6. SUMMARY

• Radio galaxies are multi-component X-ray emitters.

• Jet-related emission dominates the soft X-radiation from the cores of low-power radio galaxies, and may also be important in high-power sources.

• X-ray emission probes the magnetic field strength in compact hot spots (via the synchrotron self-Compton process) and extended regions (via inverse Compton scattering of CMB photons).

• An extended X-ray medium is expected to take a relatively long time to respond to the influence of a radio jet.

• FRI radio sources reside in galaxy/group/cluster hot atmospheres with densities which don't require cluster-scale cooling flows, and pressures which are generally sufficient to confine the radio jets.

• High-redshift FRIIs may all reside in clusters with likely cooling flows.

• More local FRIIs may all be in environments which are rich enough for radio-lobe pressure confinement.

• There are many open issues which the new X-ray observatories will imminently address.

Acknowledgements

I thank Mark Birkinshaw and Martin Hardcastle for their continued collaborations and discussions, and their contributions to this review. I am grateful to the organizers of the workshop for their invitation and partial support, and acknowledge further support from NASA grant NAG5-1882.