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Paper: The Luminous X-ray Hotspot In 4C 74.26: Jet Dynamics At Work
Volume: 386, Extragalactic Jets: Theory and Observation from Radio to Gamma Ray
Page: 56
Authors: Erlund, M.C.; Fabian, A.C.; Blundell, K.; Moss, C.; Ballantyne, D.R.
Abstract: The X-ray counterpart (which we confirm as an X-ray hotspot) to the southern radio hotspot of the largest-known radio quasar 4C 74.26 (z = 0.104) is offset by 10 arcsec (19 kpc) from the radio hotspot complex. The peak of the X-ray emission may be due to synchrotron or inverse-Compton emission. If it is synchrotron emission then the hotspot must be the site of particle acceleration. The offset can be produced by either the jet exhibiting Scheuer’s ‘dentist’s drill’ effect or, less likely, by a fast but low-momentum spine surrounded by a slower, higher-momentum sheath. If the emission arises from the inverse-Compton process, it must be inverse-Compton scattering of the CMB in a decelerating relativistic flow, implying that the jet is relativistic (Γ ≥ 2) out to a distance of at least 800 kpc.
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