暗能量巡天第三年结果：弱引力透镜源星系的红移定标
宇宙学与河外天体物理
2021-06-30 v2
摘要
确定暗能量巡天等宽场测光实验所观测星系的红移分布，是用引力透镜绘制物质密度场的关键组成部分。在这项工作中，我们描述了将暗能量巡天第三年弱引力透镜源星表里的单个弱透镜源星系分配到四个层析 bins 并估计这些 bins 中红移分布的方法。作为这些方法在数据上的首次应用，我们验证了所做假设适用于 DES Y3 弱透镜源星系，并给出了系统不确定性的完整处理。我们的方法包括结合三个独立似然函数的信息：自组织映射 （SOMPZ），一种从星系测光约束红移的方法；聚类红移（WZ），来自星系密度函数互相关的红移约束；以及剪切比（SR），其通过小尺度上星系-剪切关联函数之比提供红移约束。最后，我们描述了如何组合这些独立探针以产生封装我们全部不确定性的红移分布集合。我们以每个层析 bin 中均值红移上 的组合有效不确定性对红移进行了定标。
引用
@article{arxiv.2012.08566,
title = {Dark Energy Survey Year 3 Results: Redshift Calibration of the Weak Lensing Source Galaxies},
author = {J. Myles and A. Alarcon and A. Amon and C. Sánchez and S. Everett and J. DeRose and J. McCullough and D. Gruen and G. M. Bernstein and M. A. Troxel and S. Dodelson and A. Campos and N. MacCrann and B. Yin and M. Raveri and A. Amara and M. R. Becker and A. Choi and J. Cordero and K. Eckert and M. Gatti and G. Giannini and J. Gschwend and R. A. Gruendl and I. Harrison and W. G. Hartley and E. M. Huff and N. Kuropatkin and H. Lin and D. Masters and R. Miquel and J. Prat and A. Roodman and E. S. Rykoff and I. Sevilla-Noarbe and E. Sheldon and R. H. Wechsler and B. Yanny and T. M. C. Abbott and M. Aguena and S. Allam and J. Annis and D. Bacon and E. Bertin and S. Bhargava and S. L. Bridle and D. Brooks and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and C. Conselice and M. Costanzi and M. Crocce and L. N. da Costa and M. E. S. Pereira and S. Desai and H. T. Diehl and T. F. Eifler and J. Elvin-Poole and A. E. Evrard and I. Ferrero and A. Ferté and B. Flaugher and P. Fosalba and J. Frieman and J. García-Bellido and E. Gaztanaga and T. Giannantonio and S. R. Hinton and D. L. Hollowood and K. Honscheid and B. Hoyle and D. Huterer and D. J. James and E. Krause and K. Kuehn and O. Lahav and M. Lima and M. A. G. Maia and J. L. Marshall and P. Martini and P. Melchior and F. Menanteau and J. J. Mohr and R. Morgan and J. Muir and R. L. C. Ogando and A. Palmese and F. Paz-Chinchón and A. A. Plazas and M. Rodriguez-Monroy and S. Samuroff and E. Sanchez and V. Scarpine and L. F. Secco 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 T. N. Varga and J. Weller and W. Wester},
journal= {arXiv preprint arXiv:2012.08566},
year = {2021}
}
备注
See https://www.darkenergysurvey.org/des-year-3-cosmology-results-papers/ for the full DES Y3 cosmology release. 30 pages, 18 figures