Banca de QUALIFICAÇÃO: FELIX SILVA DE LIMA
26/04/2021 14:45
Many new strong gravitational lensing (SGL) systems have been discovered in the last two decadeswith the advent of powerful new space and ground-based telescopes. The effect of the lens mass
model (usually the power-law mass model) on cosmological parameters constraints has been per-formed recently in literature. In this paper, by using SGL systems and Supernovae type Ia observa-tions, we explore if the power-law mass density profile is consistent with the cosmic distance duality
relation (CDDR), DL(1 + z)−2/DA = η(z) = 1, by considering different lens mass intervals. It hasbeen obtained that the verification of the CDDR validity is significantly dependent on lens massinterval considered: the sub-sample with σap ≥ 300 km/s (where σap is the lens apparent stellarvelocity dispersion) is in full agreement with the CDDR validity, the sub-sample with intermediateσap values (200 ≤ σap < 300) km/s is marginally consistent with η = 1 and, finally, the sub-samplewith low σap values (σap < 200 km/s) ruled out the CDDR validity with high statistical confidence.
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