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11.17. Radio emission from low-luminosity active galactic nuclei

Published online by Cambridge University Press:  25 May 2016

Schuyler D. Van Dyk  and
Luis C. Ho
Schuyler D. Van Dyk
Affiliation:
Dept. of Physics & Astronomy, UCLA, Los Angeles, CA 90095-1562 USA
Luis C. Ho
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 USA

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“Low-luminosity” active galactic nuclei (LLAGNs) typically have ≳ mag, as opposed to −18 to −30 mag for luminous Seyfert 1 nuclei and QSOs. The physical origin of the class of emission-line nuclei known as low-ionization nuclear emission-line regions (LINERs; Heckman 1980) remains controversial. Based on the close resemblance of some LINERs to Seyfert nuclei, LINERs can arguably be considered another manifestation of the AGN phenomenon. An alternative view is that stellar processes account for LINER energy. The energetics alone do not provide a useful discrimator between the two possible mechanisms.

Type
Part III. Black Holes and Central Activity
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 489 - 490
Copyright
Copyright © Kluwer 1998 

References

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