The Nature of Compact Radio Cores in Galaxies

Heino Falcke

to appear in: ``The Center of the Galaxy and Galaxies'', IAU Symp. 184, Kyoto 1997, Y.~Sofue (ed.), Kluwer, 2 pages (invited contribution)

Abstract:

Compact radio cores, which are often assumed to mark the presence of a super-massive black hole, are not only found in the nuclei of powerful quasars but also in nearby galaxies. While in quasars they are typically associated with relativistic jets, the nature of those cores in low-luminosity AGN is less clear. Here, I will briefly mention some of the recent theories (ADAFs or jets) and observations of the latter class of objects.

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