Accurate Far-Infrared Spectral Energy Distributions of 60-Micron-Selected Ultraluminous Infrared Galaxies at Redshifts from 0.2 to 1

Details Accurate Far-Infrared Spectral Energy Distributions of 60-Micron-Selected Ultraluminous Infrared Galaxies at Redshifts from 0.2 to 1 Accurate Far-Infrared Spectral Energy Distributions of 60-Micron-Selected Ultraluminous Infrared Galaxies at Redshifts from 0.2 to 1

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20427d&link_type=abstract

Spitzer Proposal ID #20427

Computer Science

Scientific paper

We propose MIPS 160 micron observations of Ultraluminous Infrared Galaxies (ULIRGs) at redshifts z = 0.2 to 1 selected from the Stanford et al. IRAS FSC/FIRST sample. The upper end of the galaxy luminosity function during the period z = 1 to the present day has been studied little, yet this is the redshift interval during which the number of ULIRGs changed by the greatest amount. Our approach is to compile and characterize the complete mid- and far-infrared spectral energy distributions of 21 ULIRGs from which we can derive luminosities and mean dust temperatures to 10% uncertainty and examine dust temperature distributions. The key new information regarding these sources will be MIPS 160 micron photometry (under this GO proposal) accurately defining the spectral peak and IRS spectra (under an independent GTO program) characterizing the warm dust and gas; these data will be combined with existing IRAS 60 and 100 micron photometry and a ground-based 350 micron survey which has already detected half of the sources. We will be able to separate the emission from AGN, starburst, and cirrus components and to study evolutionary trends and correlations between the mid-IR and far-IR spectra.

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