2014

Hubble Space Telescope Combined Strong and Weak Lensing Analysis of the CLASH Sample: Mass and Magnification Models and Systematic Uncertainties

Zitrin, Adi, Fabris, Agnese, Merten, Julian et al.

Understand

We present results from a comprehensive lensing analysis in HST data, of the complete CLASH cluster sample.

  • We identify new multiple-images previously undiscovered allowing improved or first constraints on the cluster inner mass distributions and profiles.
  • We combine these strong-lensing constraints with weak-lensing shape measurements within the HST FOV to jointly constrain the mass distributions.
  • The analysis is performed in two different common parameterizations (one adopts light-traces-mass for both galaxies and dark matter while the other adopts an analytical, elliptical NFW form for the dark matter), to provide a better assessment of the underlying systematics - which is most important for deep, cluster-lensing surveys, especially when studying magnified high-redshift objects.

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