暗能量巡天第三年结果：基于仿真器方法的峰统计宇宙学约束
宇宙学与河外天体物理
2022-01-26 v2
摘要
我们利用暗能量巡天（DES Y3）前三年的数据构建的质量图，通过剪切峰统计和角收敛功率谱，在 CDM 宇宙学模型中约束物质密度 和密度涨落幅度 。我们使用层析剪切峰统计，包括交叉峰：即对由两个层析红移区间的收敛度在谐空间相乘所得地图计算峰计数。我们的分析遵循前向建模方案，利用 N 体模拟和高斯过程仿真器构建这些统计量的似然。我们纳入了以下透镜系统误差：乘性剪切偏差、测光红移不确定度和星系内禀对齐。为避免未建模的重子物理带来的偏差，我们施加了严格的尺度截断。我们发现，额外的非高斯信息使结构增长参数的约束收紧，得到 （68% 置信限），精度为 1.8%，相比仅用角功率谱的情况改善了约 38%。角功率谱与峰计数所得结果彼此一致，且 无显著差异。我们发现本研究与 Planck 2018 结果存在 的轻微张力，我们的分析给出更低的 。此外，我们观察到角功率谱与层析峰计数的联合打破了星系内禀对齐 与 之间的简并，改善了宇宙学约束。我们开展了一系列检验，结论是我们的结果稳健且与其它使用 DES Y3 数据的研究一致。
引用
@article{arxiv.2110.10135,
title = {Dark Energy Survey Year 3 results: Cosmology with peaks using an emulator approach},
author = {D. Zürcher and J. Fluri and R. Sgier and T. Kacprzak and M. Gatti and C. Doux and L. Whiteway and A. Refregier and C. Chang and N. Jeffrey and B. Jain and P. Lemos and D. Bacon and A. Alarcon and A. Amon and K. Bechtol and M. Becker and G. Bernstein and A. Campos and R. Chen and A. Choi and C. Davis and J. Derose and S. Dodelson and F. Elsner and J. Elvin-Poole and S. Everett and A. Ferte and D. Gruen and I. Harrison and D. Huterer and M. Jarvis and P. F. Leget and N. Maccrann and J. Mccullough and J. Muir and J. Myles and A. Navarro Alsina and S. Pandey and J. Prat and M. Raveri and R. P. Rollins and A. Roodman and C. Sanchez and L. F. Secco and E. Sheldon and T. Shin and M. Troxel and I. Tutusaus and B. Yin and M. Aguena and S. Allam and F. Andrade-Oliveira and J. Annis and E. Bertin and D. Brooks and D. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. Castander and R. Cawthon and C. Conselice and M. Costanzi and L. da Costa and M. E. da Silva Pereira and T. Davis and J. De Vicente and S. Desai and H. T. Diehl and J. Dietrich and P. Doel and K. Eckert and A. Evrard and I. Ferrero and B. Flaugher and P. Fosalba and D. Friedel and J. Frieman and J. Garcia-Bellido and E. Gaztanaga and D. Gerdes and T. Giannantonio and R. Gruendl and J. Gschwend and G. Gutierrez and S. Hinton and D. L. Hollowood and K. Honscheid and B. Hoyle and D. James and K. Kuehn and N. Kuropatkin and O. Lahav and C. Lidman and M. Lima and M. Maia and J. Marshall and P. Melchior and F. Menanteau and R. Miquel and R. Morgan and A. Palmese and F. Paz-Chinchon and A. Pieres and A. Plazas Malagón and K. Reil and M. Rodriguez Monroy and K. Romer and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and I. Sevilla and M. Smith and E. Suchyta and G. Tarle and D. Thomas and C. To and T. N. Varga and J. Weller and R. Wilkinson},
journal= {arXiv preprint arXiv:2110.10135},
year = {2022}
}