Evolutionary Connection of Seyfert Galaxies and Quasars

  • Daniel W. Weedman
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


Various recent data are summarized to yield a local luminosity function for Seyfert 1 galaxies. This luminosity function is evolved in different ways to find fits to other observations of faint, high redshift quasars. It is found that a simple form of pure luminosity evolution, exponential in look-back time, is consistent with all existing data. Extrapolations to redshift 4 and magnitude 26 are given for future tests. It is pointed out that such tests from ground or space must continue to rely on the unresolved quasar. An angular diameter-redshift diagram implies that there is no realistic possibility of detecting galactic envelopes of quasars at high redshift.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Balzano, V.A. 1983, Ap.J., 268, 602.ADSCrossRefGoogle Scholar
  2. Braccesi, A. 1983, IAU Symp. 104, Early Evolution of the Universe and its Present Structure, eds: G.O. Abell and G. Chincarini, (Dordrecht: Reidel) p. 23.Google Scholar
  3. Cavaliere, A., Giallongo, E., Messina, A. and Vagnetti, F. 1933, Ap.J., 269, 57.ADSCrossRefGoogle Scholar
  4. Coleman, G.D., Wu, C.-C., and Weedman, D.W. 1980, Ap.J. Suppl., 43, 393.ADSCrossRefGoogle Scholar
  5. Fu-zhen, C., Danese, L., De Zotti, G., and Franceschini, A. 1985, M.N.R.A.S., 212, in press.Google Scholar
  6. Hubble, E., and Tolman, R. 1935, Ap.J., 82, 302.ADSCrossRefzbMATHGoogle Scholar
  7. Keel, W. 1983, Ap.J. Suppl., 52, 229.ADSCrossRefGoogle Scholar
  8. Koo, D. C. and Kron, R. G. 1932, Astr. Ap., 105, 107.ADSGoogle Scholar
  9. Kriss, G. A., and Canizares, C.R. 1982, Ap.J., 261, 51.ADSCrossRefGoogle Scholar
  10. Lawrence A., and Elvis, M. 1985, in Astrophysics of Active Galaxies and Quasi-Stellar Objects, proceedings 1984 Santa Cruz conference, in press.Google Scholar
  11. Maccacaro, T., Gioia, T.M. and Stocke, J. 1984, Ap.J., 283, 486.ADSCrossRefGoogle Scholar
  12. Malkan, M.A., Margon, B., and Chanan, G.A. 1984, Ap.J., 280, 66.ADSCrossRefGoogle Scholar
  13. Marshall, H.L., Tananbaum, H., Zamorani, G., Huchra, J.P., Braccesi, A., and Zitelli, V. 1983, Ap.J., 269, 42.ADSCrossRefGoogle Scholar
  14. Marshall, H.L., Avni, Y., Braccesi, A., Huchra, J.P., Tananbaum, N. Zamorani, G., and Zitelli, V. 1984, Ap.J., 283, 50.ADSCrossRefGoogle Scholar
  15. Meurs, E.J.A., and Wilson, A. S. 1984, Astr. Ap., in press.Google Scholar
  16. Schmidt, M., and Green, R.F. 1983, Ap.J., 269, 352.ADSCrossRefGoogle Scholar
  17. Schneider, D., Schmidt, M., and Gunn, J. 1983, B.A.A.S., 15, 957.ADSGoogle Scholar
  18. Weedman, D.W. 1985a, in Astrophysics of Active Galaxies and Quasi-Stellar Objects, proceedings 1984 Santa Cruz conference, in press.Google Scholar
  19. Weedman, D.W. 1985b, Ap.J. Suppl., 57, in press.Google Scholar
  20. Weedman, D.W., and Huenemoerder, D.H. 1985, Ap.J., 291, in press.Google Scholar
  21. Wu, C.-C., Boggess, A., and Gull, T.R. 1983, Ap.J., 266, 28.ADSCrossRefGoogle Scholar
  22. Yee, H.K.C. 1980, Ap.J., 241, 894.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • Daniel W. Weedman
    • 1
  1. 1.Department of AstronomyThe Pennsylvania State UniversityUniversity ParkUSA

Personalised recommendations