The Suzaku view of the disk-jet connection in the low-excitation radio galaxy NGC 6251
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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
2011-11Published in
Astrophysical Journal LettersPublished version
https://doi.org/10.1088/2041-8205/741/1/L4Other links
http://hdl.handle.net/2299/8165Metadata
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