Evolution of the dusty infrared luminosity function from z=0 to z=2.3 using observations from Spitzer

Understand

We derive the evolution of the infrared (IR) luminosity function (LF) over the last 4/5ths of cosmic time, using deep 24um and 70um imaging of the GOODS North and South fields.

• We use an extraction technique based on prior source positions at shorter wavelengths to build the 24 and 70um source catalogs.
• The majority (93%) of the sources have a spectroscopic (39%) or a photometric redshift (54%) and, in our redshift range of interest (i.e., 1.3<z<2.3) ~20% of the sources have a spectroscopic redshifts.
• To extend our study to lower 70um luminosities we perform a stacking analysis and we characterize the observed L_24/(1+z) vs L_70/(1+z) correlation.