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Strong Lensing by Galaxy Clusters and $\Lambda$CDM

Published online by Cambridge University Press:  15 June 2005

Neal Dalal ,
Joseph F. Hennawi ,
Gilbert Holder  and
Paul Bode
Neal Dalal
Affiliation:
Institute for Advanced Study, Einstein Drive, Princeton NJ 08540 USA
Joseph F. Hennawi
Affiliation:
Dept. of Astrophysical Sciences, Princeton University, Ivy Lane, Princeton NJ 08544 USA
Gilbert Holder
Affiliation:
Institute for Advanced Study, Einstein Drive, Princeton NJ 08540 USA
Paul Bode
Affiliation:
Dept. of Astrophysical Sciences, Princeton University, Ivy Lane, Princeton NJ 08544 USA
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Abstract

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We discuss how strong lensing by galaxy clusters may be used to study the properties of dark matter halos and the expansion history of the universe. First, we show how the characteristics of $\Lambda$CDM clusters determine their lensing properties, and show how these properties are manifested in some of the new giant arcs discovered behind SDSS clusters. Next, we compare the statistics of strong lensing by clusters expected in the $\Lambda$CDM model to the observed statistics of giant arcs and wide-separation quasars. Finally, we discuss the cosmographic uses of clusters with multiple arcs, pointing out several sources of noise which can produce $\gtrsim100$ % errors in derived cosmological parameters.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS225 , July 2004 , pp. 193 - 201
Copyright
© 2004 International Astronomical Union