The Herschel-ATLAS: Evolution of the 250um luminosity function out to z=0.5
S. Dye, L. Dunne, S. Eales, D.J.B. Smith, A. Amblard, R. Auld, M., Baes, I.K. Baldry, S. Bamford, A.W. Blain, D.G. Bonfield, M. Bremer, D., Burgarella, S. Buttiglione, E. Cameron, A. Cava, D.L. Clements, A. Cooray, S., Croom, A. Dariush, G. de Zotti, S. Driver, J.S. Dunlop
TL;DR
This study measures the evolution of the 250um luminosity function of galaxies up to redshift 0.5, showing a steady increase in luminosity density over time using Herschel-ATLAS data.
Contribution
First to analyze the 250um luminosity function evolution out to z=0.5 using Herschel-ATLAS data, revealing a smooth increase in luminosity density.
Findings
Luminosity function evolves steadily up to z=0.5.
Luminosity density increases by a factor of about 3.6 at z=0.2.
Supports models of galaxy evolution with increasing infrared luminosity over time.
Abstract
We have determined the luminosity function of 250um-selected galaxies detected in the ~14 sq.deg science demonstration region of the Herschel-ATLAS project out to a redshift of z=0.5. Our findings very clearly show that the luminosity function evolves steadily out to this redshift. By selecting a sub-group of sources within a fixed luminosity interval where incompleteness effects are minimal, we have measured a smooth increase in the comoving 250um luminosity density out to z=0.2 where it is 3.6+1.4-0.9 times higher than the local value.
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