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Star Formation in Galactic Nuclei

Published online by Cambridge University Press:  12 April 2016

Roberto Terlevich
Roberto Terlevich*
Affiliation:
Royal Greenwich Observatory, Herstmonceux, BN27 1RP, U.K.

Summary.

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The term AGN or Active Galactic Nucleus, although with rather ill-defined boundaries, signifies extragalactic systems with non-stellar nuclear activity. Non-stellar activity indicators are: high luminosity, presence of broad emission lines, variability, nuclear UV excess, x-ray emission, radio emission, variable polarization, jets, etc.

Type
V. The Extragalactic ISM
Information
International Astronomical Union Colloquium , Volume 120: Structure and Dynamics of the Interstellar Medium , 1989 , pp. 342 - 352
Copyright
Copyright © Springer-Verlag 1989

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