Extended inverse-Compton emission from distant, powerful radio galaxies

Abstract

We present Chandra observations of two relatively high redshift FRII radio galaxies, 3C 432 and 3C 191 (z=1.785 and z=1.956 respectively), both of which show extended X-ray emission along the axis of the radio jet or lobe. This X-ray emission is most likely to be due to inverse-Compton scattering of Cosmic Microwave Background (CMB) photons. Under this assumption we estimate the minimum energy contained in the particles responsible. This can be extrapolated to determine a rough estimate of the total energy. We also present new, deep radio observations of 3C 294, which confirm some association between radio and X-ray emission along the NE-SW radio axis and also that radio emission is not detected over the rest of the extent of the diffuse X-ray emission. This, together with the offset between the peaks of the X-ray and radio emissions may indicate that the jet axis in this source is precessing.

definitive version is on MNRAS online early, 9 pages, 6 figures - here misleading text removed and typos corrected

References in corpus (2)

• Discovery of the low-energy cutoff in a powerful giant radio galaxy
• Discovery of an overdensity of faint red galaxies in the vicinity of the z=1.786 radio galaxy 3C 294

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