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 Title: 

            Observing inner disks where planets form

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 Authors:

          Regis LaChaume, MPIfR Bonn, Germany

          Fabien Malbet, LAOG, Grenoble University, France

          Jean-Louis Monin, LAOG Grenoble University, France

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 Abstract:

            Near infrared interferometry is on the wedge of revolutionizing our current view of the inner part of protoplanetary disks. With baselines larger than 100m, sensitivity down to TTauri near IR magnitude in the nearest star formation regions and spectral resolution from 1 to 2.5 microns, the VLTI/AMBER instrument will unveil the inner half AU in dozen of circumstellar disks.

            Recent results have shown that such observations used in conjunction with detailed accretion disks models can provide invaluable input on the physical parameters of the disk. In particular, the use of the interferometric visibility together with the SED can discriminate between disks models (Lachaume et al. 2003, A&A 400, 185).

          We will present new results of our model of the inner part of TTauri disk used to interpret AMBER results, fitting simultaneously interferometric visibilities and spectral energy distributions. We will show how AMBER observations can provide not only fundamental parameters like disk inclination, position angle and accretion rate, but also, using  spectral resolution available on the instrument, can be used to check disk asymmetries possibly due to inner  planet formation.

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