Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-12-14
MNRAS 394, 117 (2009)
Astronomy and Astrophysics
Astrophysics
Accepted for publication MNRAS
Scientific paper
10.1111/j.1365-2966.2008.14339.x
A new model for source counts from 8-1100 $\mu$m is presented, which agrees well with source-count data and the observed background spectrum. The model is similar to that of Rowan-Robinson (2001), but with different evolution for each of the four assumed infrared template types. The evolution is modified in two ways; (i) the exponential factor is modified so that it tends to a constant value at late times, (ii) the power-law factor is modified so that it tends to zero at redshift z_f, rather than 0 as assumed by Rowan-Robinson (2001). I find strong evidence from the 850 and 1100 mum counts, and from the infrared background, that z_f = 4-5, with some preference for a value at the low end of the range, implying that star-forming galaxies at z > 5 are not significant infrared emitters, presumably due to a low opacity in dust at these early epochs. The model involves zero or even negative evolution for starbursts and AGN at low redshifts (<0.2), suggesting that the era of major mergers and strong galaxy-galaxy interactions is over.
No associations
LandOfFree
A new model for infrared and submillimetre counts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new model for infrared and submillimetre counts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new model for infrared and submillimetre counts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-250027