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Paper: Mid- to Far-Infrared Correlations at z ∼ 1 in GOODS
Volume: 381, The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution
Page: 327
Authors: MacDonald, E.C.; Dickinson, M.E.; Morrison, G.E.
Abstract: At present, most investigations of high redshift star formation using Spitzer (or ISO) mid-IR data adopt mid- to far-IR correlations derived from local galaxy samples. Direct tests of these correlations at high redshift are scarce. In fact, IR galaxies at high z may have spectral energy distributions that differ significantly from those of local galaxies, rendering a simple redshifting of local IR SED’s inappropriate. The Great Observatories Origins Deep Survey, with its multiwavelength data set, allows for the comparison of high redshift IR galaxies with local galaxies. More specifically, the work presented here uses recently obtained VLA radio data and MIPS 24μm data to derive the relation between 12μm emission and the bolometric IR luminosity (LIR) for a large sample of galaxies at z ∼ 1. Locally, a well-defined tight correlation is known to exist, however at z of 1 there appears to be evidence for a population of IR galaxies that does not adhere to this relationship. These proceedings presents these results, along with a discussion of the nature of IR galaxies at z ∼ 1, and the validity of using model SED’s derived from local IR galaxies at higher redshifts.
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