2004/03/10 by F. Pozzi, C. Gruppioni, Seb Oliver +9 · 5 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Infrared #Luminosity #Luminosity function #Luminous infrared galaxy #Physics #Population #Redshift #Spiral galaxy #Star formation #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/420963
published as Astrophys.J. 609 (2004) 122 · 35 pages, accepted by ApJ
arxiv created 2004/03/10 · openalex publication_date 2004/06/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the first determination of the 15 μm luminosity function of galaxies from the European Large Area ISO Survey (ELAIS) southern fields. We have adopted a new criterion to separate the quiescent, nonevolving and the starburst, evolving populations based on the ratio of mid-infrared to optical luminosity. Strong evolution is suggested by our data for the starburst galaxy population, while normal spiral galaxies are consistent with no evolution. The starburst population must evolve both in luminosity and in density with rates of the order L ( z ) ∝ (1 + z ) 3.5 and ρ( z ) ∝ (1 + z ) 3.8 , respectively, up to z ~ 1. The evolutionary parameters of our model have been tested by comparing the model predictions with other observables, like source counts at all flux density levels (from 0.1 to 300 mJy) and redshift distributions and luminosity functions at high z (0.7 < z < 1.0 from Hubble Deep Field North [HDF-N] data). The agreement between our model predictions and the observed data is remarkably good. We use our data to estimate the star formation density of the universe up to z = 0.4, and we use the luminosity function model to predict the trend of the star formation history up to z = 1.