Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-04-11
Astronomy and Astrophysics
Astrophysics
To appear in the proceedings of "The Spitzer Science Center 2005 Conference: Infrared Diagnostics of Galaxy Evolution", Pasade
Scientific paper
We present the results of our most recent works on Spitzer/MIPS 24 micron galaxies. Through a multiwavelength analysis, we study different properties (redshifts, luminosities, stellar masses) characterising the sources which produce the bulk of the mid-IR background. From a comparative study with the total population of Ks-selected galaxies, we determine that 24 micron sources account for an important fraction of the most massive galaxies present at different redshifts. On the other hand, we determine that 24 micron galaxies also produce most of the energy contained in the far-IR cosmic background at 70 and 160 microns. Furthermore, we are able to set tight constraints on the Cosmic Infrared Background (CIB) spectral energy distribution (SED). Our results help to clarify the links between these presumably different IR galaxy populations.
Caputi Karina I.
Dole Herve
Lagache Guilaine
Puget Jean-Loop
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