{The Suzaku View of the Disk-Jet Connection in the Low-excitation Radio Galaxy NGC 6251}

Citation:

{Evans} D  A, {Summers} A  C, {Hardcastle} M  J, {Kraft} R  P, {Gandhi} P, {Croston} J  H, {Lee} J  C. {The Suzaku View of the Disk-Jet Connection in the Low-excitation Radio Galaxy NGC 6251}. \apjl. 2011;741 :L4.

Abstract:

{We present results from an 87 ks Suzaku observation of the canonical low-excitation radio galaxy (LERG) NGC 6251. 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 0.5-20 keV Suzaku spectrum with a single power law of photon index {$\Gamma$} = 1.82$^{+0.04}$ $_{- 0.05}$, 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. }

Notes:

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