Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sptz.prop70157a&link_type=abstract
Spitzer Proposal ID #70157
Physics
Scientific paper
Empirical scaling laws relating star formation rates to gas surface density in external galaxies are widely observed, but the underlying physics of what controls the rate and efficiency of star formation is not well understood. This is especially true for distant galaxies in which individual star forming regions, much less individual stars, cannot be resolved. Massive star forming regions in the 4th quadrant of our galaxy have the highest far-infrared luminosities, and the highest apparent star formation efficiencies, in the Galactic disk. They are the local analogs of the star forming regions which dominate the integrated light from the spiral arms of external galaxies. We aim to bridge the gap between star-forming regions near the Sun and in nearby galaxies, by imaging nine infrared-luminous, massive star forming regions in the 4th quadrant of the Milky Way. These data will be combined with deep H and K band imaging to derive star formation rates and efficiencies as well as molecular cloud masses and densities, for comparison with nearby clouds and external galaxies in the context of star formation rate - gas surface density relations.
Allen Lori
Gutermuth Rob
Marengo Massimo
Megeath Tom
Willis Sarah
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