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Title:
Spitzer Survey of Nearby Debris Disks at 160 Microns
Authors:
Tanner, Angelle M.; Beichman, C.; Bryden, G.; Lawler, S.
Affiliation:
AA(JPL/IPAC), AB(MSC), AC(JPL), AD(Wesleyan)
Publication:
American Astronomical Society, AAS Meeting #211, #50.17; Bulletin of the American Astronomical Society, Vol. 39, p.814
Publication Date:
12/2007
Origin:
AAS
Bibliographic Code:
2007AAS...211.5017T

Abstract

Over the past four years the Spitzer Space Telescope has discovered an entirely new sample of debris disks around nearby AFGK & M stars both old and new. Out of 350 stars observed to date, the majority of the excesses due to thermal emission from debris disks have been found at 70 microns with only a few also at 24 microns. Here, we report the results from a sub-sample of stars also observed at 160 microns. Special care must be taken when estimating stellar excesses in this data set due to a near-infrared light leak a few pixels to the right of the star. Six stars with 70 micron excesses also have excesses at 160 microns corresponding to cold dust at distances greater than100 AU. No stars have only 160 micron excesses. We fit simple dust models to the Spitzer/MIPS 24, 70 and 160 micron photometry and IRS spectroscopy and utilize knowledge of the extent of the dust at 70 microns for those stars which are resolved at this wavelength.
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