The X-ray nuclei of intermediate-redshift radio sources

  title={The X-ray nuclei of intermediate-redshift radio sources},
  author={Martin J. Hardcastle and D. A. Evans and Judith H. Croston},
  journal={Monthly Notices of the Royal Astronomical Society},
We present a Chandra and XMM-Newtonspectral analysis of the nuclei of the radio galaxies and radio-loud quasars from the 3CRR sample in the redshift range 0.1 < z < 0.5. In the range of radio luminosity sampled by these objects, mostly FRIIs, it has been clear for some time that a population of radio galaxies (‘low-excitation radio galaxies’) cannot easily participate in models that unify narrow-line radio galaxie s and broad-line objects. We show that low-excitation and narrow-line radio… 

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