AAS 204th Meeting, June 2004
Session 33 Early Science Results from the Spitzer Space Telescope
Topical Session, Tuesday, June 1, 2004, 8:30-10:00am, 10:45am-12:30pm, 2:30-4:00pm, 4:15-6:00pm, 601

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[33.18] The Formation and Evolution of Planetary Systems: First Results from a Spitzer Legacy Science Program

M. R. Meyer (U. Arizona), Spitzer Legacy Science Program ``Formation and Evolution of Planetary Systems" Collaboration

We present photometry from 3-160 microns obtained with the IRAC and MIPS instruments and low resolution spectro-photometry from 4-35 microns obtained with the IRS for the first targets observed from the Spitzer Legacy Science Program "Formation and Evolution of Planetary Systems". We also present high resolution spectroscopic observations from the IRS for a subset of our sample capable of detecting emission features from warm circumstellar atomic and molecular gas. We report new detections at 70 and 160 microns of the candidate debris disk around HD 105 (G0V, approximately 30 Myr old) as well as a newly discovered debris disk surrounding HD 150706 (G3V, approximately 1 Gyr old). We also place preliminary upper limits on the remnant molecular gas in the disk surrounding HD 105. Of four targets without previously known IR excess, the detection of one source amongst the older of the targets selected, suggests a dispersion in initial conditions or evolutionary paths for debris disks surrounding solar-type stars.

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The author(s) of this abstract have provided an email address for comments about the abstract: mmeyer@as.arizona.edu

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