Computer Science
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5356h&link_type=abstract
HST Proposal ID #5356
Computer Science
Hst Proposal Id #5356 Interstellar Medium Circumstellar Matter
Scientific paper
HST will provide the first opportunity to make a detailed, quantitative study of the proto-planetary disk around the nearby A3V star, Beta Pic. WFPC2 and FOC/COSTAR are expected to obtain high-resolution pictures of this system. Even with HST, however, there are severe observational challenges calling for a detector with an enormous dynamic range. In addition, the detector must have a high UV sensitivity and zero red-light leak in order to determine the composition of the dust disk from UV reflectance spectra. In order to meet these daunting observational requirements, we propose an innovative observing technique involving the GHRS. Only the GHRS has the following combination of features which are essential for exploring circumstellar disks: opportunity for narrow-band UV photometry, a huge dynamic range, excellent photometric characteristics, and the capability of imaging spectroscopy. We will capitalize on these benefits to probe the central cavity of the disk, estimate the grain size and composition of the dust, map the circumstllar gas, and search for evidence of planet-sized bodies.
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