Reprocessing of radiation by multi-phase gas in Low Luminosity Accretion   Flows
  We discuss the role that magnetic fields in low luminosity accretion flows can play in creating and maintaining a multi-phase medium, and show that small magnetically-confined clouds or filaments of dense cold gas can dramatically reprocess the `primary' radiation from tori. In particular, radio emission would be suppressed by free-free absorption, and an extra (weak) component would appear at optical wavelengths. This is expected to be a common process in various environments in the central regions of Active Galaxies, such as broad line regions, accretion disk coronae and jets. 
A. Celotti (1,2), M.J. Rees (2) ((1) S.I.S.S.A., Trieste, Italy, (2)   I.o.A., Cambridge, UK)