing Gap in the Disk of TW Hydrae

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..324..205c&link_type=abstract

Debris Disks and the Formation of Planets: A Symposium in Memory of Fred Gillett, ASP Conference Series, Vol. 324, Proceedings o

Astronomy and Astrophysics

Astronomy

2

Scientific paper

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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