The confinement of powerful extragalactic radio sources

We propose deep observations of the nearest classical double (FRII) radiogalaxies, to search for the medium which provides rampressure confinement forthe radio lobes. This will allow us to eliminate fundamental uncertainties inthe energetics and timescales of the jets and AGN. The EPIC spectra will showwhether the emission is dominated by unshocked or shocked gas (the ratio willdepend on the shock strength). To minimise confusion from AGN emission, ourtargets are narrowline objects with weak nuclear Xray emission. On the wellsupported orientation unified scheme, the lobes in NLRG are close to the skyplane, so projection effects are unimportant. We should also detect inverseCompton from radio lobes, unless field strengths are well above equipartition. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]