Cosmic shear with one component and its application to future radio surveys
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914591832801280 |
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| author | Huang, Yu-Hsiu Krause, Elisabeth Eifler, Tim Bernstein, Gary Xu, Jiachuan Huff, Eric S, Pranjal R. |
| author_facet | Huang, Yu-Hsiu Krause, Elisabeth Eifler, Tim Bernstein, Gary Xu, Jiachuan Huff, Eric S, Pranjal R. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18011 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cosmic shear with one component and its application to future radio surveys Huang, Yu-Hsiu Krause, Elisabeth Eifler, Tim Bernstein, Gary Xu, Jiachuan Huff, Eric S, Pranjal R. Cosmology and Nongalactic Astrophysics 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. |
| title | Cosmic shear with one component and its application to future radio surveys |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.18011 |