Relativistic and Slowing Down: The Flow in the Hotspots of Powerful Radio Galaxies and Quasars

  title={Relativistic and Slowing Down: The Flow in the Hotspots of Powerful Radio Galaxies and Quasars},
  author={Markos GeorganopoulosDemosthenes Kazanas},
  journal={The Astrophysical Journal},
Pairs of radio-emitting jets with lengths up to several hundred kiloparsecs emanate from the central region (the "core") of radio-loud active galaxies. In the most powerful of them, these jets terminate in the "hot spots," compact high-brightness regions, where the jet flow collides with the intergalactic medium (IGM). Although it has long been established that in their inner (~1 pc) regions these jet flows are relativistic, it is still not clear if they remain so at their largest (hundreds of… 

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