Computer Science
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3280w&link_type=abstract
Spitzer Proposal ID #3280
Computer Science
Scientific paper
We propose a spectrophotometric investigation of starburst activity in the Local Group galaxy, Messier 33. By observing 7 selected giant HII regions that span a decade in metallicity, we will test the generic relationships between the ionizing stellar populations (previously observed with HST), the photo-dissociation regions (PDRs), and their associated dust content. We are especially interested in determining whether the observed variations in the stellar IMFs correlate with variations in the PDRs. We will use the IRS to obtain fully-sampled spectral maps of the 7 selected HII regions at 5.2 ==> 14.5 microns. The resulting datacubes will contain abundant spatial and spectral information on the molecular and dust content in the PDRs. This research program -- in close coordination with complementary GTO programs #5 and #63 -- will provide important benchmarks for interpreting starburst activity on many scales and over many epochs.
Boulanger Francois
Brandl Bernhard
Garnett Donald
Gehrz Robert
Gehrz and other GTO Team Members
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