Galaxy And Mass Assembly (GAMA) : the 0.013 < z < 0.1 cosmic spectral energy distribution from 0.1 μm to 1 mm
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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 × 10 (Mpc h). 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) × 10h W Mpc of which (1.2 ± 0.1) × 10h W Mpc is directly released into the inter-galactic medium and (0.6 ± 0.1) × 10h W Mpc 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 0.1μm 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.
Driver , S P , Robotham , A S G , Kelvin , L , Alpaslan , M , Baldry , I K , Bamford , S P , Brough , S , Brown , M , Hopkins , A M , Liske , J , Loveday , J , Norberg , P , Peacock , J A , Andrae , E , Bland-Hawthorn , J , Bourne , N , Cameron , E , Colless , M , Conselice , C J , Croom , S M , Dunne , L , Frenk , C S , Graham , A W , Gunawardhana , M , Hill , D T , Jones , D H , Kuijken , K , Madore , B , Nichol , R C , Parkinson , H R , Pimbblet , K A , Phillipps , S , Popescu , C C , Prescott , M , Seibert , M , Sharp , R G , Sutherland , W J , Taylor , E N , Thomas , D , Tuffs , R J , van Kampen , E , Wijesinghe , D & 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 , vol. 427 , no. 4 , pp. 3244-3264 . DOI: 10.1111/j.1365-2966.2012.22036
Monthly Notices of the Royal Astronomical Society
© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
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