The X-ray nuclei of FRII radio galaxies: unification and accretion modes

Details The X-ray nuclei of FRII radio galaxies: unification and accretion modes The X-ray nuclei of FRII radio galaxies: unification and accretion modes

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop...56h&link_type=abstract

XMM-Newton Proposal ID #05517610

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Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, 4C12.03, 3C16, 3C314.1, 3C319, 3C20, 3C274.1, 3C433, 3C171, 3C341, 3C153, Xmm-Newton Proposal Id #05517610

Scientific paper

We have recently shown that a population of powerful radio galaxies, the low-excitation FRII radio galaxies, appears to have no accretion-related nuclear X-ray emission, despite having high-luminosity radio jets: plausibly these objects are accreting via a different, radiatively inefficient accretion mode compared to the better understood narrow-line radio galaxies and quasars. This picture is consistent with other information from the optical and infrared bands, but the crucial X-ray constraints come from a small and inhomogenous sample. We propose observations of a sample of low-excitation and narrow-line radio galaxies which will greatly increase our sample size and allow us to make definitive statements about the nature of the accretion mode in these objects.

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