暗能量巡天第三年结果：利用小尺度信息通过透镜剪切比约束宇宙学
宇宙学与河外天体物理
2022-05-11 v2
摘要
利用暗能量巡天前三年的数据，我们使用围绕同一透镜样本的星系-星系透镜小尺度测量之比来约束源红移不确定性、内禀对齐以及我们模型中的其他 nuisance 参数。我们没有对比值使用简单的几何方法，而是使用星系-星系透镜测量的完整建模，包括对功率谱的相应积分以及来自内禀对齐和透镜放大的贡献。我们通过研究不同效应的影响（例如包含重子物理、非线性偏袒、晕占据分布描述以及透镜放大等），并使用真实的 体模拟，对小规模剪切比（SR）建模进行了广泛测试。我们通过使用两个独立的透镜样本，以及通过使用建模更简单的相应大尺度比值推导约束，验证了数据中约束的稳健性。DES Y3 结果展示了比值如何为我们模型中的多个 nuisance 参数提供显著的约束能力改进，特别是在源红移校准和内禀对齐（IA）上。对于源红移，SR 在某些红移区间将先验约束改进多达 38%。这些改进，尤其是其对 IA 提供的约束，在 SR 与宇宙剪切及其他 2pt 函数结合时转化为更紧的宇宙学约束。特别是，对于 DES Y3 数据，SR 将宇宙剪切的 约束改进多达 31%，对于探针的完整组合（32pt）改进多达 10%。本工作中给出的剪切比被用作宇宙剪切、22pt 和完整 32pt 在 DES Y3 基准宇宙学分析中的附加似然。
引用
@article{arxiv.2105.13542,
title = {Dark Energy Survey Year 3 Results: Exploiting small-scale information with lensing shear ratios},
author = {C. Sánchez and J. Prat and G. Zacharegkas and S. Pandey and E. Baxter and G. M. Bernstein and J. Blazek and R. Cawthon and C. Chang and E. Krause and P. Lemos and Y. Park and M. Raveri and J. Sanchez and M. A. Troxel and A. Amon and X. Fang and O. Friedrich and D. Gruen and A. Porredon and L. F. Secco and S. Samuroff and A. Alarcon and O. Alves and F. Andrade-Oliveira and K. Bechtol and M. R. Becker and H. Camacho and A. Campos and A. Carnero Rosell and M. Carrasco Kind and R. Chen and A. Choi and M. Crocce and C. Davis and J. De Vicente and J. DeRose and E. Di Valentino and H. T. Diehl and S. Dodelson and C. Doux and A. Drlica-Wagner and K. Eckert and T. F. Eifler and F. Elsner and J. Elvin-Poole and S. Everett and A. Ferté and P. Fosalba and M. Gatti and G. Giannini and R. A. Gruendl and I. Harrison and W. G. Hartley and K. Herner and E. M. Huff and D. Huterer and M. Jarvis and B. Jain and N. Kuropatkin and P. -F. Leget and N. MacCrann and J. McCullough and J. Muir and J. Myles and A. Navarro-Alsina and R. P. Rollins and A. Roodman and R. Rosenfeld and E. S. Rykoff and I. Sevilla-Noarbe and E. Sheldon and T. Shin and A. Troja and I. Tutusaus and T. N. Varga and R. H. Wechsler and B. Yanny and B. Yin and Y. Zhang and J. Zuntz and T. M. C. Abbott and M. Aguena and S. Allam and D. Bacon and E. Bertin and S. Bhargava and D. Brooks and E. Buckley-Geer and D. L. Burke and J. Carretero and M. Costanzi and L. N. da Costa and M. E. S. Pereira and S. Desai and J. P. Dietrich and P. Doel and A. E. Evrard and I. Ferrero and B. Flaugher and J. Frieman and J. García-Bellido and E. Gaztanaga and D. W. Gerdes and T. Giannantonio and J. Gschwend and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and B. Hoyle and D. J. James and K. Kuehn and O. Lahav and M. Lima and H. Lin and M. A. G. Maia and J. L. Marshall and P. Martini and P. Melchior and F. Menanteau and R. Miquel and J. J. Mohr and R. Morgan and A. Palmese and F. Paz-Chinchón and D. Petravick and A. Pieres and A. A. Plazas Malagón and M. Rodriguez-Monroy and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and M. Smith and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and C. To},
journal= {arXiv preprint arXiv:2105.13542},
year = {2022}
}
备注
29 pages, 17 figures, accepted by PRD. This version matches the published version