暗能量巡天第一年结果：星系-星系透镜效应
宇宙学与河外天体物理
2018-09-05 v2
摘要
我们展示了来自暗能量巡天（DES）第一年（Y1）1321平方度数据的星系-星系透镜效应测量结果。透镜样本由66万个具有高精度测光红移的红色星系组成，称为redMaGiC，在红移范围内分为五个层析区间。我们使用了两个不同的源样本，分别来自Metacalibration（2600万个星系）和Im3shape（1800万个星系）剪切估计算法，并在红移范围内分为四个测光红移区间。我们对可能使星系-星系透镜信号产生偏差的潜在系统效应进行了广泛测试，包括来自剪切估计、测光红移和观测属性的效应。协方差通过数据的刀切法子样本获得，并通过一套对数正态模拟进行验证。我们使用剪切比几何检验来获得对源红移分布均值的独立约束，从而验证了使用相同数据进行的其他测光红移研究所得结果。我们发现，从星系-星系透镜测量和星系成团性测量得到的星系偏袒估计值具有一致性，因此表明在宇宙学分析所用尺度上测量的星系-物质交叉相关系数与1一致。本工作的结果展示了DES第一年数据宇宙学分析中使用的三个两点相关函数之一（另外两个是星系成团性和宇宙剪切），因此这里展示的方法论和系统效应检验为该研究以及DES和其他测光星系巡天未来的宇宙学分析提供了关键输入。
引用
@article{arxiv.1708.01537,
title = {Dark Energy Survey Year 1 Results: Galaxy-Galaxy Lensing},
author = {J. Prat and C. Sánchez and Y. Fang and D. Gruen and J. Elvin-Poole and N. Kokron and L. F. Secco and B. Jain and R. Miquel and N. MacCrann and M. A. Troxel and A. Alarcon and D. Bacon and G. M. Bernstein and J. Blazek and R. Cawthon and C. Chang and M. Crocce and C. Davis and J. De Vicente and J. P. Dietrich and A. Drlica-Wagner and O. Friedrich and M. Gatti and W. G. Hartley and B. Hoyle and E. M. Huff and M. Jarvis and M. M. Rau and R. P. Rollins and A. J. Ross and E. Rozo and E. S. Rykoff and S. Samuroff and E. Sheldon and T. N. Varga and P. Vielzeuf and J. Zuntz and T. M. C. Abbott and F. B. Abdalla and S. Allam and J. Annis and K. Bechtol and A. Benoit-Lévy and E. Bertin and D. Brooks and E. Buckley-Geer and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and S. Desai and H. T. Diehl and S. Dodelson and T. F. Eifler and E. Fernandez and B. Flaugher and P. Fosalba and J. Frieman and J. García-Bellido and E. Gaztanaga and D. W. Gerdes and T. Giannantonio and D. A. Goldstein and R. A. Gruendl and J. Gschwend and G. Gutierrez and K. Honscheid and D. J. James and T. Jeltema and M. W. G. Johnson and M. D. Johnson and D. Kirk and E. Krause and K. Kuehn and S. Kuhlmann and O. Lahav and T. S. Li and M. Lima and M. A. G. Maia and M. March and J. L. Marshall and P. Martini and P. Melchior and F. Menanteau and J. J. Mohr and R. C. Nichol and B. Nord and A. A. Plazas and A. K. Romer and A. Roodman and M. Sako and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and I. Sevilla-Noarbe 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 R. H. Wechsler and B. Yanny and Y. Zhang},
journal= {arXiv preprint arXiv:1708.01537},
year = {2018}
}
备注
26 pages, 19 figures. Matches the version accepted by PRD