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

Copy

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
Identification Number	10.1088/2041-8205/741/1/L4
Additional information	‘In these times, during the rise in the popularity of institutional repositories, the Society does not forbid authors from depositing their work in such repositories. However, the AAS regards the deposit of scholarly work in such repositories to be a decision of the individual scholar, as long as the individual's actions respect the diligence of the journals and their reviewers.’ Original article can be found at : http://iopscience.iop.org/ Copyright American Astronomical Society
Keywords	galaxies: active, galaxies: jets, galaxies: individual (ngc6251), x-rays: galaxies
Date Deposited	15 May 2025 12:17
Last Modified	08 Apr 2026 20:06