The Physics of E x B-Drifting Jets
  It is argued that the physical jets consist of monoenergetic pairplasma performing almost lossfree ExB-drift. The observed broad power-law spectra result on collision with obstacles, via post-acceleration by the (huge) convected Poynting flux. 
Wolfgang Kundt (1), Gopal Krishna (2) ((1) IfA of Bonn University, (2)   National Centre for Radio Astrophysics/TIFR, Pune)