文章基本信息

标题：Dust in galaxy clusters: Modeling at millimeter wavelengths and impact on Planck cluster cosmology
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作者：J.-B. Melin ; J. G. Bartlett ; Z.-Y. Cai 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2018
卷号：617
DOI：10.1051/0004-6361/201732292
语种：English
出版社：EDP Sciences
摘要：We have examined dust emission in galaxy clusters at millimeter wavelengths using thePlanck857 GHz map to constrain the model based onHerschelobservations that was used in studies for the Cosmic ORigins Explorer (CORE) mission concept. By stacking the emission fromPlanck-detected clusters, we estimated the normalization of the infrared luminosity versus mass relation and constrained the spatial profile of the dust emission. We used this newly constrained model to simulate clusters that we inject intoPlanckfrequency maps. The comparison between clusters extracted using these gas+dust simulations and the basic gas-only simulations allows us to assess the impact of cluster dust emission onPlanckresults. In particular, we determined the impact on cluster parameter recovery (size, flux) and onPlanckcluster cosmology results (survey completeness, determination of cosmological parameters). We show that dust emission has a negligible effect on the recovery of individual cluster parameters for thePlanckmission, but that it impacts the cluster catalog completeness, reducing the number of detections in the redshift range [0.3–0.8] by up to ∼9%. Correcting for this incompleteness in the cosmological analysis has a negligible effect on cosmological parameter measurements: in particular, it does not ease the tension betweenPlanckcluster and primary cosmic microwave background cosmologies.
关键词：enlarge-scale structure of Universegalaxies: clusters: generalcosmic background radiationmethods: data analysismethods: statistical