A test of cosmic distance duality relation using SPT-SZ galaxy clusters, Type Ia supernovae, and cosmic chronometers

Bora, Kamal and Desai, S. (2021) A test of cosmic distance duality relation using SPT-SZ galaxy clusters, Type Ia supernovae, and cosmic chronometers. Journal of Cosmology and Astroparticle Physics, 2021 (06). 052. ISSN 1475-7516

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Abstract

We carry out a test of the cosmic distance duality relation using a sample of 52 SPT-SZ clusters, along with X-ray measurements from XMM-Newton. To carry out this test, we need an estimate of the luminosity distance (DL) at the redshift of the cluster. For this purpose, we use three independent methods: directly using DL from the closest Type Ia Supernovae from the Union 2.1 sample, non-parametric reconstruction of DL using the same Union 2.1 sample, and finally using H(z) measurements from cosmic chronometers and reconstructing DL using Gaussian Process regression. We use four different functions to characterize the deviations from CDDR. All our results for these (4 × 3) analyses are consistent with CDDR to within 1σ.

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