Dragan Huterer and Chung-Pei Ma 2004 ApJ 600 L7 doi:10.1086/381690
Constraints on the Inner Cluster Mass Profile and the Power Spectrum Normalization from Strong Lensing Statistics
FREEDragan Huterer1 and Chung-Pei Ma2
Show affiliationsStrong gravitational lensing is a useful probe of both the intrinsic properties of the lenses and the cosmological parameters of the universe. The large number of model parameters and small sample of observed lens systems, however, have made it difficult to obtain useful constraints on more than a few parameters from lensing statistics. Here we examine how the recent Wilkinson Microwave Anisotropy Probe measurements help improve the constraining power of statistics from the Cosmic Lens All-Sky Survey (CLASS). We find that the absence of θ > 3'' lenses in CLASS places an upper bound of β < 1.25 (1.60) at a 68% (95%) confidence level (CL) on the inner density profile, ρ 
r-β, of cluster-sized halos. Furthermore, the favored power spectrum normalization is σ8 
0.7 (95% CL). We discuss two possibilities for stronger future constraints: a positive detection of at least one large-separation system and next-generation radio surveys such as the proposed Low-Frequency Array.
- Subject headings
- Dates
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Issue 1 (2004 January 1)
Received 2003 July 17, accepted for publication 2003 November 25
Published 2003 December 17
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Constraints on the Inner Cluster Mass Profile and the Power Spectrum Normalization from Strong Lensing Statistics
Dragan Huterer and Chung-Pei Ma 2004 ApJ 600 L7
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