Boundary Layers in Extragalactic Jets

  • David S. de Young
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 175)


The radio morphology of extragalactic radio sources, in particular the FRI objects, has long been recognized to be suggestive of an outflow which is undergoing a strong interaction with the surrounding medium. Two essential elements must be noted in considering this interaction. First, it is inevitable. Second, the interaction will always provide mass and energy transfer from the jet to the ambient medium, and thus it is a loss term in the overall energy balance of the radio source. As will be seen, these losses can be comparable to the overall radio luminosity and hence are a nontrivial constraint on the energy requirements placed on the central engine.


Stagnation Point Radio Source Point Vortex Entrainment Rate Boundary Layer Development 
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Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • David S. de Young
    • 1
  1. 1.Kitt Peak National ObservatoryTucsonUSA

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