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Improvement of the Hubble Diagram for QSO’s Leading Towards qo

  • J. E. Beckman
  • M. Kidger
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)

Abstract

Using the predictions of the Lynden Bell/Hills model of the energy source of QSO’s in which discrete packets of matter (e.g. stars) are converted into radiation near a massive black hole we show how the variability observations of QSO’s over long periods may be used to upgrade the Hubble diagram for these objects. In a class of objects of low shot rate (see the article by Kidger and Beckman in these proceedings) extensive simulations using a shot noise model indicate that individual events may be distinguishable. This enables us to calibrate the relation between shot-rate and the variance of apparent luminosity and hence derive shot-rates for objects with measured light curves. From these shot rates absolute luminosities are in principle derivable, and here we indicate the observational difficulties still impeding progress in our path towards reliable values of qo using this method.

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References

  1. Fahlman, G.G., Ulrych, T.J.: 1976, Ap.J. 201, 277ADSCrossRefGoogle Scholar
  2. Fahlman, G.G., Ulrych, T.J.: 1976, Ap.J. 209, 553CrossRefGoogle Scholar
  3. Hills, J.G.: 1975, Nature 254, 295ADSCrossRefGoogle Scholar
  4. Kidger, M.R., Beckman, J.E.: 1986, Three articles in these proceedings.Google Scholar
  5. Tapia, S., Craine, E.R., Johnson, K.: 1976, Ap.J. 203, 291ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • J. E. Beckman
    • 1
  • M. Kidger
    • 1
  1. 1.Instituto de Astrofísica de CanariasUniversidad de La LagunaTenerifeSpain

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