Gravitational redshift of galaxies in clusters from the sloan digital sky survey and the Baryon Oscillation spectroscopic survey.
Gravitational redshift of galaxies in clusters from the sloan digital sky survey and the Baryon Oscillation spectroscopic survey.
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来自斯隆数字巡天和重子振荡光谱巡天的星团中星系的引力红移。
DOI：
10.1103/physrevlett.114.071103
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发表时间：
2015
影响因子：
8.6
通讯作者：
Sadeh I
中科院分区：
文献类型：
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作者：
Sadeh I
引力红移效应允许人们直接探测星系团中的引力势。关于Wojtaket al [Nature（伦敦）477，567（2011）]，我们提出了一种新的测量。我们利用斯隆数字巡天和重子振荡光谱巡天第十次数据发布的新数据。我们比较光谱红移的最亮的星系团（BCGs）的星系在星系团的外围，使用的样本与平均质量的集群。我们发现这些星系与BCGs相比平均相对红移为，标准差为，。我们的测量结果与Wojtaket等人的测量结果一致。[Nature（伦敦）477，567（2011）]。然而，我们推导出的标准差更大，因为我们考虑了各种系统效应，超出了数据集的大小。这一结果与广义相对论的预言非常吻合。
The gravitational redshift effect allows one to directly probe the gravitational potential in clusters of galaxies. Following up on Wojtaket al.[Nature (London) 477, 567 (2011)], we present a new measurement. We take advantage of new data from the tenth data release of the Sloan Digital Sky Survey and the Baryon Oscillation Spectroscopic Survey. We compare the spectroscopic redshift of the brightest cluster galaxies (BCGs) with that of galaxies at the outskirts of clusters, using a sample with an average cluster mass of. We find that these galaxies have an average relative redshift ofcompared with that of BCGs, with a standard deviation ofand. Our measurement is consistent with that of Wojtaket al.[Nature (London) 477, 567 (2011)]. However, our derived standard deviation is larger, as we take into account various systematic effects, beyond the size of the data set. The result is in good agreement with the predictions from general relativity.