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Evolutionary Continuity of the Optical AGNs

  • A. Cavaliere
  • E. Giallongo
  • F. Vagnetti
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)

Abstract

With the optical data base now rapidly expanding, it is time to begin bridging the gap between astrophysical issues and phenomenological descriptions concerning the evolutionary properties of the AGNs. Ne review problems, achievements and perspectives of such ‘intermediate’ models that are parameterized in terms of quantities of direct astrophysical meaning. Specific issues here discussed are: the continuity between Seyfert 1 nuclei and QSOs; a first parameterization of the interactions as triggers of activity; the rise of the QSOs; the evolutionary peculiarity of BL Lac Objects.

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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • A. Cavaliere
    • 1
  • E. Giallongo
    • 2
  • F. Vagnetti
    • 3
  1. 1.Astrofisica, Dip. FisicaII Universita’ di RomaItaly
  2. 2.Ist. AstronomiaUniversita’ di PadovaItaly
  3. 3.Ist. AstronomicoI Universita’ di RomaItaly

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