- 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
- 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.
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.