Computer Science
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3437c&link_type=abstract
Spitzer Proposal ID #3437
Computer Science
Scientific paper
We propose to conduct a comprehensive study of circumstellar disk emission in the Orion OB1 association using all the instruments on the Spitzer Space Telescope. The Orion OB1 association offers a unique laboratory for understanding disk structure and evolution in a distributed population of low mass young stars over an age range of 1-10 Myr. The pre-main sequence population spread out over 100 square degrees in this region has been well-characterized by our group via an extensive ground-based optical survey. IRAC and MIPS maps of two representative regions with different ages will allow us to study complete spectral energy distributions out to 24 microns, diagnosing the structure of circumstellar disks from the strength and shape of the excess infrared continuum emission. Additional IRS spectra of a small sample of objects with existing ground-based mid-IR detections will provide more detailed information about the dust content of the disks. In combination with detailed modeling, the data will provide key insights into the processes affecting disk evolution in a non-clustered environment with nearby massive stars, including effects such as dust settling and inside-out clearing which are critical influences on planet formation.
Briceno Cesar
Calvet Nuria
D'Alessio Paola
Hartmann Lee
Muzerolle James
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