Exploring cosmic origins with CORE : Cluster science

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dc.contributor.author CORE Collaboration
dc.contributor.author Melin, J. -B.
dc.contributor.author Kiiveri, K.
dc.contributor.author Kurki-Suonio, H.
dc.contributor.author Lindholm, V.
dc.contributor.author Väliviita, J.
dc.date.accessioned 2020-01-28T08:30:03Z
dc.date.available 2020-01-28T08:30:03Z
dc.date.issued 2018-04
dc.identifier.citation CORE Collaboration , Melin , J -B , Kiiveri , K , Kurki-Suonio , H , Lindholm , V & Väliviita , J 2018 , ' Exploring cosmic origins with CORE : Cluster science ' , Journal of Cosmology and Astroparticle Physics , no. 4 , 019 . https://doi.org/10.1088/1475-7516/2018/04/019
dc.identifier.other PURE: 106003769
dc.identifier.other PURE UUID: 6e9d863c-1eb9-43d8-821b-9e25c6efaa01
dc.identifier.other WOS: 000429359700007
dc.identifier.other Scopus: 85047567724
dc.identifier.other ORCID: /0000-0002-4618-3063/work/44472916
dc.identifier.other ORCID: /0000-0003-2317-5471/work/44473595
dc.identifier.other ORCID: /0000-0002-3711-3346/work/44473615
dc.identifier.other ORCID: /0000-0001-6225-3693/work/44473713
dc.identifier.uri http://hdl.handle.net/10138/310468
dc.description.abstract We examine the cosmological constraints that can be achieved with a galaxy cluster survey with the future CORE space mission. Using realistic simulations of the millimeter sky, produced with the latest version of the Planck Sky Model, we characterize the CORE cluster catalogues as a function of the main mission performance parameters. We pay particular attention to telescope size, key to improved angular resolution, and discuss the comparison and the complementarity of CORE with ambitious future ground-based CMB experiments that could be deployed in the next decade. A possible CORE mission concept with a 150 cm diameter primary mirror can detect of the order of 50,000 clusters through the thermal Sunyaev-Zeldovich effect (SZE). The total yield increases (decreases) by 25% when increasing (decreasing) the mirror diameter by 30 cm. The 150 cm telescope configuration will detect the most massive clusters (> 10(14) M-circle dot) at redshift z > 1.5 over the whole sky, although the exact number above this redshift is tied to the uncertain evolution of the cluster SZE flux-mass relation; assuming self-similar evolution, CORE will detect similar to 500 clusters at redshift z > 1.5. This changes to 800 (200) when increasing (decreasing) the mirror size by 30 cm. CORE will be able to measure individual cluster halo masses through lensing of the cosmic microwave background anisotropies with a 1-sigma sensitivity of 4 x 10(14)M(circle dot), for a 120 cm aperture telescope, and 10(14)M(circle dot) for a 180 cm one. From the ground, we estimate that, for example, a survey with about 150,000 detectors at the focus of 350 cm telescopes observing 65% of the sky would be shallower than CORE and detect about 11,000 clusters, while a survey with the same number of detectors observing 25% of sky with a 10 m telescope is expected to be deeper and to detect about 70,000 clusters. When combined with the latter, CORE would reach a limiting mass of M-500 similar to 2-3 x 10(13)M(circle dot) and detect 220,000 clusters (5 sigma detection limit). Cosmological constraints from CORE cluster counts alone are competitive with other scheduled large scale structure surveys in the 2020's for measuring the dark energy equation of-state parameters w(0) and w(a) (sigma(w0) = 0.28, sigma(wa) = 0.31). In combination with primary CMB constraints, CORE cluster counts can further reduce these error bars on w(0) and w(a) to 0.05 and 0.13 respectively, and constrain the sum of the neutrino masses, Sigma m(nu), to 39 meV (1 sigma). The wide frequency coverage of CORE, 60-600 GHz, will enable measurement of the relativistic thermal SZE by stacking clusters. Contamination by dust emission from the clusters, however, makes constraining the temperature of the intracluster medium difficult. The kinetic SZE pairwise momentum will be extracted with S/N = 70 in the foreground cleaned CMB map. Measurements of T-CMB (z) using CORE clusters will establish competitive constraints on the evolution of the CMB temperature: (1 + z)(1-beta), with an uncertainty of sigma(beta) less than or similar to 2.7 x 10(-3) at low redshift (z less than or similar to 1). The wide frequency coverage also enables clean extraction of a map of the diffuse SZE signal over the sky, substantially reducing contamination by foregrounds compared to the Planck SZE map extraction. Our analysis of the one-dimensional distribution of Compton-y values in the simulated map finds an order of magnitude improvement in constraints on sigma(8) over the Planck result, demonstrating the potential of this cosmological probe with CORE. en
dc.format.extent 41
dc.language.iso eng
dc.relation.ispartof Journal of Cosmology and Astroparticle Physics
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject CMBR experiments
dc.subject Sunyaev-Zeldovich effect
dc.subject cluster counts
dc.subject galaxy clusters
dc.subject MICROWAVE BACKGROUND COMPTONIZATION
dc.subject MASSIVE GALAXY CLUSTERS
dc.subject SUNYAEV-ZELDOVICH MAPS
dc.subject WEAK-LENSING MASSES
dc.subject RELATIVISTIC CORRECTIONS
dc.subject COSMOLOGICAL PARAMETERS
dc.subject HOT GAS
dc.subject TEMPERATURE
dc.subject EVOLUTION
dc.subject RADIATION
dc.subject 115 Astronomy, Space science
dc.title Exploring cosmic origins with CORE : Cluster science en
dc.type Article
dc.contributor.organization Helsinki Institute of Physics
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1088/1475-7516/2018/04/019
dc.relation.issn 1475-7516
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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