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Matched filter optimization of kSZ measurements with a reconstructed cosmological flow field
Li, Ming1,2; Angulo, R. E.3; White, S. D. M.2; Jasche, J.4
2014-09-21
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume443Issue:3Pages:2311-2326
AbstractWe develop and test a new statistical method to measure the kinematic Sunyaev-Zel'dovich (kSZ) effect. A sample of independently detected clusters is combined with the cosmic flow field predicted from a galaxy redshift survey in order to derive a matched filter that optimally weights the kSZ signal for the sample as a whole given the noise involved in the problem. We apply this formalism to realistic mock microwave skies based on cosmological N-body simulations, and demonstrate its robustness and performance. In particular, we carefully assess the various sources of uncertainty, cosmic microwave background primary fluctuations, instrumental noise, uncertainties in the determination of the velocity field, and effects introduced by miscentring of clusters and by uncertainties of the mass-observable relation (normalization and scatter). We show that available data (Planck maps and the MaxBCG catalogue) should deliver a 7.7 sigma detection of the kSZ. A similar cluster catalogue with broader sky coverage should increase the detection significance to similar to 13 sigma. We point out that such measurements could be binned in order to study the properties of the cosmic gas and velocity fields, or combined into a single measurement to constrain cosmological parameters or deviations of the law of gravity from General Relativity.
KeywordMethods: Statistical Cosmic Background Radiation Cosmology: Theory Large-scale Structure Of Universe
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stu1224
WOS KeywordDIGITAL SKY SURVEY ; LARGE-SCALE STRUCTURE ; SOUTH-POLE TELESCOPE ; SZ CLUSTER SURVEYS ; BULK FLOW ; GALAXY CLUSTERS ; DATA RELEASE ; DARK-MATTER ; PECULIAR VELOCITIES ; STRUCTURE INFERENCE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000342920400030
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10593
Collection空间目标与碎片观测研究基地
Affiliation1.Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Max Planck Inst Astrophys, D-85740 Garching, Germany
3.Ctr Estudios Fis Cosmos Aragon, Teruel 44001, Spain
4.Univ Paris 06, IAP, UMR 7095, CNRS, F-75014 Paris, France
Recommended Citation
GB/T 7714
Li, Ming,Angulo, R. E.,White, S. D. M.,et al. Matched filter optimization of kSZ measurements with a reconstructed cosmological flow field[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,443(3):2311-2326.
APA Li, Ming,Angulo, R. E.,White, S. D. M.,&Jasche, J..(2014).Matched filter optimization of kSZ measurements with a reconstructed cosmological flow field.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,443(3),2311-2326.
MLA Li, Ming,et al."Matched filter optimization of kSZ measurements with a reconstructed cosmological flow field".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 443.3(2014):2311-2326.
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