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        Herschel-ATLAS: Far-infrared properties of radio-loud and radio-quiet quasars

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        Author
        Kalfountzou, E.
        Stevens, J.A.
        Jarvis, M.J.
        Hardcastle, M.J.
        Smith, Daniel
        Bourne, N.
        Dunne, L.
        Ibar, E.
        Eales, S.
        Ivison, R.J.
        Maddox, S.
        Smith, M. W. L.
        Valiante, E.
        de Zotti, G.
        Attention
        2299/13955
        Abstract
        We have constructed a sample of radio-loud and radio-quiet quasars from the Faint Images Radio Sky at Twenty-one centimetres and the Sloan Digital Sky Survey Data Release 7, over the Herschel-ATLAS Phase 1 area (9h, 12h and 14 h . 5 ). Using a stacking analysis, we find a significant correlation between the far-infrared (FIR) luminosity and 1.4-GHz luminosity for radio-loud quasars. Partial correlation analysis confirms the intrinsic correlation after removing the redshift contribution, while for radio-quiet quasars, no partial correlation is found. Using a single-temperature grey-body model, we find a general trend of lower dust temperatures in case of radio-loud quasars compared to radio-quiet quasars. Also, radio-loud quasars are found to have almost constant mean values of dust mass along redshift and optical luminosity bins. In addition, we find that radio-loud quasars at lower optical luminosities tend to have on average higher FIR and 250-μm luminosity with respect to radio-quiet quasars with the same optical luminosites. Even if we use a two-temperature grey-body model to describe the FIR data, the FIR luminosity excess remains at lower optical luminosities. These results suggest that powerful radio jets are associated with star formation especially at lower accretion rates
        Publication date
        2014-08-01
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1093/mnras/stu782
        Other links
        http://hdl.handle.net/2299/13955
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