Degeneracies of the radial mass profile in lens models
Wucknitz, Olaf · Refsdal, Sjur
Original · EN
We discuss a simple parameter degeneracy in lens models which follows directly from the well known mass sheet degeneracy and prevents determining the radial mass distribution from lensing alone for many systems. For cosmological important systems like 1115+080 it is shown that no exact value of H0 can be determined without assuming a mass index beta.
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