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Title:
An Overview of Cometary and AsteroidalDebris Disks Around Main Sequence Stars
Authors:
Beichman, Charles A.; Bryden, G.; Gautier, N.; Lawler, S.; Werner, M.; Trilling, D.; Stansberry, J.; Su, K.; Siegler, N.; Rieke, G.
Affiliation:
AA(JPL), AB(JPL), AC(JPL), AD(Michelson Science Center, Caltech), AE(JPL), AF(Univ. of Arizona), AG(Univ. of Arizona), AH(Univ. of Arizona), AI(Univ. of Arizona), AJ(Univ. of Arizona)
Publication:
American Astronomical Society, DPS meeting #38, #04.01; Bulletin of the American Astronomical Society, Vol. 38, p.486
Publication Date:
09/2006
Origin:
AAS
Bibliographic Code:
2006DPS....38.0401B

Abstract

A variety of Spitzer programs have investigated the incidence of debris disks around main sequence stars. We summarize the overall properties of the disks and their host stars which include spectral types A-M and ages from 10 Myr to 10 Gyr. Important results include an overall incidence of 13±3% for Kuiper Belt analogs around mature main sequence stars at the Spitzer level of 10 times the level of our zodiacal cloud; typical dust temperatures in the range 70-100 K; the very low incidence (<2%) of stars with hot 300 K dust at the Spitzer limit of 1,000 times the level of our zodiacal cloud; a strong dependence on the incidence of disks with stellar age up to 0.5 Gyr but with little age dependence for older stars; a weak dependence on spectral type for stars hotter than K0, but a surprising lack of excesses for cooler stars; a lack of correlation with metallicity in contrast with the strong correlation between the incidence of planets and metallicity; and an increased incidence of debris disks in binary systems. While many of these correlations will be the subject of individual talks at this meeting, this presentation will give an overall context for the debris disk phenomena, its relationship to the formation and evolution of planetary systems, and the importance of debris disks to the eventual detectability of individual planets.

This work was funded in part by NASA at the University of Arizona and the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

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