Spectral Energy Distributions of Star-Forming Galaxies, from Low Metallicity to Ultraluminous Infrared Galaxies

Details Spectral Energy Distributions of Star-Forming Galaxies, from Low Metallicity to Ultraluminous Infrared Galaxies Spectral Energy Distributions of Star-Forming Galaxies, from Low Metallicity to Ultraluminous Infrared Galaxies

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20176e&link_type=abstract

Spitzer Proposal ID #20176

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Scientific paper

We propose to use the MIPS spectral energy distribution (SED) mode to generate high-resolution SEDs for a sample of nearby, energetically star-forming galaxies. These data will be used to measure the luminosities, temperatures and dust masses of the galaxies, and to determine to what extent multiple dust components are required to fit the SED. We will combine the new data with photometric and spectroscopic data from Spitzer and from the literature to generate SED templates to aid in photometric redshift measurements or in interpretation of other galaxies for which only photometry is available. By observing starburst, ultraluminous, and low-metallicity galaxies we will fill a critical gap in the SED coverage of galaxies provided by existing Spitzer programs. The galaxies we will observe are the very ones that dominate the extragalactic infrared emission and dominate the number counts of distant galaxies. The MIPS SED mode provides unprecedented sensitivity and precision to measure the infrared emission peak in these galaxies, in particular allowing for the first time detailed far-infrared (FIR) measurements of faint, low-metallicity galaxies. The SED wavelength coverage (55 - 96 micron) is ideally positioned to measure the emission peak in these galaxies.

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