Model for the X-ray emission in the jets and hot spots of radio galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Radio Galaxies, X-Ray Sources, X-Ray Bursts, Gamma-Ray Sources, Gamma-Ray Bursts, Jets And Bursts, Galactic Winds And Fountains

Scientific paper

We propose a model for the origin of extended X-ray emission in the large-scale jets and hot spots of radio galaxies. If radio galaxies are misaligned blazars, then they are sources of collimated high-energy gamma radiation from the inner jet. Gamma rays with >~100 TeV energies will be attenuated by the microwave background and surrounding radiation fields, causing high-energy electrons and pairs to be injected far from the central engine. The high-energy pairs will produce X-ray synchrotron radiation that could account for the emission detected from sources such as Pictor A and Cygnus A with the Chandra X-ray Observatory. .

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