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 Title: 

            Near-Infrared Interferometry of YSO Disks

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 Authors:

          J. Monnier, U. of Michigan

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 Abstract:

Near-infrared interferometry has opened new windows into studies of Herbig Ae/Be and T Tauri stars by directly resolving the hot dust emission at the inner edge of the accretion disks. I will begin by reviewing the initial survey work which determined the characteristic sizes of Herbig Ae/Be stars and the emergence of the "optically-thin" cavity model to explain the unexpectedly-large size results. Recent work has concentrated on exploring a wide range of stellar spectral types (T Tauri up to high-luminosity B0 stars) and in searching for elongation of the emission expected for disks. I will also present initial results of the first "closure phase" study of YSOs, sensitive to the "skewed" disk emission which is predicted by some new disk models. The next phase of investigation will be aperture synthesis imaging of the inner disks using CHARA and VLTI interferometers, and I will give a progress report.

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