Precision cosmology with a wide area XMM cluster survey

Precision cosmology with a wide area XMM cluster survey
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通过广域 XMM 星团巡天进行精密宇宙学

DOI:
10.1111/j.1365-2966.2011.18511.x
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发表时间:
2011
影响因子:
4.8
通讯作者:
Pierre
Pierre
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Pierre

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我们探索宇宙学的约束,预计从广域XMM型集群调查覆盖50-200 deg 2,在现实的观测条件下。我们进行了Fisher矩阵分析,结合两点聚类相关函数的估计的聚类数计数的基础上。调查设计的效果是通过一个观测测试良好的集群选择功能。特别注意的是给建模的散粒噪声和样本方差,我们估计通过应用我们的选择函数数值模拟调查。然后,我们推断暗能量的状态方程的约束,考虑各种调查配置。我们定量地研究了团簇质量测量、相关函数和1 <z< 2团簇人口的各自影响。我们表明,与一些20 MsXMM观测时间,它是可能的约束暗能量参数在一个水平,预计从下一代的宇宙探测器。这样的调查也有能力提供独特的见解高红移星系团的物理和活动星系核的属性。
We explore the cosmological constraints expected from wide areaXMM-type cluster surveys covering 50–200 deg2, under realistic observing conditions. We perform a Fisher matrix analysis, based on cluster number counts in combination with estimates of the two-point cluster correlation function. The effect of the survey design is implemented through an observationally well-tested cluster selection function. Special attention is given to the modelling of the shot noise and sample variance, which we estimate by applying our selection function to numerically simulated surveys. We then infer the constraints on the equation of state of the dark energy, considering various survey configurations. We quantitatively investigate the respective impact of the cluster mass measurements, of the correlation function and of the 1 <z< 2 cluster population. We show that, with some 20 MsXMMobserving time, it is possible to constrain the dark energy parameters at a level comparable to that expected from the next generation of cosmic probes. Such a survey also has the power to provide unique insights into the physics of high-redshift clusters and the properties of active galactic nuclei.
DOI: 10.1111/j.1365-2966.2010.17573.x
发表时间: 2010-01
影响因子: 4.8
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