<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "High-resolution studies of protoplanetary disks"^^ . "This work presents a multi-wavelength search (near-IR, mid-IR, mm) for previously unknown circumstellar disks and a study of those disk candidate objects which are not yet well characterised in the literature. 22 candidate stars, most of these constituting known exoplanet systems, were examined for circumstellar material using the Adaptive Optics instrument ADONIS at La Silla Observatory (Chile). With the new Adaptive Optics system NAOS-CONICA at Paranal (Chile) we tested the technique of Polarimetric Differential Imaging. Advances in mid-IR data reduction were achieved, e.g., a method was developed to correct the chromatic and airmass dependent extinction. We show new N-band photometry and spectra for eight pre-main sequence stars, six main sequence stars and one post-MS object using the TIMMI2 camera at La Silla, and model the emission spectra with a mixture of silicates consisting of different grain sizes and composition. The most important result thereof is the discovery of two previously unknown circumstellar disks around HD 72106 and HD 113766. Both objects are host to highly processed silicates, resembling those found in solar-system comets. We further present the first observational confirmation for an extended circumstellar dust disk around epsilon Eri obtained with the bolometer array SIMBA at the 15m radio telescope SEST in La Silla and demonstrate that the previously claimed disk substructure may alternatively be explained by remnant noise effects."^^ . "2005" . . . . . . . . "Oliver"^^ . "Schütz"^^ . "Oliver Schütz"^^ . . . . . . "High-resolution studies of protoplanetary disks (PDF)"^^ . . . "diss.pdf"^^ . . . "High-resolution studies of protoplanetary disks (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "High-resolution studies of protoplanetary disks (Other)"^^ . . . . . . "preview.jpg"^^ . . . "High-resolution studies of protoplanetary disks (Other)"^^ . . . . . . "medium.jpg"^^ . . . "High-resolution studies of protoplanetary disks (Other)"^^ . . . . . . "small.jpg"^^ . . . "High-resolution studies of protoplanetary disks (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #5453 \n\nHigh-resolution studies of protoplanetary disks\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . .