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Planetary Nebulae and Seyfert Galaxies - Similarities and Differences

Published online by Cambridge University Press:  18 September 2017

Donald E. Osterbrock
Donald E. Osterbrock*
Affiliation:
Lick Observatory, Board of Studies in Astronomy and Astrophysics, University of California, Santa Cruz

Abstract

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Knowledge gained in the study of planetary nebulae has been, and can be further, transferred to understanding active galactic nuclei. Photoionization is the main energy-input mechanism in the narrow-line regions, and probably although by no means certainly in the broad-line regions as well. There are many detailed differences because of the much “harder” input spectrum in active galactic nuclei, compared with planetary nebulae. A tentative model of the structure of the gas distribution in a Seyfert-galaxy nucleus is presented.

Type
Section VI: Planetary Nebulae in a Galactic and Extragalactic Context
Information
Symposium - International Astronomical Union , Volume 103: Planetary Nebulae , 1983 , pp. 473 - 486
Copyright
Copyright © Reidel 1983 

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