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 clouds or filaments of dense cold gas can dramatically reprocess the 'primary' radiation from tori. In particular, radio emission is suppressed by free-free absorption, and an extra tweak) component appears 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 disc coronae and jets.
Reprocessing of radiation by multi-phase gas in low-luminosity accretion flows / Celotti, Anna Lisa; Rees, M. J.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 305:3(1999), pp. L41-L44. [10.1046/j.1365-8711.1999.02574.x]
Reprocessing of radiation by multi-phase gas in low-luminosity accretion flows
Celotti, Anna Lisa;
1999-01-01
Abstract
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 clouds or filaments of dense cold gas can dramatically reprocess the 'primary' radiation from tori. In particular, radio emission is suppressed by free-free absorption, and an extra tweak) component appears 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 disc coronae and jets.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.