Dust Properties in Bright, Nearby Debris Disks

Details Dust Properties in Bright, Nearby Debris Disks Dust Properties in Bright, Nearby Debris Disks

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30156r&link_type=abstract

Spitzer Proposal ID #30156

Physics

Scientific paper

While many debris disks have now been identified with Spitzer, the properties of the dust in these systems remain for the most part unexplored. An initial detection of excess at a single wavelength provides only an upper limit on dust temperature and a lower limit on the dust luminosity. With additional spectral information, the distribution of dust temperatures can be modeled in greater detail. With some assumptions for the grain properties, the orbital location of the dust can also be determined. A well-defined dust SED provides a direct assessment of the range of dust temperatures and can distinguish dust orbiting in a ring-like configuration from dust in a broadly dispersed disk. From several GTO and GO programs, we have identified the brightest nearby debris disks. We propose to use MIPS-SED spectra to determine the range of dust temperatures in these systems. Knowledge of the dust temperature distribution will greatly increase our understanding of each of these systems, from the dust grain properties up to the overall debris disk architecture.

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