Computer Science
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40844m&link_type=abstract
Spitzer Proposal ID #40844
Computer Science
Scientific paper
The Spitzer Space Telescope is making major contributions to our understanding of the structure, composition, thermal state, and evolution, of circumstellar disks around young stars through numerous observing projects. Among the most important of these are large-scale mapping surveys of the nearest molecular clouds, where Spitzer achieves its greatest sensitivity to low mass stars and brown dwarfs, and where it provides its best linear resolution. At wavelengths < 24 microns, the c2d and Taurus Legacy projects have produced datasets that are 2-3 orders of magnitude more sensitive than IRAS or ground-based work. But at 70 microns, a key wavelength that probes disk structure near 10 AU and which is sensitive to a large fraction of the disk luminosity, these surveys have bettered IRAS sensitivity by only a factor of five. We propose to augment the Spitzer Legacy datasets for Taurus and Lupus, two nearby clouds with low cirrus emission, by performing dedicated MIPS 70 micron photometry observations of 113 young stars identified from the shorter wavelength data, and for which no 70 micron source was detected in the existing shallow survey data. These new observations will provide a 5-10x improvement in sensitivity over the existing Legacy data sets, significantly enhancing their value for a wide range of star formation and disk science. The results will be delivered to the SSC Archive in early 2009.
Evans Neal Jr.
Harvey Paul
McCabe Caer-Eve
Menard Francois
Merín Bruno
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