Models for infrared and submillimetre counts and backgrounds
| dc.creator | Rowan-Robinson, M. | |
| dc.date | 2000-12-01 | |
| dc.date.accessioned | 2026-07-25T17:58:41Z | |
| dc.description | 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 $μ$m 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 $μ$m 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 $μ$m samples. A good fit to the observed counts at 0.44, 2.2, 15, 60, 90, 175 and 850 $μ$m can be found with pure luminosity evolution in all 3 cosmological models investigated: $Ω_o$ = 1, $Ω_o$ = 0.3 ($Λ$ = 0), and $Ω_o$ = 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. | |
| dc.description | 15 pages, 11 figs. to appear in 'The Extragalactic Infrared Background and its Cosmological Implications', IAU Symposium 204, eds M.Harwit and M.G.Hauser | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0012024 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0012024 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/52485 | |
| dc.subject | Astrophysics | |
| dc.title | Models for infrared and submillimetre counts and backgrounds | |
| dc.type | text |