The XMM‐LSS survey: the Class 1 cluster sample over the initial 5 deg2 and its cosmological modelling★
The XMM‐LSS survey: the Class 1 cluster sample over the initial 5 deg2 and its cosmological modelling★
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XMM-LSS巡天：初始5deg2上的1类星团样本及其宇宙学模型★
DOI：
10.1111/j.1365-2966.2007.12468.x
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发表时间：
2007
影响因子：
4.8
通讯作者：
G. Trinchieri
中科院分区：
文献类型：
--
作者：
F. Pacaud;F. Pacaud;F. Pacaud;M. Pierre;C. Adami;B. Altieri;S. Andreon;L. Chiappetti;A. Detal;P. Duc;G. Galaz;A. Gueguen;J. Fèvre;G. Hertling;C. Libbrecht;J. Melin;T. Ponman;H. Quintana;A. Réfrégier;P. Sprimont;J. Surdej;I. Valtchanov;J. Willis;D. Alloin;M. Birkinshaw;M. Bremer;O. Garcet;C. Jean;L. Jones;O. Fèvre;D. Maccagni;A. Mazure;D. Proust;H. Röttgering;G. Trinchieri
我们提出了一个样本的29个星系团从XMM-LSS调查超过一个区域的一些5deg 2的红移z=1.05。样品集群，这代表了在该地区确定的X射线集群的一半左右，遵循明确定义的X射线选择标准，并通过光谱确认。对于所有的星系团，我们提供了X射线光度和温度以及质量。团簇分布在z=0.3和T =1.5 keV附近达到峰值，一半的物体是温度低于2 keV的组。我们的L-T（z）关系指向自相似进化，但并不排除其他物理上合理的模型。假设集群标度律遵循自相似演化，我们的数密度估计z=1是兼容的和谐宇宙学的预测和以前的ROSAT调查的结果。我们监测良好的选择功能，使我们能够证明，包括选择效应是必不可少的正确确定的演变的L-T关系，这可以解释矛盾的结果，从以前的研究。广泛的模拟表明，将调查区域扩展到10 deg 2有可能排除非演化假设，但对更精细的ICM模型的约束可能会受到L-T关系的大的固有色散的限制。我们进一步证明，在标度律中增加分散增加了可检测的集群的数量，因此在集群数量计数的宇宙学解释中产生进一步的简并[除了sigma 8，Omega_m，L（M，z）和T（M，z）]。我们提供了有用的经验公式的集群质量流量和质量计数率的关系，以及XMM-LSS质量灵敏度和即将到来的SZ调查之间的比较。
We present a sample of 29 galaxy clusters from the XMM-LSS survey over an area of some 5deg2 out to a redshift of z=1.05. The sample clusters, which represent about half of the X-ray clusters identified in the region, follow well defined X-ray selection criteria and are all spectroscopically confirmed. For all clusters, we provide X-ray luminosities and temperatures as well as masses. The cluster distribution peaks around z=0.3 and T =1.5 keV, half of the objects being groups with a temperature below 2 keV. Our L-T(z) relation points toward self-similar evolution, but does not exclude other physically plausible models. Assuming that cluster scaling laws follow self-similar evolution, our number density estimates up to z=1 are compatible with the predictions of the concordance cosmology and with the findings of previous ROSAT surveys. Our well monitored selection function allowed us to demonstrate that the inclusion of selection effects is essential for the correct determination of the evolution of the L-T relation, which may explain the contradictory results from previous studies. Extensive simulations show that extending the survey area to 10deg2 has the potential to exclude the non-evolution hypothesis, but that constraints on more refined ICM models will probably be limited by the large intrinsic dispersion of the L-T relation. We further demonstrate that increasing the dispersion in the scaling laws increases the number of detectable clusters, hence generating further degeneracy [in addition to sigma8, Omega_m, L(M,z) and T(M,z)] in the cosmological interpretation of the cluster number counts. We provide useful empirical formulae for the cluster mass-flux and mass-count-rate relations as well as a comparison between the XMM-LSS mass sensitivity and that of forthcoming SZ surveys.
APEX-SZ SunyaevâZelâdovich 星系团巡天
影响因子：
6
作者：
Schwan
通讯作者：
Schwan