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arXiv 2007.09003astro-ph.CO
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已完成的SDSS-IV扩展重子振荡光谱巡天:类星体样品的N体模拟挑战

The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: N-body Mock Challenge for the Quasar Sample

Alex Smith, Etienne Burtin, Jiamin Hou, Richard Neveux, Ashley J. Ross, Shadab Alam, Jonathan Brinkmann, Kyle S. Dawson, Salman Habib, Katrin Heitmann, Jean-Pau… 展开作者

Alex Smith, Etienne Burtin, Jiamin Hou, Richard Neveux, Ashley J. Ross, Shadab Alam, Jonathan Brinkmann, Kyle S. Dawson, Salman Habib, Katrin Heitmann, Jean-Paul Kneib, Brad W. Lyke, Hélion du Mas des Bourboux, Eva-Maria Mueller, Adam D. Myers, Will J. Percival, Graziano Rossi, Donald P. Schneider, Pauline Zarrouk, Gong-Bo Zhao

摘要:

宇宙的增长率和膨胀历史可以通过使用阿尔科克-帕钦斯基效应的大星系红移测量来测量。我们验证了红移空间畸变模型的斯隆数字巡天(SDSS)扩展重子振荡光谱巡天(eBOSS)数据Release 16类星体聚类样本的最终分析中使用的配置和傅立叶空间,使用一系列HOD模拟目录使用OuterRim N体模拟。我们测试三个模型上的一系列非盲模拟,在OuterRim宇宙学,和盲模拟,这已被重新调整到新的宇宙学,并调查红移拖尾和灾难性的红移的影响。我们发现,对于非盲模拟,模型能够恢复$fσ_8$在3%以内,$α_\parallel$和$α_\bot$在1%以内。由于假设了不正确的基准宇宙学,盲模拟的测量结果的分散性更大。从这个模拟挑战中,我们发现所有三个模型都表现良好,在$σ_{fσ_8}=0.013$、$σ_{α_\parallel}=0.012$和$σ_{α_\bot}=0.008$水平上,$fσ_8$、$α_\parallel$和$α_\bot$的系统误差相似。合并共识的系统误差为$σ_{fσ_8}=0.011$、$σ_{α_\parallel}=0.008$和$σ_{α_\bot}=0.005$,用于最终DR 16分析。对于位形和傅立叶空间中的BAO拟合,我们采用$σ_{α_\parallel}=0.010$和$σ_{α_\bot}=0.007$的保守系统误差。

英文摘要:

The growth rate and expansion history of the Universe can be measured from large galaxy redshift surveys using the Alcock-Paczynski effect. We validate the Redshift Space Distortion models used in the final analysis of the Sloan Digital Sky Survey (SDSS) extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 16 quasar clustering sample, in configuration and Fourier space, using a series of HOD mock catalogues generated using the OuterRim N-body simulation. We test three models on a series of non-blind mocks, in the OuterRim cosmology, and blind mocks, which have been rescaled to new cosmologies, and investigate the effects of redshift smearing and catastrophic redshifts. We find that for the non-blind mocks, the models are able to recover $fσ_8$ to within 3% and $α_\parallel$ and $α_\bot$ to within 1%. The scatter in the measurements is larger for the blind mocks, due to the assumption of an incorrect fiducial cosmology. From this mock challenge, we find that all three models perform well, with similar systematic errors on $fσ_8$, $α_\parallel$ and $α_\bot$ at the level of $σ_{fσ_8}=0.013$, $σ_{α_\parallel}=0.012$ and $σ_{α_\bot}=0.008$. The systematic error on the combined consensus is $σ_{fσ_8}=0.011$, $σ_{α_\parallel}=0.008$ and $σ_{α_\bot}=0.005$, which is used in the final DR16 analysis. For BAO fits in configuration and Fourier space, we take conservative systematic errors of $σ_{α_\parallel}=0.010$ and $σ_{α_\bot}=0.007$.

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