The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: N-body mock challenge for the eBOSS emission line galaxy sample
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: N-body mock challenge for the eBOSS emission line galaxy sample
复制标题
DOI：
10.1093/mnras/stab1150
复制
发表时间：
2020-07
影响因子：
4.8
通讯作者：
S. Alam;A. D. Mattia;A. Tamone;S. Ávila;J. Peacock;V. Gonzalez-Perez;Alex Smith;A. Raichoor;A. Ross;J. Bautista;É. Burtin;J. Comparat;K. Dawson;Hélion Marie du Mas des Bourboux;S. Escoffier;H. Gil-Marín;S. Habib;K. Heitmann;Jiamin Hou;F. G. Mohammad;E. Mueller;R. Neveux;R. Paviot;W. Percival;G. Rossi;V. Ruhlmann-Kleider;R. Tojeiro;M. V. Magaña;Cheng Zhao;Gong-Bo Zhao
中科院分区：
文献类型：
--
作者：
S. Alam;A. D. Mattia;A. Tamone;S. Ávila;J. Peacock;V. Gonzalez-Perez;Alex Smith;A. Raichoor;A. Ross;J. Bautista;É. Burtin;J. Comparat;K. Dawson;Hélion Marie du Mas des Bourboux;S. Escoffier;H. Gil-Marín;S. Habib;K. Heitmann;Jiamin Hou;F. G. Mohammad;E. Mueller;R. Neveux;R. Paviot;W. Percival;G. Rossi;V. Ruhlmann-Kleider;R. Tojeiro;M. V. Magaña;Cheng Zhao;Gong-Bo Zhao
宇宙学的增长可以在光谱测量目标星系的红移空间星团中测量。准确预测星系团将需要了解星系物理，这是一个非常困难和高度非线性的问题。红移空间扭曲(RSD)的近似模型采用微扰方法来求解宇宙中暗物质和星系的演化。本文主要研究中等质量晕中的扩展重子振荡光谱(EBSS)发射线星系(ELG)。我们创建了一系列模拟星表，使用的是多重暗物质和外圈暗物质的N体模拟。我们的模拟星表包括受重子物理启发的各种效应，如组装偏差和卫星星系的运动学、动力学和偏离暗物质粒子的统计数据的特征。我们利用傅立叶空间的TNS RSD模型和位形空间的卷积拉格朗日微扰理论(CLPT)对这些模型进行了分析。我们的结论是，这两个RSD模型在我们的模拟的统计误差范围内提供了对RSD的无偏测量。在fσ8、α∥和α⊥模型中，我们得到了保守的理论系统不确定度分别为3.3、1.8和1.5。我们注意到，估计的理论系统误差比EBOSS ELG样本的统计误差小一个数量级，因此对于当前的EBOSS ELG分析来说可以忽略不计。
Cosmological growth can be measured in the redshift space clustering of galaxies targeted by spectroscopic surveys. Accurate prediction of clustering of galaxies will require understanding galaxy physics, which is a very hard and highly non-linear problem. Approximate models of redshift space distortion (RSD) take a perturbative approach to solve the evolution of dark matter and galaxies in the universe. In this paper, we focus on extended Baryon Oscillation Spectroscopic (eBOSS) emission line galaxies (ELGs) that live in intermediate mass haloes. We create a series of mock catalogues using haloes from the Multidark and outer rim dark matter only N-body simulations. Our mock catalogues include various effects inspired by baryonic physics such as assembly bias and the characteristics of satellite galaxies kinematics, dynamics, and statistics deviating from dark matter particles. We analyse these mocks using the TNS RSD model in Fourier space and the convolution Lagrangian perturbation theory (CLPT) in configuration space. We conclude that these two RSD models provide an unbiased measurement of RSD within the statistical error of our mocks. We obtain the conservative theoretical systematic uncertainty of $3.3{{\ \rm per\ cent}}$, $1.8{{\ \rm per\ cent}}$, and $1.5{{\ \rm per\ cent}}$ in fσ8, α∥, and α⊥, respectively, for the TNS and CLPT models. We note that the estimated theoretical systematic error is an order of magnitude smaller than the statistical error of the eBOSS ELG sample and hence are negligible for the purpose of the current eBOSS ELG analysis.