Observational Cosmology And The Cosmic Distance Duality Relation
Remya Nair, Sanjay Jhingan, Deepak Jain
TL;DR
This paper tests the cosmic distance duality relation using supernovae, galaxy clusters, and radio galaxies, analyzing various parameterizations to verify its validity in observational cosmology.
Contribution
It introduces a comprehensive test of the duality relation with multiple parameterizations and observational data sources, assessing its validity.
Findings
Some parameterizations are significantly ruled out.
The duality relation holds within certain models.
Results support the consistency of distance measures in cosmology.
Abstract
We study the validity of cosmic distance duality relation between angular diameter and luminosity distances. To test this duality relation we use the latest Union2 Supernovae Type Ia (SNe Ia) data for estimating the luminosity distance. The estimation of angular diameter distance comes from the samples of galaxy clusters (real and mock) and FRIIb radio galaxies. We parameterize the distance duality relation as a function of redshift in six different ways. Our results rule out some of the parameterizations significantly.
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