基于暗能量巡天科学验证数据的大尺度星系成团与星系-星系透镜宇宙学约束
宇宙学与河外天体物理
2016-10-12 v1
摘要
我们给出了利用暗能量巡天（DES）的红星系角成团及其与背景星系弱引力透镜的交叉关联联合分析得到的宇宙学约束。我们使用了来自科学验证（SV）观测周期的139平方度连续DES数据块。利用大尺度测量，在边际化七个 nuisance 参数和三个额外宇宙学参数后，我们将宇宙物质密度约束为 Omega_m = 0.31 +/- 0.09，物质功率谱的成团振幅约束为 sigma_8 = 0.74 +/- 0.13。这转化为在我们的 fiducial 透镜红移区间 0.35 <z< 0.5 下的 S_8 = sigma_8(Omega_m/0.3)^{0.16} = 0.74 +/- 0.12，而使用 0.2 <z< 0.5 范围内两个区间时 S_8 = 0.78 +/- 0.09。我们研究了在数据向量、建模和系统误差处理（包括测光红移和剪切校准不确定性）变化下结果的稳健性，发现导出的宇宙学参数具有一致性。我们展示了我们的结果与先前来自DES和其他数据集的宇宙学分析一致，并以DES角成团和星系-星系透镜与Planck CMB数据、重子声学振荡和Ia型超新星测量的联合分析作结。
引用
@article{arxiv.1604.07871,
title = {Cosmology from large scale galaxy clustering and galaxy-galaxy lensing with Dark Energy Survey Science Verification data},
author = {Juliana Kwan and Carles Sanchez and Joseph Clampitt and Jonathan Blazek and Martin Crocce and Bhuvnesh Jain and Joe Zuntz and Adam Amara and Matthew Becker and Gary Bernstein and Christopher Bonnett and Joseph DeRose and Scott Dodelson and Tim Eifler and Enrique Gaztanaga and Tommaso Giannantonio and Daniel Gruen and Will Hartley and Tomasz Kacprzak and Donnacha Kirk and Elisabeth Krause and Niall MacCrann and Ramon Miquel and Youngsoo Park and Ashley Ross and Eduardo Rozo and Eli Rykoff and Erin Sheldon and Michael A. Troxel and Risa Wechsler and Tim Abbott and Filipe Abdalla and Sahar Allam and Aurélien Benoit-Lévy and David Brooks and David Burke and Aurelio Carnero Rosell and Matias Carrasco Kind and Carlos Cunha and Chris D'Andrea and Luiz da Costa and Shantanu Desai and H. Thomas Diehl and Jörg Dietrich and Peter Doel and August Evrard and Enrique Fernandez and David Finley and Brenna Flaugher and Pablo Fosalba and Josh Frieman and David Gerdes and Robert Gruendl and Gaston Gutierrez and Klaus Honscheid and David James and Mike Jarvis and Kyler Kuehn and Ofer Lahav and Marcos Lima and Marcio Maia and Jennifer Marshall and Paul Martini and Peter Melchior and Joe Mohr and Robert Nichol and Brian Nord and Andres Plazas and Kevin Reil and Kathy Romer and Aaron Roodman and Eusebio Sanchez and Vic Scarpine and Ignacio Sevilla and R. Chris Smith and Marcelle Soares-Santos and Flavia Sobreira and Eric Suchyta and Molly Swanson and Gregory Tarle and Daniel Thomas and Vinu Vikram and Alistair Walker},
journal= {arXiv preprint arXiv:1604.07871},
year = {2016}
}
备注
18 pages, 13 figures, submitted to MNRAS