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Inconsistency of Photoionization Models for NGC 5548: Proof of Mechanical Heating?

Published online by Cambridge University Press:  12 April 2016

S. Collin-Souffrin ,
A.-M. Dumont  and
L. Nazarova
S. Collin-Souffrin
Affiliation:
DAEC, Observatoire de Paris, Section de Meudon, 92195 Meudon, France
A.-M. Dumont
Affiliation:
DAEC, Observatoire de Paris, Section de Meudon, 92195 Meudon, France
L. Nazarova
Affiliation:
Department of Physics & Astronomy, University of Leicester, Leicester LE1 7RH, UK

Abstract

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It is shown that, in the case of NGC 5548, photoionization models cannot account for line fluxes, line ratios, and line variations. The assumption that a fraction of the broad-line region is mechanically heated can solve the problem.

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. 217 - 219
Copyright
Copyright © Astronomical Society of the Pacific 1997

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