各向异性红移空间星系关联函数：在BAO环上的探测
The anisotropic redshift space galaxy correlation function: detection on the BAO Ring
摘要：
在最近的一系列论文中，我们研究了最新光谱SDSS数据中LRG星系的成团，其中有75000个LRG星系，采样率为1.1 Gpc^3/h^3至z=0.47。在这里，我们专注于检测一个局部极大值，形状为一个圆环的二维星系关联函数π（pi，sigma），分离在垂直σ和视线π距离。我们发现在r ~110 Mpc/h时有一个明显的峰。环的整体形状和位置与它起源于复合时期的重子声学振荡（BAO）相一致。这一一致性为目前对宇宙中大尺度结构如何形成的理解提供了支持。我们研究的意义，这样的功能，使用大型模拟星系模拟提供准确的误差。
英文摘要：
In a series of papers we have recently studied the clustering of LRG galaxies in the latest spectroscopic SDSS data release, which has 75000 LRG galaxies sampling 1.1 Gpc^3/h^3 to z=0.47. Here we focus on detecting a local maxima shaped as a circular ring in the bidimensional galaxy correlation function ξ(pi,sigma), separated in perpendicular σand line-of-sight πdistances. We find a significant detection of such a peak at r ~110 Mpc/h. The overall shape and location of the ring is consistent with it originating from the recombination-epoch baryon acoustic oscillations (BAO). This agreement provides support for the current understanding of how large scale structure forms in the universe. We study the significance of such feature using large mock galaxy simulations to provide accurate errorbars.
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