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arXiv 1509.06404astro-ph.COastro-ph.GA
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SDSS-III重子振荡光谱巡天中的星系团:模拟最终数据中BOSS-CMASS星系团和晕占据分布

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Modeling the clustering and halo occupation distribution of BOSS-CMASS galaxies in the Final Data Release

Sergio A. Rodríguez-Torres, Chia-Hsun Chuang, Francisco Prada, Hong Guo, Anatoly Klypin, Peter Behroozi, Chang Hoon Hahn, Johan Comparat, Gustavo Yepes, Antonio… 展开作者

Sergio A. Rodríguez-Torres, Chia-Hsun Chuang, Francisco Prada, Hong Guo, Anatoly Klypin, Peter Behroozi, Chang Hoon Hahn, Johan Comparat, Gustavo Yepes, Antonio D. Montero-Dorta, Joel R. Brownstein, Claudia Maraston, Cameron K. McBride, Jeremy Tinker, Stefan Gottlöber, Ginevra Favole, Yiping Shu, Francisco-Shu Kitaura, Adam Bolton, Román Scoccimarro, Lado Samushia, David Schlegel, Donald P. Schneider, Daniel Thomas

摘要:

本文研究了来自最终SDSS-III数据发布的红移范围为0.43 < z < 0.7的BOSS CMASS星系的成团和晕占据分布。我们比较了BOSS的结果与预测的晕晕匹配(HAM)聚类模型,分配星系的暗物质晕从大BigMultiDark $N$体模拟的一个单位$Λ$ CDM普朗克宇宙学。我们比较了观测数据与模拟的光锥构造从20个后续输出的模拟。观测效果,如不完整性,几何形状,否决面具和纤维碰撞包括在模型中,它再现1- $σ$误差内的2点关联函数在所有相关的尺度观察到的振幅:从最小的尺度,0.5 $h^{-1}$兆秒差距,到尺度超过重子声学振荡功能。该模型也非常符合BOSS星系功率谱(高达$k\sim1$ $h$ Mpc $^{-1}$),和三点关联函数。关联函数的四极矩与观测值呈现出一定的张力。我们讨论了可能的原因,可以解释这种分歧,包括目标选择的影响。总的来说,标准HAM模型非常好地描述了CMASS样本的聚类统计。我们比较了恒星晕质量关系的CMASS样品测量使用弱透镜在CFHT条纹82调查与我们的集群模型的预测,并找到一个很好的协议内1- $σ$。BigMD-BOSS光锥包括BOSS星系的属性和晕属性。

英文摘要:

We present a study of the clustering and halo occupation distribution of BOSS CMASS galaxies in the redshift range 0.43 < z < 0.7 drawn from the Final SDSS-III Data Release. We compare the BOSS results with the predictions of a Halo Abundance Matching (HAM) clustering model that assigns galaxies to dark matter halos selected from the large BigMultiDark $N$-body simulation of a flat $Λ$CDM Planck cosmology. We compare the observational data with the simulated ones on a light-cone constructed from 20 subsequent outputs of the simulation. Observational effects such as incompleteness, geometry, veto masks and fiber collisions are included in the model, which reproduces within 1-$σ$ errors the observed monopole of the 2-point correlation function at all relevant scales: from the smallest scales, 0.5 $h^{-1}$ Mpc, up to scales beyond the Baryonic Acoustic Oscillation feature. This model also agrees remarkably well with the BOSS galaxy power spectrum (up to $k\sim1$ $h$ Mpc$^{-1}$), and the Three-point correlation function. The quadrupole of the correlation function presents some tensions with observations. We discuss possible causes that can explain this disagreement, including target selection effects. Overall, the standard HAM model describes remarkably well the clustering statistics of the CMASS sample. We compare the stellar to halo mass relation for the CMASS sample measured using weak lensing in the CFHT Stripe 82 Survey with the prediction of our clustering model, and find a good agreement within 1-$σ$. The BigMD-BOSS light-cone including properties of BOSS galaxies and halo properties is made publicly available.

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