Extended inverse-Compton emission from distant, powerful radio galaxies |
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Authors: | M C Erlund A C Fabian Katherine M Blundell A Celotti C S Crawford |
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Institution: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;University of Oxford, Astrophysics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH;SISSA/ISAS, via Beirut 4, 34014 Trieste, Italy |
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Abstract: | We present Chandra observations of two relatively high redshift FR II radio galaxies, 3C 432 and 3C 191 ( z = 1.785 and 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 north-east–south-west 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. |
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Keywords: | galaxies: jets X-rays: individual: 3C 191 X-rays: individual: 3C 294 X-rays: individual: 3C 432 |
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