Two model-independent methods applied to latest SN and BAO data find the cosmic distance duality relation consistent with observations within 1 sigma and no evidence of violation.
The distance duality relation from X-ray and SZ observations of clusters
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abstract
X-ray and Sunyaev-Zel'dovich data of clusters of galaxies enable to construct a test of the distance duality relation between the angular and luminosity distances. We argue that such a test on large cluster samples may be of importance while trying to distinguish between various models of dark energy. The analysis of a data set of 18 clusters shows no significant violation of this relation. The origin and amplitude of systematic effects and the possibility to increase the precision of this method are discussed.
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Model-independent test of the cosmic distance duality relation with recent observational data
Two model-independent methods applied to latest SN and BAO data find the cosmic distance duality relation consistent with observations within 1 sigma and no evidence of violation.