2 papers
astro-ph.CO2025
Flat-sky Angular Power Spectra Revisited
Zucheng Gao, Zvonimir Vlah, Anthony Challinor
We revisit the flat-sky approximation for evaluating the angular power spectra of projected random fields by retaining information about the correlations along the line of sight. W…
astro-ph.CO2024
An Opacity-Free Method of Testing the Cosmic Distance Duality Relation Using Strongly Lensed Gravitational Wave Signals
Shun-Jia Huang, En-Kun Li, Jian-dong Zhang +4
The cosmic distance duality relation (CDDR), expressed as DL(z) = (1 + z)2DA(z), plays an important role in modern cosmology. In this paper, we propose a new method of testing CDDR…