暗能量巡天第一年结果：用于 BAO 测量的星系样本
宇宙学与河外天体物理
2018-12-17 v2
摘要
我们定义并刻画了从暗能量巡天第一年中提取的 130 万星系样本，该样本针对在显著红移不确定度下测量重子声学振荡进行了优化。样本以位于红移 的亮红星系为主。我们利用颜色和星等截断定义了精确选取，在过程中使用相应的预测 BAO 距离误差作为评价准则，以平衡高数密度与小测光红移不确定度的需求。典型 photo- 不确定度从 到 由 变化至 （以 1+ 为单位），在宽度 的层析红移箱中数密度从每 deg 到 个星系。接下来我们总结了测光红移估计的验证。我们刻画并缓解了包括恒星污染在内的观测系统误差，并表明大尺度上的成团性在这些污染物面前是稳健的。我们表明自相关和互相关中的成团信号总体上与理论模型一致，这作为对红移分布的额外检验。
引用
@article{arxiv.1712.06211,
title = {Dark Energy Survey Year 1 Results: Galaxy Sample for BAO Measurement},
author = {M. Crocce and A. J. Ross and I. Sevilla-Noarbe and E. Gaztanaga and J. Elvin-Poole and S. Avila and A. Alarcon and K. C. Chan and N. Banik and J. Carretero and E. Sanchez and W. G. Hartley and C. Sanchez and T. Giannantonio and R. Rosenfeld and A. I. Salvador and M. Garcia-Fernandez and J. Garcia-Bellido and T. M. C. Abbott and F. B. Abdalla and S. Allam and J. Annis and K. Bechtol and A. Benoit-Levy and G. M. Bernstein and R. A. Bernstein and E. Bertin and D. Brooks and E. Buckley-Geer and A. Carnero Rosell and M. Carrasco Kind and F. J. Castander and R. Cawthon and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and C. Davis and J. De Vicente and S. Desai and H. T. Diehl and P. Doel and A. Drlica-Wagner and T. F. Eifler and P. Fosalba and J. Frieman and J. Garcia-Bellido and D. W. Gerdes and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and D. Hollowood and K. Honscheid and B. Jain and D. J. James and E. Krause and K. Kuehn and S. Kuhlmann and N. Kuropatkin and O. Lahav and M. Lima and M. A. G. Maia and J. L. Marshall and P. Martini and F. Menanteau and C. J. Miller and R. Miquel and R. C. Nichol and W. J. Percival and A. A. Plazas and M. Sako and V. Scarpine and R. Schindler and D. Scolnic and E. Sheldon and M. Smith and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and D. L. Tucker and V. Vikram and A. R. Walker and B. Yanny and Y. Zhang},
journal= {arXiv preprint arXiv:1712.06211},
year = {2018}
}
备注
15 pages, 12 figures. Added discussion on photo-z validation and other tests added based on referee's comments. Matches published version in MNRAS