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astro-ph.CO2026
From Nonparametric Distance Reconstruction to Testing the Etherington Relation and Cosmic Curvature Using 2D and 3D BAO Measurements
Darshan Kumar, Jie Zheng, Zhi-Qiang You +1
We present a joint test of cosmic curvature, , and the cosmic distance-duality relation (CDDR) using the Etherington relation, which connects the luminosity and angular dia…
astro-ph.CO2025
A cosmographic analysis using DESI-DR2 and strong lensing: I. Time-Delay measurements
Darshan Kumar, Deepak Jain, Shobhit Mahajan
Strong gravitational lensing time-delay measurements, together with the distance sum rule (DSR), offer a model-independent approach to probe the geometry and expansion of the unive…
astro-ph.CO2025
The impact of 2D and 3D BAO measurements on the Cosmic Distance Duality Relation with HII galaxies
Jie Zheng, Da-Chun Qiang, Zhi-Qiang You +1
The cosmic distance duality relation (CDDR) is a fundamental and practical condition in observational cosmology that connects the luminosity distance and angular diameter distance.…