Probing physical conditions in the extended emission-line regions of powerful radio galaxies: the case of 3C171

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Scientific paper

Extended optical emission-line regions in which cold gas is ionized by the radio jets are common in high-redshift radio AGN. Our target, 3C171, is the best-studied low-redshift analog of those systems: a region of shock-excited, outflowing gas around the jets has been studied with optical and high-frequency radio polarization data. 'Snapshot' Chandra observations have shown that the environment of the radio galaxy, and potentially the medium responsible for the radio depolarization, are detectable in the X-ray. We propose follow-up Chandra observations that will measure the physical conditions in and around the radio source; coupled with our optical and radio data, this will give a complete picture of the dynamics and energetics of the outflow of cold and warm gas in this object.

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