Computer Science
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20742c&link_type=abstract
Spitzer Proposal ID #20742
Computer Science
Scientific paper
We report the first scattered light detections of two debris disk around an F star and a K star using optical coronagraphy and the Hubble Space Telescope. With ages ~1 Gyr, these are the oldest debris disks thus far seen in the optical. We have discovered ring-like structure and azimuthal asymmetry that can be linked to dynamical perturbations of yet-undetected planetary companions. We propose deep, multi-roll angle IRAC imaging with SST to search for substellar objects, to constrain the presence of a warm dust component in the disk, and to identify its spatial location within the disk's structure. MIPS photometry will be employed to anchor the spectral energy distribution of the disks at longer wavelengths. Since these debris disks are close to our Kuiper Belt in an evolutionary context, detailed understanding of their mass, structure and composition will provide a fresh perspective for inferring the history and properties of our own trans-Neptunian region.
Clampin Mark
Graham James
Kalas Paul
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