Dust Properties in Low-Metallicity Galaxies

Details Dust Properties in Low-Metallicity Galaxies Dust Properties in Low-Metallicity Galaxies

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30732r&link_type=abstract

Spitzer Proposal ID #30732

Computer Science

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Scientific paper

Star formation and galaxy evolution in low metallicity environments is a central issue in astronomy. The formation and evolution of the first stars and galaxies occurred in such environments. Learning about them can also reveal the dependencies on heavy element production that lead to the current conditions. To probe these issues, we will observe a sample of low-metallicity galaxies with all three Spitzer instruments. Our first goal is to understand the behavior of the interstellar dust as the availability of heavy elements decreases, including the major changes in strength of the aromatic feature that we have documented in previous work. In addition to its intrinsic interest, this study will help interpret Spitzer measurements at high redshift, where the aromatic features (when they are still present) fall in the MIPS 24 micron band.

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