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arXiv 0712.0262astro-ph
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XMM-LSS团簇样本及其宇宙学应用。XMM未来十年的前景

The XMM-LSS cluster sample and its cosmological applications. Prospects for the XMM next decade

M. Pierre, F. Pacaud, J. B. Melin, the XMM-LSS consortium

摘要:

定义良好的选择功能的XMM-LSS调查,使观察到的集群数计数和L-T关系的演变的同时建模。我们目前的结果有关的第一个5 deg 2的控制良好的样品,包括30个对象:它们是兼容的WMAP 3参数集,随着集群自相似的演变。将这样的调查扩展到200 deg 2将(1)允许区分集群L-T演化的主要场景和(2)提供一个独特的自给自足的σ 8和伽马的测定,分别为~ 5%和10%的准确度,当添加来自弱透镜和S-Z观测的质量信息时。

英文摘要:

The well defined selection function of the XMM-LSS survey enables a simultaneous modelling of the observed cluster number counts and of the evolution of the L-T relation. We present results pertaining to the first 5 deg2 for a well controlled sample comprising 30 objects: they are compatible with the WMAP3 parameter set along with cluster self-similar evolution. Extending such a survey to 200 deg2 would (1) allow discriminating between the major scenarios of the cluster L-T evolution and (2) provide a unique self-sufficient determination of sigma8 and Gamma with an accuracy of ~ 5% and 10% respectively, when adding mass information from weak lensing and S-Z observations.

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