An Inner Hole in the Disk around TW Hydrae Resolved in 7 Millimeter Dust Emission

Details An Inner Hole in the Disk around TW Hydrae Resolved in 7 Millimeter Dust Emission An Inner Hole in the Disk around TW Hydrae Resolved in 7 Millimeter Dust Emission

2007-04-18

arxiv.org/abs/0704.2422v1

Astrophys.J.664:536-542,2007

Astronomy and Astrophysics

Astrophysics

8 pages, 4 figures, accepted by ApJ

Scientific paper

10.1086/518885

We present Very Large Array observations at 7 millimeters wavelength that resolve the dust emission structure in the disk around the young star TW Hydrae at the scale of the ~4 AU (~0.16") radius inner hole inferred from spectral energy distribution modeling. These high resolution data confirm directly the presence of an inner hole in the dust disk and reveal a high brightness ring that we associate with the directly illuminated inner edge of the disk. The clearing of the inner disk plausibly results from the dynamical effects of a giant planet in formation. In an appendix, we develop an analytical framework for the interpretation of visibility curves from power-law disk models with inner holes.

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