Title:

The Infrared Spectral Energy Distributions of Starforming Galaxies




Anna Sajina
University of British Columbia




Abstract:


We combine Spitzer archival data with previous optical, near-IR,
far-IR, and sub-mm observations of a sample of 30 FIRBACK galaxies.
This sample is representative of the brightest 10% of the Cosmic
Infrared Background contributors, and covers z~0-1 and logL~9-12Lsun.
We take advantage of this unprecedented spectral coverage to fit a
multi-component empirical ~1-1000um SED (spectral energy distribution)
model for starforming galaxies. We compare the results with existing
SED templates and discuss potential biases in extracting physical
characteristics such as IR luminosities, and SFRs among others.
MCMC is used to derive the uncertainties and explore correlations.
Lastly, we discuss the implications of this study for understanding
the new population of faint Spitzer 24micron sources.