Cosmic shear with one component and its application to future radio surveys
Abstract
We present a new approach to measuring cosmic shear: the one-component kinematic lensing (KL) method. This technique provides a simplified implementation of KL that reduces shape noise in weak lensing (WL) by combining kinematic information with imaging data, while requiring less observational effort than the full two-component KL. We perform simulated likelihood analyses to assess the performance of the one-component KL and demonstrate its applicability to future radio surveys. Our forecasts indicate that, for radio surveys, the one-component KL is not yet competitive with traditional WL due to the shallow redshift distribution of Hi-selected galaxies. However, when applying this method to deeper spectroscopic surveys with stronger emission lines, the one-component KL approach could surpass WL in constraining power, offering a promising and efficient pathway for future shear analyses.
Cite
@article{arxiv.2510.18011,
title = {Cosmic shear with one component and its application to future radio surveys},
author = {Yu-Hsiu Huang and Elisabeth Krause and Tim Eifler and Gary Bernstein and Jiachuan Xu and Eric Huff and Pranjal R. S},
journal= {arXiv preprint arXiv:2510.18011},
year = {2026}
}
Comments
9 pages, 4 figures, published in PRD