J. A. Eisner et al 2006 ApJ 637 L133 doi:10.1086/500689
J. A. Eisner1,2, E. I. Chiang1,3 and L. A. Hillenbrand4
Show affiliationsWe present Keck Interferometer observations of TW Hya that spatially resolve its emission at 2 μm wavelength. Analyzing these data together with existing K-band veiling and near-infrared photometric measurements, we conclude that the inner disk consists of optically thin, submicron-sized dust extending from ~4 AU to within 0.06 AU of the central star. The inner disk edge may be magnetospherically truncated. Even if we account for the presence of gas in the inner disk, these small dust grains have survival times against radiation blowout that are orders of magnitude shorter than the age of the system, suggesting continual replenishment through collisions of larger bodies.
planetary systems: protoplanetary disks; stars: individual (TW Hydrae); stars: pre-main sequence
Issue 2 (2006 February 1)
Received 2005 December 1, accepted for publication 2005 December 27
Published 2006 January 18
J. A. Eisner et al 2006 ApJ 637 L133
A. Verdini et al 2009 ApJ 700 L39
J. A. Eisner et al. 2007 ApJ 657 347
J. A. Eisner et al. 2005 ApJ 623 952
J. A. Eisner et al 2007 ApJ 654 L77
Stanimir A. Metchev et al. 2005 ApJ 622 451
J. A. Eisner et al. 2005 ApJ 635 396
J. A. Eisner et al. 2002 ApJ 569 334
J. A. Eisner et al. 2008 ApJ 683 304
A. Buscarino et al 2008 EPL 82 38002