Strong lensing systems and galaxy cluster observations as probe to the cosmic distance duality relation

In this paper, we use large scale structure observations to test the redshift dependence of cosmic distance duality relation (CDDR), D-L(1+z)(-2)/D-A = eta(z), with DL and DA, being the luminosity and angular diameter distances, respectively. In order to perform the test, the following data set are considered: strong lensing systems and galaxy cluster measurements (gas mass fractions). No specific cosmological model is adopted, only a flat universe is assumed. By considering two n(z) parametrizations, It is observed that the CDDR remain redshift independent within 1.5 sigma which is in full agreement with other recent tests involving cosmological data. It is worth to comment that our results are independent of the baryon budget of galaxy clusters.

Automated summary

In this paper, the redshift dependence of cosmic distance duality relation is tested using large scale structure observations. The results show that this relation remains redshift independent to a certain extent.