Physics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3410b&link_type=abstract
Spitzer Proposal ID #3410
Physics
Scientific paper
We propose IRS-Stare short-low first order, long-low second order, and long-low first order spectra of 16 individual young star clusters in 5 nearby galaxies to study the local impact that these clusters have on their interstellar medium (ISM) in terms of dust/PAH destruction or creation. Massive stars in these young (0-10 Myr) star clusters drive a galaxy's evolution and determine the state of its ISM. From the proposed spectra, we will determine: 1) when dust produced by supernovae is prevalent in a cluster?s evolution, 2) how the dust/PAH mid- infrared properties evolve over 3-10 Myr, and 3) if hot dust is responsible for H-K color excesses observed in young star clusters. Our Spitzer results will aid in the interpretation of dust found in low-metallicity high-redshift galaxies by providing a timescale for dust infusion into the ISM and will provide an evolutionary sequence of young star clusters based on their mid-IR spectra.
Buckalew Brent
Kobulnicky Henry
Wolfire Mark
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