The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Growth rate of structure measurement from cosmic voids-猫眼课题宝

DOI：

10.1093/mnras/stac828

发表时间：

2020-07

期刊：

arXiv: Cosmology and Nongalactic Astrophysics

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

M. Aubert;M. Cousinou;S. Escoffier;A. Hawken;S. Nadathur;S. Alam;J. Bautista;É. Burtin;C. Chuang;A. Macorra;A. D. Mattia;H. Gil-Mar'in;Jiamin Hou;E. Jullo;J. Kneib;R. Neveux;G. Rossi;D. Schneider;Alex Smith;A. Tamone;M. V. Magaña;Cheng Zhao

我们提出了一个空的组态空间聚类分析使用完成斯隆数字巡天IV（SDSS-IV）扩展重子振荡光谱巡天（eBOSS）DR 16样品。这些样本包括亮红星系（LRG）与SDSS-III重子振荡光谱巡天（BOSS）DR 12 CMASS星系的高红移尾部（称为LRG+CMASS样本），发射线星系（ELG）和类星体（QSO）。我们使用基于ZOBOV的算法从三个eBOSS DR 16样本中构建了空洞目录，分别在LRG+CMASS，ELG和QSO样本中提供了2，814个空洞，1，801个空洞和4，347个空洞，跨越红移范围$0.6<z<2.2$。我们使用各向异性的空洞-星系互相关函数测量空洞周围的红移空间畸变（RSD），并提取畸变参数$\beta$。在将其应用于数据之前，我们在现实模拟上测试了该方法，并在这些模拟上调查了我们所有的系统误差。对于LRG+CMASS，ELG和类星体，我们分别得到$\beta^{\rm LRG}（z=0.74）=0.415\pm0.087$，$\beta^{\rm ELG}（z=0.85）=0.665\pm0.125$和$\beta^{\rm QSO}（z=1.48）=0.313\pm0.134$.引用的错误包括系统和统计贡献。为了将我们的测量值转换为增长率$f\sigma_8$，我们使用了eBOSS DR 16配套论文中的线性偏差的共识值，从而产生了以下约束：$f\sigma_8（z=0.74）=0.50\pm0.11$，$f\sigma_8（z=0.85）=0.52\pm0.10$和$f\sigma_8（z=1.48）=0.30\pm0.13$。我们的测量结果与使用传统聚类技术的eBOSS DR 16的其他测量结果一致。

We present a void clustering analysis in configuration-space using the completed Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 samples. These samples consist of Luminous Red Galaxies (LRG) combined with the high redshift tail of the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) DR12 CMASS galaxies (called as LRG+CMASS sample), Emission Line Galaxies (ELG) and quasars (QSO). We build void catalogues from the three eBOSS DR16 samples using a ZOBOV-based algorithm, providing 2,814 voids, 1,801 voids and 4,347 voids in the LRG+CMASS, ELG and QSO samples, respectively, spanning the redshift range $0.6<z<2.2$. We measure the redshift space distortions (RSD) around voids using the anisotropic void-galaxy cross-correlation function and we extract the distortion parameter $\beta$. We test the methodology on realistic simulations before applying it to the data, and we investigate all our systematic errors on these mocks. We find $\beta^{\rm LRG}(z=0.74)=0.415\pm0.087$, $\beta^{\rm ELG}(z=0.85)=0.665\pm0.125$ and $\beta^{\rm QSO}(z=1.48)=0.313\pm0.134$, for the LRG+CMASS, ELG and QSO sample, respectively. The quoted errors include systematic and statistical contributions. In order to convert our measurements in terms of the growth rate $f\sigma_8$, we use consensus values of linear bias from the eBOSS DR16 companion papers~\citep{eBOSScosmo}, resulting in the following constraints: $f\sigma_8(z=0.74)=0.50\pm0.11$, $f\sigma_8(z=0.85)=0.52\pm0.10$ and $f\sigma_8(z=1.48)=0.30\pm0.13$. Our measurements are consistent with other measurements from eBOSS DR16 using conventional clustering techniques.

The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Growth rate of structure measurement from cosmic voids

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