On the origin of the CDDR violation

Mar 18, 2016
6 pages
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Abstract: (arXiv)
The investigation of any violation in the Cosmic Distance Duality Relation (CDDR) is one of the most important sources of investigation for a new physic. In this paper we propose a new method to find the origin of a possible violation on the CDDR. Such violation is defined from the equation dLdA(1+z)2=η\frac{d_L}{d_A(1+z)^2} = \eta, with η1\eta \neq 1. We analyze the observational constraints from SNIa, BAO and fgasf_{gas} for the parameter η\eta using three different parameterizations. We create three data sets with the following combinations: (Set I) dLd_L data from SNIa and dAd_A data from BAO measurements, (Set II) dLd_L data from fgasf_{gas} and dAd_A from BAO measurements and (Set III) dLd_L from SNIa and dAd_A from fgasf_{gas} measurements. The sets have 18 points and a redshift difference between the observational pairs of Δz0.08\Delta z \leq 0.08. It is found that the difference between Sets I and II is up to five times higher than Sets I and III, what suggest that a violation in the CDDR come from a new physics related with the angular diameter distance.
Note:
  • 6 pages, 3 figures This paper has been withdrawn by the author in order to remake it with more recent data and better theoretical analyses
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