Ultradense HII Regions in He2-10

Details Ultradense HII Regions in He2-10 Ultradense HII Regions in He2-10

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..369c&link_type=abstract

NOAO Proposal ID #2001A-0369

Physics

Scientific paper

We will use Gemini to observe the newly discovered ``ultradense HII regions'' in the starburst galaxy He 2-10 at mid-IR wavelengths. These giant, dense HII regions harbor the youngest massive star clusters yet observed. First identified as optically thick free-free radio sources, these ultra-young clusters are are still embedded in their birth material and are completely opaque at optical and near-infrared regimes. They can be observed only at mid-IR to radio wavelengths. Observations at 10 and 18 microns with OSCIR on Gemini will allow us to investigate the physical conditions under which massive star clusters form by directly detecting emission from the warm dust and ionized gas associated with these clusters at high spatial resolution. These observations will also enable us to determine what fraction of the total IR flux from He 2-10 is due to the enshrouded clusters.

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