Constraining galaxy cluster temperatures and redshifts with eROSITA survey data
Constraining galaxy cluster temperatures and redshifts with eROSITA survey data
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DOI：
10.1051/0004-6361/201322643
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发表时间：
2014-04
影响因子：
6.5
通讯作者：
K. Borm;T. Reiprich;I. Mohammed;L. Lovisari
中科院分区：
文献类型：
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作者：
K. Borm;T. Reiprich;I. Mohammed;L. Lovisari
上下文。暗能量的本质烙印在宇宙的大尺度结构中，因此也烙印在星系团的质量和红移分布中。即将到来的eROSITA任务将利用这种探测暗能量的方法，在x射线中探测大约10万个星系团。目标。为了进行精确的宇宙学分析，需要高精度地测量各种星系团的性质。为了预测eROSITA星系团的这些特征并优化光学后续观测，我们估计了eROSITA能够从x射线光谱中确定星系团温度和红移的精度和准确度。此外，我们还从eROSITA调查中给出了这两个属性可用的集群总数
Context. The nature of dark energy is imprinted in the large-scale structure of the Universe and thus in the mass and redshift distribution of galaxy clusters. The upcoming eROSITA mission will exploit this method of probing dark energy by detecting ∼ 100, 000 clusters of galaxies in X-rays. Aims. For a precise cosmological analysis the various galaxy cluster properties need to be measured with high precision and accuracy. To predict these characteristics of eROSITA galaxy clusters and to optimise optical follow-up observations, we estimate the precision and the accuracy with which eROSITA will be able to determine galaxy cluster temperatures and redshifts from X-ray spectra. Additionally, we present the total number of clusters for which these two properties will be available from the eROSITA survey