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        BLAST : the far-infrared/radio correlation in distant galaxies

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        0910.1091v2 (PDF, 1Mb)
        Author
        Ivison, R.J.
        Alexander, David M.
        Biggs, Andy D.
        Brandt, W.N.
        Chapin, E.L.
        Coppin, Kristen
        Devlin, Mark J.
        Dickinson, Mark
        Dunlop, James
        Dye, Simon
        Eales, Stephen A.
        Frayer, David T.
        Halpern, Mark
        Hughes, David H.
        Ibar, Edo
        Kovacs, A.
        Marsden, Gaelen
        Moncelsi, L.
        Netterfield, Calvin B.
        Pascale, Enzo
        Patanchon, Guillaume
        Rafferty, D. A.
        Rex, Marie
        Schinnerer, Eva
        Scott, Douglas
        Semisch, C.
        Smail, Ian
        Swinbank, A. M.
        Truch, Matthew D.P.
        Tucker, Gregory S.
        Viero, M.P.
        Walter, Fabian
        Weiss, Axel
        Wiebe, Donald V.
        Xue, Y.Q.
        Attention
        2299/11302
        Abstract
        We investigate the correlation between far-infrared (FIR) and radio luminosities in distant galaxies, a lynchpin of modern astronomy. We use data from the Balloon-borne Large Aperture Submillimetre Telescope (BLAST), Spitzer, the Large Apex BOlometer CamerA (LABOCA), the Very Large Array (VLA) and the Giant Metre-wave Radio Telescope (GMRT) in the Extended Chandra Deep Field South (ECDFS). For a catalogue of BLAST 250-micron-selected galaxies, we re-measure the 70--870-micron flux densities at the positions of their most likely 24-micron counterparts, which have a median [interquartile] redshift of 0.74 [0.25, 1.57]. From these, we determine the monochromatic flux density ratio, q_250 = log_10 (S_250micron / S_1400MHz), and the bolometric equivalent, q_IR. At z ~= 0.6, where our 250-micron filter probes rest-frame 160-micron emission, we find no evolution relative to q_160 for local galaxies. We also stack the FIR and submm images at the positions of 24-micron- and radio-selected galaxies. The difference between q_IR seen for 250-micron- and radio-selected galaxies suggests star formation provides most of the IR luminosity in ~
        Publication date
        2010
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1111/j.1365-2966.2009.15918.x
        Other links
        http://hdl.handle.net/2299/11302
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