• DOI:10.1093/mnras/stt352
• Corpus ID: 18337023

The SCUBA-2 Cosmology Legacy Survey: blank-field number counts of 450-μm-selected galaxies and their contribution to the cosmic infrared background

@article{Geach2012TheSC,
  title={The SCUBA-2 Cosmology Legacy Survey: blank-field number counts of 450-$\mu$m-selected galaxies and their contribution to the cosmic infrared background},
  author={James E. Geach and Edward L. Chapin and K. E. K. Coppin and James S. Dunlop and Mark Halpern and Ian R. Smail and Paul van der Werf and Stephen Serjeant and Duncan Farrah and Isaac Roseboom and Thomas A. Targett and Vinodiran Arumugam and Viktoria Asboth and Andrew W. Blain and Antonio Chrysostomou and Charlotte Clarke and R. J. Ivison and S. L. Jones and Alexander Karim and Todd Mackenzie and Rowin Meijerink and Michał Jerzy Michałowski and Douglas Scott and James M. Simpson and A Mark Swinbank and David M. Alexander and Omar Almaini and Itziar Aretxaga and Philip N. Best and Scott C. Chapman and David L. Clements and Christopher J. Conselice and A. L. R. Danielson and Stephen A. Eales and Alastair C. Edge and Andrew G. Gibb and Deborah Hughes and Tim Jenness and Kirsten K. Knudsen and Cedric G Lacey and Galen Marsden and Richard G. McMahon and S. J. Oliver and M J Page and John A Peacock and Dimitra Rigopoulou and E. Ian Robson and Marco Spaans and Jason A. Stevens and Tracy M. A. Webb and Chris J. Willott and C. D. Wilson and Michael Zemcov},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2012},
  volume={432},
  pages={53-61}
}

• J. Geach, E. Chapin, +50 authors M. Zemcov
• Published 28 November 2012
• Physics
• Monthly Notices of the Royal Astronomical Society

The first deep blank-field 450 mu m map (1 sigma approximate to 1.3 mJy) from the Submillimetre Common-User Bolometer Array-2 SCUBA-2 Cosmology Legacy Survey (S2CLS), conducted with the James Clerk Maxwell Telescope (JCMT) is presented. Our map covers 140 arcmin(2) of the Cosmological Evolution Survey field, in the footprint of the Hubble Space Telescope (HST) Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey. Using 60 submillimetre galaxies detected at >= 3.75s, we evaluate the number counts of 450-mu m-selected galaxies with flux densities S-450 > 5 mJy. The 8 arcsec JCMT beam and high sensitivity of SCUBA-2 now make it possible to directly resolve a larger fraction of the cosmic infrared background (CIB, peaking at. similar to 200 mu m) into the individual galaxies responsible for its emission than has previously been possible at this wavelength. At S450 > 5 mJy, we resolve (7.4 +/- 0.7) x 10(-2) MJy sr(-1) of the CIB at 450 mu m (equivalent to 16 +/- 7 per cent of the absolute brightness measured by the Cosmic Background Explorer at this wavelength) into point sources. A further similar to 40 per cent of the CIB can be recovered through a statistical stack of 24 mu m emitters in this field, indicating that the majority (approximate to 60 per cent) of the CIB at 450 mu m is emitted by galaxies with S450 > 2 mJy. The average redshift of 450 mu m emitters identified with an optical/near-infrared counterpart is estimated to be = 1.3, implying that the galaxies in the sample are in the ultraluminous class (LIR approximate to 1.1 x 1012 L approximate to). If the galaxies contributing to the statistical stack lie at similar redshifts, then the majority of the CIB at 450 mu m is emitted by galaxies in the luminous infrared galaxy (LIRG) class with LIR > 3.6 x 1011 L-circle dot.