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        The Suzaku view of the disk-jet connection in the low-excitation radio galaxy NGC 6251

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        906058.pdf (PDF, 527Kb)
        Author
        Evans, D.A.
        Kraft, R.P.
        Lee, J.C.
        Summers, A.C.
        Hardcastle, M.J.
        Gandhi, P.
        Croston, J.H.
        Attention
        2299/8165
        Abstract
        We present results from an 87 ks Suzaku observation of the canonical low-excitation radio galaxy (LERG) NGC6251. We have previously suggested that LERGs violate conventional active galactic nucleus unification schemes: they may lack an obscuring torus and are likely to accrete in a radiatively inefficient manner, with almost all of the energy released by the accretion process being channeled into powerful jets. We model the 0.5-20keV Suzaku spectrum with a single power law of photon index Γ = 1.82, together with two collisionally ionized plasma models whose parameters are consistent with the known galaxy- and group-scale thermal emission. Our observations confirm that there are no signatures of obscured, accretion-related X-ray emission in NGC 6251, and we show that the luminosity of any such component must be substantially sub-Eddington in nature.
        Publication date
        2011-11
        Published in
        Astrophysical Journal Letters
        Published version
        https://doi.org/10.1088/2041-8205/741/1/L4
        Other links
        http://hdl.handle.net/2299/8165
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