Abstract
The cosmic distance duality relation(DDR),which links the angular-diameter and luminosity distances,is a cornerstone in modern cosmology.Any deviation from DDR may indicate new physics beyond the standard cos-mological model.In this study,we used four high-precision time-delayed strong gravitational lensing(SGL)sys-tems provided by H0LiCOW to test the validity of DDR.To this end,we directly compared the angular-diameter distances from these SGL systems with the luminosity distances from the latest Pantheon+compilation of SNe Ia.To reduce the statistical errors arising from redshift matching,a Gaussian process method was applied to reconstruct the distance-redshift relation from the Pantheon+dataset.We parameterized the possible violation of DDR in three dif-ferent models.All results confirm the validity of DDR at lσ confidence level.Additionally,Monte Carlo simula-tions based on the future LSST survey indicated that the precision of DDR could reach the 10-2 level with 100 SGL systems.
NETL
NSTL
万方数据