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Fig. 4
Upperlimits on LC and the maximum sustainable Poynting flux from the EHM for M87 as a function of Ec for two cases, Lx is entirely from accretion or Lx from accretion is attenuated by an absorbing screen, NH. The maximum sustainable magnetic field in the EHM assuming that a∕M = 0.9 is also plotted.
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