A radial mass profile analysis of the lensing cluster MS2137-23

Details A radial mass profile analysis of the lensing cluster MS2137-23 A radial mass profile analysis of the lensing cluster MS2137-23

2002-12-09

arxiv.org/abs/astro-ph/0212214v2

Astron.Astrophys. 403 (2003) 11-28

Astronomy and Astrophysics

Astrophysics

Final version accepted in A&A

Scientific paper

10.1051/0004-6361:20030306

We reanalyze the strong lens modeling of the cluster of galaxies MS2137-23 using a new data set obtained with the ESO VLT. We found the photometric redshifts of the two main arc systems are both at z=1.6. After subtraction of the central cD star light of the HST image we found that only one object lying underneath has the expected properties of the fifth image associated to the tangential arc. We improve the previous lens modelings of the central dark matter distribution of the cluster, using an isothermal model with a core (IS) and the NFW-like model with a cusp. Without the fifth image, the arc properties together with the shear map profile are equally well fit by the and by an IS and a sub-class of generalized-NFW mass profiles having inner slope power index in the range 0.7

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