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Thermal Instability and Alfvén Waves in the Formation of Quasar Clouds

Published online by Cambridge University Press:  12 April 2016

D.R. Gonçalves ,
V. Jatenco-Pereira  and
R. Opher
D.R. Gonçalves
Affiliation:
Institute Astronômico e Geofísico, Universidade de São Paulo Av. Miguel Stéfano 4200, 04301-904 São Paulo – SP, Brazil
V. Jatenco-Pereira
Affiliation:
Institute Astronômico e Geofísico, Universidade de São Paulo Av. Miguel Stéfano 4200, 04301-904 São Paulo – SP, Brazil
R. Opher
Affiliation:
Institute Astronômico e Geofísico, Universidade de São Paulo Av. Miguel Stéfano 4200, 04301-904 São Paulo – SP, Brazil

Abstract

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We use thermal instability as a condensation mechanism to form the characteristic clouds of the BLR of quasars. We include in the total heat-loss function the influence of the heating caused by the damping of Alfvén waves. We study the damping mechanisms: nonlinear, resonance surface, and turbulent. From this analysis, we show that this heating mechanism plays an important role in the formation of these clouds.

Type
IV. Physics of the Broad-Line Region
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 213 - 214
Copyright
Copyright © Astronomical Society of the Pacific 1997

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