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

Evans, D.A., Kraft, R.P., Lee, J.C., Summers, A.C., Hardcastle, M.J., Gandhi, P. and Croston, J.H. (2011) The Suzaku view of the disk-jet connection in the low-excitation radio galaxy NGC 6251. Astrophysical Journal Letters, 741 (1): L4. ISSN 2041-8213

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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.

Item Type	Article
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Keywords	galaxies: active, galaxies: jets, galaxies: individual (ngc6251), x-rays: galaxies
Date Deposited	15 May 2025 12:17
Last Modified	30 May 2025 23:48