Other
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10228k&link_type=abstract
HST Proposal ID #10228
Other
Hst Proposal Id #10228 Ism
Scientific paper
We propose to conduct a comprehensive high angular resolution study of the newly discovered debris disk around GJ 803. This nearby, young star has an estimated age of 8-20 Myr, a critical epoch in disk evolution and planet formation. By virtue of its proximity {10 pc} and nearly edge-on orientation, GJ 803's disk has an exceptional surface brightness and angular size relative to other disks resolved in scattered light thus far. Hence, this system offers an exciting new opportunity to study debris disks. Our proposed ACS and NICMOS imaging will elucidate the disk morphology, ascertain the grain properties as a function of radius, and search for fine dynamical structure indicative of the presence of planets. ACS WFC and NICMOS coronagraphic imaging will explore the inner disk, which includes the 17 AU inner disk hole inferred from the star's spectral energy distribution. Complementary ACS WFC imaging will probe the outer disk {>70 AU}; at such large distances around GJ 803, dust evolutionary timescales are longer than the stellar age, and hence we can study the composition of primordial circumstellar material. The combined dataset will provide the most comprehensive study to date of a debris disk from 7 AU to 200 AU radius.
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