A Two-Parameter Model for the Infrared/Submillimeter/Radio Spectral
  Energy Distributions of Galaxies and AGN
  A two-parameter semi-empirical model is presented for the spectral energy
distributions of galaxies with contributions to their
infrared-submillimeter-radio emission from both star formation and accretion
disk-powered activity. This model builds upon a previous one-parameter family
of models for star-forming galaxies, and includes an update to the mid-infrared
emission using an average template obtained from Spitzer Space Telescope
observations of normal galaxies. Star-forming/AGN diagnostics based on PAH
equivalent widths and broadband infrared colors are presented, and example
mid-infrared AGN fractional contributions are estimated from model fits to the
GOALS sample of nearby U/LIRGS and the 5MUSES sample of 24um-selected sources
at redshifts 0 < z < 2.
