An X-ray survey of the 2Jy sample. II: X-ray emission from extended
  structures
  The 2Jy sample is a survey of radio galaxies with flux densities above 2 Jy
at 2.7 GHz. As part of our ongoing work on the southern subset of 2Jy sources,
in paper I of this series we analysed the X-ray cores of the complete 2Jy
sample with redshifts 0.05<z<0.7. For this work we focus on the X-ray emission
associated with the extended structures (jets, lobes, and environments) of the
complete subset of 2Jy sources with 0.05<z<0.2, that we have observed with
Chandra. We find that hotspots and jet knots are ubiquitous in FRII sources,
which also inhabit systematically poorer environments than the FRI sources in
our sample. Spectral fits of the hotspots with good X-ray statistics invariably
show properties consistent with synchrotron emission, and we show that
inverse-Compton mechanisms under-predict the X-ray emission we observe by 1-2
orders of magnitude. Inverse-Compton emission is detected from many of the
lobes in our sample, and we find that the lobes of the FRII sources show
magnetic fields lower by up to an order of magnitude than expected from
equipartition extrapolations. This is consistent with previous results, which
show that most FRII sources have electron energy densities higher than minimum
energy requirements.
