SIMBAD references

2011ApJ...741L...4E - Astrophys. J., 741, L4 (2011/November-1)

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

EVANS D.A., SUMMERS A.C., HARDCASTLE M.J., KRAFT R.P., GANDHI P., CROSTON J.H. and LEE J.C.

Abstract (from CDS):

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 Γ = 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.

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Journal keyword(s): galaxies: active - galaxies: individual: NGC 6251 - galaxies: jets - X-rays: galaxies

Simbad objects: 1

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