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Oliver Schuetz |
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"Astromineralogy of
Circumstellar Disks" |
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I present an analysis of the 10 micron silicate emission feature for a sample of 28 pre-main sequence and Vega-type objects, obtained with TIMMI2 at La Silla. For several targets the existence of circumstellar matter was proven by these observations. In addition, new circumstellar disks were discovered. The observed 10 micron features are modeled with silicate emission of different grain sizes and composition, to determine the status of dust processing in these disks. For the first time also evidence of PAH processing occurring in a T Tauri star was found. The trends observed in this dust analysis are set in comparison to previous dust studies of young stellar objects. |