The Luminosity Function of Quasars and Low Luminosity Active Galactic Nuclei

  • Herman L. Marshall
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


The quasar luminosity function is extended to include the nuclear luminosities of Seyfert 1 galaxies. The model is fitted to the (total) luminosity data for the active galaxies from a complete flux-limited survey. A good fit is obtained with dN/dL∝L-1.2, matching onto the steeper quasar luminosity function near MB=-22. The feature thus produced conforms to the luminosity functions of Koo and Kron using a pure luminosity evolution model derived from brighter quasar data.


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  1. Boyle, B.J., Shanks, T., Fong, R. and Clowes, R.G. 1985, M.N.R.A.S., submitted.Google Scholar
  2. Braccesi, A., Zitelli, V., Bonoli, F., and Formiggini, L. 1980, Astr. Ap., 85, 80.ADSGoogle Scholar
  3. Cheng, F., Danese, L. de Zotti, G., and Franceschini, A. 1985, M.N.R.A.S., 212, 857.ADSGoogle Scholar
  4. Davis, M. and Huchra, J. 1982, Ap. J., 254, 449.ADSCrossRefGoogle Scholar
  5. Fillipenko, A. V. and Sargent, W. L. W. 1985, Ap. J. Suppl., 57, 503.ADSCrossRefGoogle Scholar
  6. Huchra, J. P., 1985, in preparation.Google Scholar
  7. Huchra, J. P., Davis, M., Latham, D., and Tonry, J. 1983, Ap. J. Suppl., 52, 89.ADSCrossRefGoogle Scholar
  8. Koo, D. C. and Kron, R. G. 1985 in preparation.Google Scholar
  9. Marshall, H. L., Tananbaum, H., Zamorani, G., Huchra, J. P., Braccesi, A., and Zitelli, V. 1983, Ap. J., 269, 42.ADSCrossRefGoogle Scholar
  10. Marshall, H. L., Avni, Y., Braccesi, A., Huchra, J. P., Tananbaum, H., Zamorani, G., and Zitelli, V. 1984, Ap. J., 283, 50.ADSCrossRefGoogle Scholar
  11. Marshall, H. L., 1985a, Ap. J., submitted.Google Scholar
  12. Marshall, H. L. 1985b, in preparation.Google Scholar
  13. Mitchell, K. S., Warnock, A. III, and Usher, P. D. 1984, Ap. J. (Letters), 287, L3.ADSCrossRefGoogle Scholar
  14. Schmidt, M. and Green, R. F. 1983, Ap. J., 269, 357.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • Herman L. Marshall
    • 1
  1. 1.Space Telescope Science InstituteBaltimoreUSA

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