AAS 205th Meeting, 9-13 January 2005
Session 17 Ae Be and Debris Disks: Searches Lead to High Angular Resolution Studies
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[17.07] Mid-Infrared Spectra of Dust Debris around Main-Sequence Stars

C. H. Chen (JPL), G. C. Sloan (Cornell), L. D. Keller (Ithaca College), M. Jura (UCLA), W. J. Forrest, D. M. Watson (Rochester), IRS Disks Team

We report spectra obtained with the \emph{Spitzer Space Telescope} in the \lambda = 5 - 35 \mum range around some ~100 nearby main-sequence stars with infrared excesses. The stars with strong dust emission show no recognizable spectral features, suggesting that the bulk of the emitting particles have diameters larger than 10 \mum. We present possible models for the spatial distribution of the dust including continuous disks (for example disks whose surface density distributions are determined by the Poynting-Robertson Effect) and single temperature grains. We infer minimum masses of the parent body population if the observed dust results from collisional grinding of larger solids.

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.