Journal
ASTROPHYSICAL JOURNAL
Volume 784, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/784/1/83
Keywords
dust, extinction; galaxies: active; galaxies: star formation; infrared: ISM
Categories
Funding
- NASA
- Sloan Digital Sky Survey (SDSS)
- NSF
- NSF, the U. S. Department of Energy, NASA
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- National Aeronautics and Space Administration and the National Science Foundation
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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/active galactic nucleus (AGN) diagnostics based on polycyclic aromatic hydrocarbon equivalent widths and broadband infrared colors are presented, and example mid-infrared AGN fractional contributions are estimated from model fits to the Great Observatories All-Sky LIRG Survey sample of nearby U/LIRGS and the Five mJy Unbiased Spitzer Extragalactic Survey sample of 24 mu m selected sources at redshifts 0 less than or similar to z less than or similar to 4.
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