Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1305s&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #13.05; Bulletin of the American Astronomical Society, V
Other
1
Scientific paper
Bright, nearby stars with infrared excess offer the best prospects for detailed studies of debris disk structure and dust grain properties. The "Fabulous Four" debris disks (Vega, Fomalhaut, β Pic, and ɛ Eri) were resolved by IRAS and have already been intensively studied with the Spitzer Space Telescope. In this contribution, we report on Spitzer imaging of a dozen other nearby, IRAS-selected debris disks with the potential to be spatially resolved in the MIPS 70 μm fine scale channel. The sample consists of nine A type stars (α CrB, β Leo, β UMa, δ Vel, ηTel, γ Oph, γ Tri, τ3 Eri, and ζ Lep) and three solar-type stars (τ Ceti, σ Boo, and 61 Cyg). The dataset includes MIPS imaging photometry at 24, 70, and 160 μm 55-90 μm MIPS SED mode measurements for most of the targets; and IRAC imaging of 2/3 of the sample to search for cool companions that might dynamically affect the disks. Only the disk of γ Oph is marginally resolved at 70 μm, with outer radius of 500 AU. Weak IRAS excesses for 61 Cyg and τ3 Eri are not confirmed. Results for the companion search, which has the sensitivity to detect objects as small as 5 Jupiter masses in wide orbits, will be reported.
Support for this work was provided by NASA to the Jet Propulsion Laboratory, California Institute of Technology.
Beichman Charles Arnold
Bryden Geoff
Carson John C.
Rieke George H.
Spitzer MIPS Instrument Team
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