Mathematics – Logic
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.460...77r&link_type=abstract
The Promise of the Herschel Space Observatory. Eds. G.L. Pilbratt, J. Cernicharo, A.M. Heras, T. Prusti, & R. Harris. ESA-SP 460
Mathematics
Logic
Galaxies: Formation, Stars: Formation, Missions: First
Scientific paper
A simple and versatile parameterized approach to the star formation history allows a quantitative investigation of the constraints from far infrared and submillimetre counts and background intensity measurements. The models include four spectral components: infrared cirrus, an M82-like starburst, an Arp220-like starburst and an AGN dust torus. The 60 micron luminosity function is determined for each chosen rate of evolution using the PSCz redshift data for 15000 galaxies. The proportions of each spectral type as a function of 60 micron luminosity are chosen for consistency with IRAS and SCUBA colour-luminosity relations, and with the fraction of AGN as a function of luminosity found in 12 micron samples. A good fit to the observed counts at 0.44, 2.2, 15, 60, 90, 175 and 850 microns can be found with pure luminosity evolution in all 3 cosmological models investigated: Ωo = 1, Ωo = 0.3 (Λ = 0), and Ωo = 0.3, Λ = 0.7. All 3 models also give an acceptable fit to the integrated background spectrum. The total mass-density of stars generated is consistent with that observed, in all 3 cosmological models.
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