10 $\mu$m interferometry of disks around young stars

Abstract

This contribution reviews results from interferometric observations of circumstellar disks around young stars of $\lesssim$3 M${}_{\odot }$, performed with the MIDI instrument operating in the 10 $\mu$m spectral region. Two main topics, the disk structure on $\sim$1-10 AU scales and the dust properties in the same region, are illustrated with several examples of MIDI studies, covering various evolutionary stages. The spatially resolved observations largely confirm SED-only based hypotheses on disk structure, yet also reveal degeneracies that may occur in such SED modeling. The properties of the dust on the disk surface show a strong radial dependence: the dust close to the central star has generally larger grain sizes and in particular a much higher crystallinity than the dust in more remote disk regions.

13 pages, 7 figures, invited review, conference "The Universe under the Microscope - Astrophysics at High Angular Resolution", Bad Honnef, April 2008

References in corpus (3)

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