Paper:	Stellar Content of Ultra-Compact HII Regions Using Spitzer/MIPS
Volume:	388, Mass Loss from Stars and the Evolution of Stellar Clusters
Page:	165
Authors:	Furness, J.P.; Crowther, P.A.; Rho, J.; Conti, P.S.
Abstract:	We report new Spitzer observations which are used to constrain the stellar content of 28 UC HII regions. High spatial resolution MIPS 70μm observations sample the peak of the re-radiated dust energy distribution from UC HII regions. From these we produce refined IR luminosities which are used to deduce the multiplicity of source in the UC HII region. We find that stellar clusters with a high-mass Salpeter initial mass function are the most likely sources of these regions.

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