The amplitude of the initial density
نویسنده
چکیده
A complete catalogue of galaxy cluster models can be used to constrain cosmological parameters like 8 , the amplitude of the initial density uctuation spectrum. We focus here on two strong lensing statistics for clusters of galaxies: the fraction of rich Abell clusters that are critical to lensing, and the abundance of arcs in such clusters, especially the X-ray luminous ones. The speciic aim of this paper is to constrain 8 for the standard Cold Dark Matter scenario within an Einstein-de Sitter universe.
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