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Long-Term Variability of Quasi-Stellar Objects, and Their Distribution in the Hubble Diagram

Published online by Cambridge University Press:  04 August 2017

John E. Beckman  and
Mark R. Kidger
John E. Beckman
Affiliation:
Department of Physics, Queen Mary College, Mile End Road, London El 4NS. England
Mark R. Kidger
Affiliation:
Department of Physics, Queen Mary College, Mile End Road, London El 4NS. England

Extract

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A stochastic model for the energy source of QSO's is used to fit the light curves of 43 objects taken from long-period photometry (minimum duration of observations, 8 years per object). The model fits are encouraging enough to allow us to derive absolute luminosities for individual QSO's and to re-plot the Hubble Diagram with the values thus computed. We find a significantly improved fit to the expected unit slope in the plot of log z against 1/5(mB - MB), and a best fit value of qo = 0.1 (±0.4).

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 104: Early Evolution of the Universe and Its Present Structure , 1983 , pp. 41
Copyright
Copyright © Reidel 1983