Survey of Nearby FGK Stars at 160 microns with Spitzer
First Author:
Angelle Tanner
Email: angelle.tanner AT jpl.nasa.gov
JPL/SBAR
770 S. Wilson Ave
Pasadena, CA 91125
Coauthors:
Beichman, Charles, NExSci
Bryden, Geoff, JPL
Lawler, Samantha, Wesleyan U.
Abstract
The Spitzer Space Telescope has advanced debris disk science tremendously with the detection of over thirty disks around nearby AFGK and M stars at 24 and 70 micron with MIPS and 8-34 micron with IRS. Here, we present 160 micron observations of a sub-set of these stars. At these wavelengths, the stellar photospheric emission is negligible and any detected emission corresponds to cold dust (~20 K) at distances of 100-200 AU from the star. The Spitzer 160 micron detections suffer from the added complication of a light leak next to the star's position whose flux is proportional to the near-infrared flux of the star. We are able to remove the contamination from the leak and report the 160 micron fluxes for those stars detected at this wavelength. We find four stars (HD 10647, HD 207129, HD 115617 and AU Mic) with excesses at 160 micron and use this additional photometry to constrain the properties of the debris disks around them.
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