Particle Heating in Advection-Dominated Accretion Flows

Abstract

I review particle heating by MHD turbulence in collisionless plasmas appropriate to advection-dominated accretion flows. These considerations suggest that the preferential turbulent heating of protons assumed by theoretical models is only achieved for relatively subthermal magnetic fields.

6 pages, uses paspconf.sty, to appear in Proc. of ``The Workshop on High Energy Processes in Accreting Black Holes,'' eds. J. Poutanen & R. Svensson