KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes
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| Format: | Preprint |
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2025
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| _version_ | 1866912662900703232 |
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| author | Stölzner, Benjamin Wright, Angus H. Asgari, Marika Heymans, Catherine Hildebrandt, Hendrik Hoekstra, Henk Joachimi, Benjamin Kuijken, Konrad Li, Shun-Sheng Mahony, Constance Reischke, Robert Yoon, Mijin Bilicki, Maciej Burger, Pierre Chisari, Nora Elisa Dvornik, Andrej Georgiou, Christos Giblin, Benjamin Harnois-Déraps, Joachim Jalan, Priyanka William, Anjitha John Joudaki, Shahab Lesci, Giorgio Francesco Linke, Laila Loureiro, Arthur Maturi, Matteo Moscardini, Lauro Napolitano, Nicola R. Porth, Lucas Radovich, Mario Tröster, Tilman Valentijn, Edwin von Wietersheim-Kramsta, Maximilian Wittje, Anna Yan, Ziang Zhang, Yun-Hao |
| author_facet | Stölzner, Benjamin Wright, Angus H. Asgari, Marika Heymans, Catherine Hildebrandt, Hendrik Hoekstra, Henk Joachimi, Benjamin Kuijken, Konrad Li, Shun-Sheng Mahony, Constance Reischke, Robert Yoon, Mijin Bilicki, Maciej Burger, Pierre Chisari, Nora Elisa Dvornik, Andrej Georgiou, Christos Giblin, Benjamin Harnois-Déraps, Joachim Jalan, Priyanka William, Anjitha John Joudaki, Shahab Lesci, Giorgio Francesco Linke, Laila Loureiro, Arthur Maturi, Matteo Moscardini, Lauro Napolitano, Nicola R. Porth, Lucas Radovich, Mario Tröster, Tilman Valentijn, Edwin von Wietersheim-Kramsta, Maximilian Wittje, Anna Yan, Ziang Zhang, Yun-Hao |
| contents | We present a cosmic shear consistency analysis of the final data release from the Kilo-Degree Survey (KiDS-Legacy). By adopting three tiers of consistency metrics, we compare cosmological constraints between subsets of the KiDS-Legacy dataset split by redshift, angular scale, galaxy colour and spatial region. We also review a range of two-point cosmic shear statistics. With the data passing all our consistency metric tests, we demonstrate that KiDS-Legacy is the most internally consistent KiDS catalogue to date. In a joint cosmological analysis of KiDS-Legacy and DES Y3 cosmic shear, combined with data from the Pantheon+ Type Ia supernovae compilation and baryon acoustic oscillations from DESI Y1, we find constraints consistent with Planck measurements of the cosmic microwave background with $S_8\equiv σ_8\sqrt{Ω_{\rm m}/0.3} = 0.814^{+0.011}_{-0.012}$ and $σ_8 = 0.802^{+0.022}_{-0.018}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_19442 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes Stölzner, Benjamin Wright, Angus H. Asgari, Marika Heymans, Catherine Hildebrandt, Hendrik Hoekstra, Henk Joachimi, Benjamin Kuijken, Konrad Li, Shun-Sheng Mahony, Constance Reischke, Robert Yoon, Mijin Bilicki, Maciej Burger, Pierre Chisari, Nora Elisa Dvornik, Andrej Georgiou, Christos Giblin, Benjamin Harnois-Déraps, Joachim Jalan, Priyanka William, Anjitha John Joudaki, Shahab Lesci, Giorgio Francesco Linke, Laila Loureiro, Arthur Maturi, Matteo Moscardini, Lauro Napolitano, Nicola R. Porth, Lucas Radovich, Mario Tröster, Tilman Valentijn, Edwin von Wietersheim-Kramsta, Maximilian Wittje, Anna Yan, Ziang Zhang, Yun-Hao Cosmology and Nongalactic Astrophysics We present a cosmic shear consistency analysis of the final data release from the Kilo-Degree Survey (KiDS-Legacy). By adopting three tiers of consistency metrics, we compare cosmological constraints between subsets of the KiDS-Legacy dataset split by redshift, angular scale, galaxy colour and spatial region. We also review a range of two-point cosmic shear statistics. With the data passing all our consistency metric tests, we demonstrate that KiDS-Legacy is the most internally consistent KiDS catalogue to date. In a joint cosmological analysis of KiDS-Legacy and DES Y3 cosmic shear, combined with data from the Pantheon+ Type Ia supernovae compilation and baryon acoustic oscillations from DESI Y1, we find constraints consistent with Planck measurements of the cosmic microwave background with $S_8\equiv σ_8\sqrt{Ω_{\rm m}/0.3} = 0.814^{+0.011}_{-0.012}$ and $σ_8 = 0.802^{+0.022}_{-0.018}$. |
| title | KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2503.19442 |