Cosmology with wide-field SZ cluster surveys: Selection and systematic effects

被引：0
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作者：
Juin, J.B. [1 ,2 ]
Yvon, D. [1 ]
Réfrégier, A. [1 ]
Yéche, C. [1 ]
机构：
[1] CEA/DSM/DAPNIA, CE Saclay, Bât. 141, 91191 Gif-sur-Yvette Cedex, France
[2] Universidad de Concepción, Astronomy Group, Casilla 160-c, Concepción, Chile
来源：
Astronomy and Astrophysics | 2007年 / 465卷 / 01期
关键词：
The cosmological potential of large-scale structure observations for cosmology have been extensively discussed in the litterature. In particular; it has recently been shown how Sunyaev-Zel'dovich (SZ) cluster surveys can be used to constrain dark energy parameters. In this paper; we study whether selection and systematics effects will limit future wide-field SZ surveys from achieving their cosmological potential. For this purpose; we use a sky simulation and an SZ-cluster detection software presented in Pires et al. (2006; A&A; 455; 741); using the future Olimpo survey as a concrete example. We show that the SZ-cluster selection function and contamination of SZ-cluster catalogues are more complex than is usually assumed. In particular; the simulated field-to-field detected cluster counts variance can be a factor 3 larger than the expected Poisson fluctuations. We also study the impact of missing redshift information and of the uncertainty of the scaling relations for low mass clusters. We quantify; through hypothesis tests; how near-future SZ experiments can be used to discriminate between different structure formation models. Using a maximum likelihood approach; we then study the impact of these systematics on the joint measurement of cosmological models and of cluster scaling relations. © ESO 2007;
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页码：57 / 65
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