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

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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 D. Frayer J. Fritz Jonathan P. Gardner H.L. Gomez J. Gonzalez-Nuevo D. Herranz D. Hill A. Hopkins E. Ibar R.J. Ivison M.J. Jarvis D.H. Jones L. Kelvin G. Lagache L. Leeuw J. Liske M. Lopez-Caniego J. Loveday S. Maddox M.J. Micha{\l}owski M. Negrello P. Norberg M.J. Page H. Parkinson E. Pascale J.A. Peacock M. Pohlen C. Popescu M. Prescott D. Rigopoulou A. Robotham E. Rigby G. Rodighiero S. Samui D. Scott S. Serjeant R. Sharp B. Sibthorpe P. Temi M.A. Thompson R. Tuffs I. Valtchanov P.P. van der Werf E. van Kampen A. Verma

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keywords luminosityfunctionherschel-atlasredshiftclearlycomovingdemonstrationdensity

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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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The Herschel-ATLAS: Evolution of the 250um luminosity function out to z=0.5

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