暗能量巡天第三年结果：用于BAO测量的星系样本
宇宙学与河外天体物理
2021-11-17 v2
摘要
本文给出并验证了暗能量巡天（DES）Y3数据中用于重子声学振荡信号（BAO）分析的星系样本。其定义基于颜色和红移相关的星等截断，以优化筛选红移大于0.5的星系，同时确保高质量的光度红移测定。该样本覆盖约4100平方度，深度为（10σ）。它包含7,031,993个红移范围从=0.6到1.1的星系，平均有效红移为0.835。光度红移采用机器学习算法DNF估计，并使用VIPERS PDR2样本进行验证。我们发现平均红移偏差为，以为单位的平均不确定度为。我们评估了该样本的星系种群，显示其主要由椭圆星系到Sbc型星系构成。此外，我们发现恒星污染水平较低，为。我们提出了用于减轻由观测条件及其他大尺度系统误差引起的伪聚类效应的方法。我们将其应用于DES Y3 BAO样本，并计算样本权重，用于稳健估计星系聚类信号。本文是致力于DES Y3数据中BAO信号分析的一系列论文之一。在配套论文中，Ferrero等人（2021）和DES Collaboration（2021）分别给出了用于校准分析的星系模拟星表，以及通过拟合BAO尺度得到的角直径距离约束。星系样本、掩膜及补充材料将在接受后发布于公开DES数据仓库。
引用
@article{arxiv.2107.05477,
title = {Dark Energy Survey Year 3 Results: Galaxy Sample for BAO Measurement},
author = {A. Carnero Rosell and M. Rodriguez-Monroy and M. Crocce and J. Elvin-Poole and A. Porredon and I. Ferrero and J. Mena-Fernandez and R. Cawthon and J. De Vicente and E. Gaztanaga and A. J. Ross and E. Sanchez and I. Sevilla-Noarbe and O. Alves and F. Andrade-Oliveira and J. Asorey and S. Avila and A. Brandao-Souza and H. Camacho and K. C. Chan and A. Ferte and J. Muir and W. Riquelme and R. Rosenfeld and D. Sanchez Cid and W. G. Hartley and N. Weaverdyck and T. Abbott and M. Aguena and A. Sahar and J. Annis and E. Bertin and D. Brooks and E. Buckley-Geer and D. Burke and J. Calcino and D. Carollo and M. Carrasco Kind and J. Carretero and F. Castander and A. Choi and C. Conselice and M. Costanzi and L. da Costa and M. E. da Silva Pereira and T. Davis and S. Desai and H. T. Diehl and P. Doel and A. Drlica-Wagner and K. Eckert and S. Everett and A. Evrard and B. Flaugher and P. Fosalba and J. Frieman and J. Garcia-Bellido and D. Gerdes and T. Giannantonio and K. Glazebrook and D. Gruen and R. Gruendl and J. Gschwend and G. Gutierrez and S. Hinton and D. Hollowood and K. Honscheid and B. Hoyle and D. Huterer and D. James and A. Kim and E. Krause and K. Kuehn and O. Lahav and G. Lewis and C. Lidman and M. Lima and M. Maia and U. Malik and J. Marshall and F. Menanteau and R. Miquel and J. Mohr and A. Moller and R. Morgan and R. Ogando and A. Palmese and F. Paz-Chinchon and W. Percival and A. Pieres and A. Plazas Malagon and A. Roodman and V. Scarpine and M. Schubnell and S. Serrano and R. Sharp and E. Sheldon and M. Smith and M. Soares-Santos and E. Suchyta and M. Swanson and G. Tarle and D. Thomas and C. To and B. Tucker and D. Tucker and S. Uddin and T. N. Varga and DES Collaboration},
journal= {arXiv preprint arXiv:2107.05477},
year = {2021}
}
备注
Accepted for publication in MNRAS. 24 pages, 24 figures