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arXiv 2107.04602astro-ph.CO
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暗能量巡天第三年结果:用于BAO分析的星系模拟星表

Dark Energy Survey Year 3 Results: Galaxy mock catalogs for BAO analysis

I. Ferrero, M. Crocce, I. Tutusaus, A. Porredon, L. Blot, P. Fosalba, A. Carnero Rosell, S. Avila, A. Izard, J. Elvin-Poole, K. C. Chan, H. Camacho, R. Rosenfel… 展开作者

I. Ferrero, M. Crocce, I. Tutusaus, A. Porredon, L. Blot, P. Fosalba, A. Carnero Rosell, S. Avila, A. Izard, J. Elvin-Poole, K. C. Chan, H. Camacho, R. Rosenfeld, E. Sanchez, P. Tallada-Crespí, J. Carretero, I. Sevilla-Noarbe, E. Gaztanaga, F. Andrade-Oliveira, J. De Vicente, J. Mena-Fernández, A. J. Ross, D. Sanchez Cid, A. Ferté, A. Brandao-Souza, X. Fang, E. Krause, D. Gomes, M. Aguena, S. Allam, J. Annis, E. Bertin, D. Brooks, M. Carrasco Kind, F. J. Castander, R. Cawthon, A. Choi, C. Conselice, M. Costanzi, L. N. da Costa, M. E. S. Pereira, H. T. Diehl, P. Doel, A. Drlica-Wagner, S. Everett, A. E. Evrard, B. Flaugher, J. Frieman, J. García-Bellido, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, B. Hoyle, D. Huterer, D. J. James, K. Kuehn, M. Lima, M. A. G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, R. Morgan, J. Muir, R. L. C. Ogando, A. Palmese, F. Paz-Chinchón, W. J. Percival, A. A. Plazas Malagón, M. Rodriguez-Monroy, V. Scarpine, M. Schubnell, S. Serrano, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, D. L. Tucker, T. N. Varga

摘要:

模拟中科学分析的校准和验证是确保观测宇宙学中无偏见和可靠结果的基本工具。特别是,模拟星系表是一个至关重要的资源,以实现这些目标的测量重子声学振荡(BAO)的星系团。在这里,我们提出了一套1952年的星系模拟目录,旨在模仿暗能量调查(DES)3年BAO样本在其整个光度红移范围$0.6<z_{\rm photo}<1.1$。模拟是基于488冰COLA快速$N$体模拟的全天空光锥,并通过填充晕星系,使用混合晕占据分布-晕丰度匹配模型。该模型有10个自由参数,这是第一次,使用自动似然最小化程序。我们还介绍了一种新的技术来分配光度红移的模拟星系,下面的二维概率分布与VIMOS公共河外红移巡天(VIPERS)数据。校准的目的是匹配观测到的丰富的星系作为光度红移的函数,光度红移误差的分布,和聚类幅度的尺度小于用于BAO测量。进行了详尽的分析,以确保模拟重现输入属性。最后,通过将角关联函数$w(θ)$、角功率谱$C_\ell$和投影聚类$ξ_p(r_\perp)$与理论预测和数据进行比较来测试模拟。卷复制的影响估计的协方差也进行了研究。在准确再现的光度红移的不确定性和星系集群的红移函数的成功,使这个模拟创建管道作为未来的光度星系调查分析的基准。

英文摘要:

The calibration and validation of scientific analysis in simulations is a fundamental tool to ensure unbiased and robust results in observational cosmology. In particular, mock galaxy catalogs are a crucial resource to achieve these goals in the measurement of baryon acoustic oscillation (BAO) in the clustering of galaxies. Here we present a set of 1952 galaxy mock catalogs designed to mimic the Dark Energy Survey (DES) Year 3 BAO sample over its full photometric redshift range $0.6<z_{\rm photo}<1.1$. The mocks are based upon 488 ICE-COLA fast $N$-body simulations of full-sky light cones and were created by populating halos with galaxies, using a hybrid halo occupation distribution - halo abundance matching model. This model has ten free parameters, which were determined, for the first time, using an automatic likelihood minimization procedure. We also introduced a novel technique to assign photometric redshift for simulated galaxies, following a two-dimensional probability distribution with VIMOS Public Extragalactic Redshift Survey (VIPERS) data. The calibration was designed to match the observed abundance of galaxies as a function of photometric redshift, the distribution of photometric redshift errors, and the clustering amplitude on scales smaller than those used for BAO measurements. An exhaustive analysis was done to ensure that the mocks reproduce the input properties. Finally, mocks were tested by comparing the angular correlation function $w(θ)$, angular power spectrum $C_\ell$, and projected clustering $ξ_p(r_\perp)$ to theoretical predictions and data. The impact of volume replication in the estimate of the covariance is also investigated. The success in accurately reproducing the photometric redshift uncertainties and the galaxy clustering as a function of redshift render this mock creation pipeline as a benchmark for future analyses of photometric galaxy surveys.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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