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Galaxy And Mass Assembly (GAMA) : the 0.013 < z < 0.1 cosmic spectral energy distribution from 0.1 μm to 1 mm

Driver, S.P. and Robotham, A.S.G. and Kelvin, L. and Alpaslan, M. and Baldry, I.K. and Bamford, S.P. and Brough, S. and Brown, M. and Hopkins, A.M. and Liske, J. and Loveday, J. and Norberg, P. and Peacock, J.A. and Andrae, E. and Bland-Hawthorn, J. and Bourne, N. and Cameron, E. and Colless, M. and Conselice, C.J. and Croom, S.M. and Dunne, L. and Frenk, C.S. and Graham, A.W. and Gunawardhana, M. and Hill, D.T. and Jones, D.H. and Kuijken, K. and Madore, B. and Nichol, R.C. and Parkinson, H.R. and Pimbblet, K.A. and Phillipps, S. and Popescu, C.C. and Prescott, M. and Seibert, M. and Sharp, R.G. and Sutherland, W.J. and Taylor, E.N. and Thomas, D. and Tuffs, R.J. and van Kampen, E. and Wijesinghe, D. and Wilkins, S. (2012) 'Galaxy And Mass Assembly (GAMA) : the 0.013 < z < 0.1 cosmic spectral energy distribution from 0.1 μm to 1 mm.', Monthly notices of the Royal Astronomical Society., 427 (4). pp. 3244-3264.


We use the Galaxy And Mass Assembly survey (GAMA) I data set combined with GALEX, Sloan Digital Sky Survey (SDSS) and UKIRT Infrared Deep Sky Survey (UKIDSS) imaging to construct the low-redshift (z < 0.1) galaxy luminosity functions in FUV, NUV, ugriz and YJHK bands from within a single well-constrained volume of 3.4 × 105 (Mpc h−1)3. The derived luminosity distributions are normalized to the SDSS data release 7 (DR7) main survey to reduce the estimated cosmic variance to the 5 per cent level. The data are used to construct the cosmic spectral energy distribution (CSED) from 0.1 to 2.1 μm free from any wavelength-dependent cosmic variance for both the elliptical and non-elliptical populations. The two populations exhibit dramatically different CSEDs as expected for a predominantly old and young population, respectively. Using the Driver et al. prescription for the azimuthally averaged photon escape fraction, the non-ellipticals are corrected for the impact of dust attenuation and the combined CSED constructed. The final results show that the Universe is currently generating (1.8 ± 0.3) × 1035 h W Mpc−3 of which (1.2 ± 0.1) × 1035 h W Mpc−3 is directly released into the inter-galactic medium and (0.6 ± 0.1) × 1035 h W Mpc−3 is reprocessed and reradiated by dust in the far-IR. Using the GAMA data and our dust model we predict the mid- and far-IR emission which agrees remarkably well with available data. We therefore provide a robust description of the pre- and post-dust attenuated energy output of the nearby Universe from 0.1 μm to 0.6 mm. The largest uncertainty in this measurement lies in the mid- and far-IR bands stemming from the dust attenuation correction and its currently poorly constrained dependence on environment, stellar mass and morphology.

Item Type:Article
Keywords:Surveys, Galaxies: fundamental parameters, Galaxies: general, Galaxies: luminosity function, Mass function, Cosmology: observations, Infrared: galaxies.
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Publisher statement:This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2012 The Authors Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.
Record Created:21 Aug 2014 15:20
Last Modified:26 Aug 2014 11:12

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