Multiprobe strategies for Kinematic Lensing with the Roman Space Telescope High Latitude Wide Area Survey
Abstract
In its latest design, the High Latitude Wide Area Survey (HLWAS) Medium Tier comprises overlapping photometric and spectroscopic data across 2,300 square degrees. This dataset enables Kinematic Lensing (KL), a Weak Lensing (WL) technique that exploits galaxy kinematics to control for shape noise, the dominant statistical limitation of traditional WL. We present several simulated analyses quantifying the expected cosmological science return of a Roman KL analysis with the latest design of the HLWAS: We explore KL prospects with early Roman data from the Deep Tier fields and from the early Medium Tier fields; we demonstrate the impact of different roll-angle choices on the KL performance; we benchmark KL against traditional WL; we introduce a KL-based multiprobe analysis that jointly models KL, galaxy clustering, and galaxy-galaxy lensing. In these analyses, we consider systematics, including photometric uncertainties, shear calibration bias, galaxy bias, and baryonic feedback. Our results show that KL alone achieves a dark energy figure of merit (FoM) of 22.54, which is more than a factor of two improvement over a corresponding WL analysis. The KL multiprobe approach improves the full-survey FoM to 34.58, even assuming conservative scale cuts in the clustering and galaxy-galaxy lensing. For the HLWAS roll-angle strategy, we find that the current plan of 4 passes with rotations of approximately 0, 10, 170, 180 degrees are near optimal for KL.
Related
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BibTeX
@misc{huang2026multiprobe,
title = {{Multiprobe strategies for Kinematic Lensing with the Roman Space Telescope High Latitude Wide Area Survey}},
author = {Yu-Hsiu Huang and Jiachuan Xu and Tim Eifler and Elisabeth Krause and Spencer Everett and Fabian Hervas-Peters and Pranjal R. S. and Eric Huff and Yan Xiang Lai},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.03497},
eprint = {2611.03497},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.03497},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Multiprobe strategies for Kinematic Lensing with the Roman Space Telescope High Latitude Wide Area Survey
AU - Yu-Hsiu Huang
AU - Jiachuan Xu
AU - Tim Eifler
AU - Elisabeth Krause
AU - Spencer Everett
AU - Fabian Hervas-Peters
AU - Pranjal R. S.
AU - Eric Huff
AU - Yan Xiang Lai
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2611.03497
UR - https://arxiv.org/abs/2611.03497
AB - In its latest design, the High Latitude Wide Area Survey (HLWAS) Medium Tier comprises overlapping photometric and spectroscopic data across 2,300 square degrees. This dataset enables Kinematic Lensing (KL), a Weak Lensing (WL) technique that exploits galaxy kinematics to control for shape noise, the dominant statistical limitation of traditional WL. We present several simulated analyses quantifying the expected cosmological science return of a Roman KL analysis with the latest design of the HLWAS: We explore KL prospects with early Roman data from the Deep Tier fields and from the early Medium Tier fields; we demonstrate the impact of different roll-angle choices on the KL performance; we benchmark KL against traditional WL; we introduce a KL-based multiprobe analysis that jointly models KL, galaxy clustering, and galaxy-galaxy lensing. In these analyses, we consider systematics, including photometric uncertainties, shear calibration bias, galaxy bias, and baryonic feedback. Our results show that KL alone achieves a dark energy figure of merit (FoM) of 22.54, which is more than a factor of two improvement over a corresponding WL analysis. The KL multiprobe approach improves the full-survey FoM to 34.58, even assuming conservative scale cuts in the clustering and galaxy-galaxy lensing. For the HLWAS roll-angle strategy, we find that the current plan of 4 passes with rotations of approximately 0, 10, 170, 180 degrees are near optimal for KL.
ER -