KiLeR combines shear ratios with kinematic intrinsic shapes to mitigate first-order lensing systematics and forecasts a 192% improvement in dark energy constraints from the Roman telescope.
Cosmic shear with one component and its application to future radio surveys
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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.
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Presents one-component KL as a lower-effort alternative to full KL for cosmic shear that simulations show is not yet competitive with WL for shallow HI radio surveys but could exceed WL for deeper spectroscopic surveys with stronger emission lines.
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Kinematic Lensing Ratio: Reviving Weak Lensing Cosmography as a Geometric Dark Energy Probe
KiLeR combines shear ratios with kinematic intrinsic shapes to mitigate first-order lensing systematics and forecasts a 192% improvement in dark energy constraints from the Roman telescope.
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Cosmic shear with one component and its application to future radio surveys
Presents one-component KL as a lower-effort alternative to full KL for cosmic shear that simulations show is not yet competitive with WL for shallow HI radio surveys but could exceed WL for deeper spectroscopic surveys with stronger emission lines.