Other
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80024b&link_type=abstract
Spitzer Proposal ID #80024
Other
Scientific paper
The Galactic Census of High- and Medium-mass Protostars (CHaMP) is a large, unbiased, and panchromatic survey of the formation and early evolution of stars and star clusters covering 20 by 6 deg. of the Galactic Plane. The survey is based on a complete sample of ~300 dense (HCO+ J=1-0 emitting) gas clumps, selected by a recursive mapping of the peaks of 12CO, 13CO, and C18O emission, and then mapped by the Mopra radio telescope in a multitude of molecular transitions. Thus, for the first time we have a full census of the dense gas structures in a large volume of the Milky Way. The goal of this proposal is to use Warm Spitzer to characterize the star formation activity in this entire sample, probing the complete range of dense gas environments. We can resolve the formation of individual stars, but at the same time the full dataset will give us a measure of the global star formation activity of a large portion of the Milky Way, and the range of star formation efficiencies exhibited by molecular clouds. In particular, Spitzer data will: 1. Yield a complete census of any Young Stellar Objects in each clump down to about a solar mass, including their spatial distributions. 2. Combined with other infrared data, allow systematic measurements of the properties of any embedded clusters, including luminosity and mass functions, broad-band spectral classification, protostellar and disk fractions, outflow indicators, and how these vary with cluster mass and density. 3. Combined with mm data, permit a detailed comparison of the embedded stellar populations with their natal dense gas to derive star formation efficiencies and feedback effects.
Barnes Peter
Hopkins Andrew
Lada Elizabeth
Ma Bo
O'Dougherty Stefan
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