Determining cosmological parameters through statistics of redshifts of lens galaxies

Phillip King (as I was known before my first marriage)

in Gravitational Lenses in the Universe: Proceedings of the 31st Liège International Astrophysical Colloquium (ADS: 1993LIACo..31.....S)
J. Surdej, D. Fraipont-Caro, E. Gosset, S. Refsdal & M. Remy (eds.)
Liège: Université de Liège, pp. 33–39 (1993)

For known gravitational lens systems the redshift distribution of the lenses is compared with theoretical expectations for about ten thousand Friedmann-Lemaître cosmological models, which more than cover the range of possible cases. The comparison is used for assigning a relative probability to each of the models. The entire procedure is repeated for different values of the inhomogeneity parameter eta as well as H_0 and the limiting spectroscopic magnitude, which are important for selection effects. The dependence on these three parameters is examined in more detail for lambda=0 and k=0.

The previous result of other authors that this method is a good probe for lambda_0 is confirmed, but it appears that the low probability of models with large lambda_0 values reported by these authors may be due to a selection effect. The power of this method to discriminate between cosmological models can be improved dramatically if more gravitational lens systems are found.

info and local links to full paper | ADS: 1993LIACo..31...33K | Google Scholar
Note: Since this was written before my first marriage, it appeared under my birth name "King".
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