Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329..279l&link_type=abstract
Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Using deep observations of the Chandra Deep Field South obtained with MIPS at 24μm, we present our preliminary estimates on the evolution of the infrared (IR) luminosity density of the Universe from z=0 to z˜1. We find that a pure density evolution of the IR luminosity function is clearly excluded by the data. The characteristic luminosity LIR* evolves at least by (1+z)3.5 with lookback time, but our monochromatic approach does not allow us to break the degeneracy between a pure evolution in luminosity, or an evolution in both density and luminosity. Our results imply that IR-luminous systems (LIR ≥ 1011 L&sun;) become the dominant population contributing to the co-moving IR energy density beyond z ˜ 0.5-0.6. The uncertainties affecting our measurements are largely dominated by the poor constraints on the spectral energy distributions that are used to translate the observed 24μm flux into luminosities.
Bell Eric
Dole Herve
Egami Eiichi E.
Le Floc'h Emeric
Papovich Casey
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