Dust heating in the cores of 3CRR radio galaxies
  We have undertaken a Spitzer campaign to measure the IR structures and
spectra of low-redshift 3CRR radio galaxies. The results show that the 3.6 -
160 micron infrared properties vary systematically with integrated source
power, and so demonstrate that contemporary core activity is characteristic of
the behaviour of sources over their lifetimes. IR synchrotron emission is seen
from jets and hotspots in some cases. Thermal emission is found from a jet/gas
interaction in NGC 7385. Most of the near-IR integrated colours of the
low-redshift 3CRR radio galaxies are similar to those of passive galaxies, so
that IR colours are poor indicators of radio activity.
