暗能量巡天第三年结果:用于 BAO 分析的星系模拟星表
宇宙学与河外天体物理
2021-12-14 v2
摘要
在模拟中对科学分析进行校准与验证,是确保在观测宇宙学中获得无偏且稳健结果的基本工具。特别是,模拟星系星表是在星系成团性中测量重子声学振荡(BAO)以实现这些目标的关键资源。在此,我们给出一套 1952 个星系模拟星表,旨在模拟暗能量巡天(DES)第三年 BAO 样本在其全部测光红移范围 内的表现。这些模拟基于 488 个全天空光锥的 ICE-COLA 快速 体模拟,并通过混合晕占据分布–晕丰度匹配模型将星系填入晕中而创建。该模型有十个自由参数,我们首次使用自动似然最小化程序确定了它们。我们还引入了一种为模拟星系分配测光红移的新技术,遵循基于 VIMOS 公共河外红移巡天(VIPERS)数据的二维概率分布。校准旨在匹配作为测光红移函数的星系观测丰度、测光红移误差分布,以及小于 BAO 测量所用尺度的成团振幅。我们做了详尽分析以确保模拟重现输入性质。最后,通过将角关联函数 、角功率谱 和投影成团性 与理论预测及数据比较来检验模拟。还研究了体积复制对协方差估计的影响。准确重现测光红移不确定性和作为红移函数的星系成团性的成功,使该模拟创建流程成为未来测光星系巡天分析的基准。
引用
@article{arxiv.2107.04602,
title = {Dark Energy Survey Year 3 Results: Galaxy mock catalogs for BAO analysis},
author = {I. Ferrero and M. Crocce and I. Tutusaus and A. Porredon and L. Blot and P. Fosalba and A. Carnero Rosell and S. Avila and A. Izard and J. Elvin-Poole and K. C. Chan and H. Camacho and R. Rosenfeld and E. Sanchez and P. Tallada-Crespí and J. Carretero and I. Sevilla-Noarbe and E. Gaztanaga and F. Andrade-Oliveira and J. De Vicente and J. Mena-Fernández and A. J. Ross and D. Sanchez Cid and A. Ferté and A. Brandao-Souza and X. Fang and E. Krause and D. Gomes and M. Aguena and S. Allam and J. Annis and E. Bertin and D. Brooks and M. Carrasco Kind and F. J. Castander and R. Cawthon and A. Choi and C. Conselice and M. Costanzi and L. N. da Costa and M. E. S. Pereira and H. T. Diehl and P. Doel and A. Drlica-Wagner and S. Everett and A. E. Evrard and B. Flaugher and J. Frieman and J. García-Bellido and D. W. Gerdes and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and B. Hoyle and D. Huterer and D. J. James and K. Kuehn and M. Lima and M. A. G. Maia and J. L. Marshall and F. Menanteau and R. Miquel and R. Morgan and J. Muir and R. L. C. Ogando and A. Palmese and F. Paz-Chinchón and W. J. Percival and A. A. Plazas Malagón and M. Rodriguez-Monroy 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 and D. L. Tucker and T. N. Varga},
journal= {arXiv preprint arXiv:2107.04602},
year = {2021}
}
备注
15 pages, 15 figures, Published on A&A