Spitzer view on the evolution of star-forming galaxies from z=0 to z~3

Details Spitzer view on the evolution of star-forming galaxies from z=0 to z~3 Spitzer view on the evolution of star-forming galaxies from z=0 to z~3

2005-05-05

arxiv.org/abs/astro-ph/0505101v1

Astrophys.J.630:82-107,2005

Astronomy and Astrophysics

Astrophysics

28 pages, 17 figures, accepted for publication in ApJ

Scientific paper

10.1086/431894

We use a 24 micron selected sample containing more than 8,000 sources to study the evolution of star-forming galaxies in the redshift range from z=0 to z~3. We obtain photometric redshifts for most of the sources in our survey using a method based on empirically-built templates spanning from ultraviolet to mid-infrared wavelengths. The accuracy of these redshifts is better than 10% for 80% of the sample. The derived redshift distribution of the sources detected by our survey peaks at around z=0.6-1.0 (the location of the peak being affected by cosmic variance), and decays monotonically from z~1 to z~3. We have fitted infrared luminosity functions in several redshift bins in the range 01.e11 L_sun) to the total SFR density increases steadily from z~0 up to z~2.5, forming at least half of the newly-born stars by z~1.5. Ultraluminous infrared galaxies (L_TIR>1.e12 L_sun) play a rapidly increasing role for z>~1.3.

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