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Anisotropic inverse Compton emission in the radio galaxy 3C 265

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arxiv astro-ph/0409358 v1 pith:WV3CJ7DA submitted 2004-09-15 astro-ph

Anisotropic inverse Compton emission in the radio galaxy 3C 265

classification astro-ph
keywords emissionradiocomptonx-rayinverseanisotropicfieldgalaxy
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the results from a Chandra observation of the powerful radio galaxy 3C 265. We detect X-ray emission from the nucleus, the radio hotspots and lobes. In particular, the lobe X-ray emission is well explained as anisotropic inverse Compton scattering of the nuclear photons by the relativistic electrons in the radio lobes; the comparison between radio synchrotron and IC emission yields a magnetic field strength a factor about 2 lower than that calculated under minimum energy conditions. The X-ray spectrum of the nucleus is consistent with that of a powerful, strongly absorbed quasar and the X-ray emission of the south-eastern hotspot can be successfully reproduced by a combination of synchro-self Compton and inverse Compton emission assuming a magnetic field slightly lower than equipartition.

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