论文标题

完成的SDSS-IV扩展的Baryon振荡光谱调查:宇宙空隙的结构测量的增长率

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

论文作者

Aubert, Marie, Cousinou, Marie-Claude, Escoffier, Stéphanie, Hawken, Adam J., Nadathur, Seshadri, Alam, Shadab, Bautista, Julian, Burtin, Etienne, Chuang, Chia-Hsun, de la Macorra, Axel, de Mattia, Arnaud, Gil-Marín, Héctor, Hou, Jiamin, Jullo, Eric, Kneib, Jean-Paul, Neveux, Richard, Rossi, Graziano, Schneider, Donald, Smith, Alex, Tamone, Amélie, Magaña, Mariana Vargas, Zhao, Cheng

论文摘要

我们使用完整的Sloan Digital Sky Survey IV(SDSS-IV)扩展BARYON振荡光谱调查(EBOSS)DR16样品,在配置空间中进行了空隙聚类分析。这些样品由发光的红色星系(LRG)组成,结合了SDSS-III BARYON振荡光谱调查(BOSS)DR12 CMASS星系(称为LRG+CMASS样本),发射线星系(ELG)和Quasars(QSO)。我们使用基于Zobov的算法从三个EBOSS DR16样品中构建空隙目录,分别在LRG+CMASS,ELG和QSO样品中提供2,814个空隙,1,801个空隙和4,347个voids,涵盖了Redshift范围0.6 <z <z <z <2.2 $。我们使用各向异性空隙 - 摩肌互相关函数来测量空隙周围的红移空间扭曲(RSD),并提取失真参数$β$。在将其应用于数据之前,我们在现实模拟上测试了方法,并研究了这些模拟的所有系统错误。我们发现$β^{\ rm lrg}(z = 0.74)= 0.415 \ pm0.087 $,$β^{\ rm elg}(z = 0.85)= 0.665 \ pm0.125 $和$β^^{\ rm qSO} {\ rm qSO}($ qSO}($ qSO} {$ qSO} = 1.48)= 1.48)= 1.48)= 0.3313 LRG+CMASS,ELG和QSO样品。引用的错误包括系统和统计贡献。 In order to convert our measurements in terms of the growth rate $fσ_8$, we use consensus values of linear bias from the eBOSS DR16 companion papers~\citep{eBOSScosmo}, resulting in the following constraints: $fσ_8(z=0.74)=0.50\pm0.11$, $fσ_8(z=0.85)=0.52\pm0.10$ and $fσ_8(z = 1.48)= 0.30 \ pm0.13 $。我们的测量与使用常规聚类技术的EBOSS DR16的其他测量相一致。

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 $β$. 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 $β^{\rm LRG}(z=0.74)=0.415\pm0.087$, $β^{\rm ELG}(z=0.85)=0.665\pm0.125$ and $β^{\rm QSO}(z=1.48)=0.313\pm0.134$, 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 $fσ_8$, we use consensus values of linear bias from the eBOSS DR16 companion papers~\citep{eBOSScosmo}, resulting in the following constraints: $fσ_8(z=0.74)=0.50\pm0.11$, $fσ_8(z=0.85)=0.52\pm0.10$ and $fσ_8(z=1.48)=0.30\pm0.13$. Our measurements are consistent with other measurements from eBOSS DR16 using conventional clustering techniques.

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