Mid- to Far-Infrared Correlations at z ∼ 1 in GOODS
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 multi-wavelength 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 24μ m data to derive the relation between 12μ m emission and the bolometric IR luminosity (L_{IR}) 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.
- Publication:
-
Infrared Diagnostics of Galaxy Evolution
- Pub Date:
- March 2008
- Bibcode:
- 2008ASPC..381..327M