Spitzer Mid-to-Far-Infrared Flux Densities of Distant Galaxies

Understand

We study the infrared (IR) properties of high-redshift galaxies using deep Spitzer 24, 70, and 160 micron data.

• Our primary interest is to improve the constraints on the total IR luminosities, L(IR), of these galaxies.
• We combine the Spitzer data in the southern Extended Chandra Deep Field with a K-band-selected galaxy sample and photometric redshifts from the Multiwavelength Survey by Yale-Chile.
• We used a stacking analysis to measure the average 70 and 160 micron flux densities of 1.5 < z < 2.5 galaxies as a function of 24 micron flux density, X-ray activity, and rest-frame near-IR color.