On the ISW-cluster cross-correlation in future surveys

Journal
Date Issued
2019
Author(s)
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DOI
Description
We acknowledge financial contribution from the agreement ASI n.I/023/12/0 ‘Attivit`a relative alla fase B2/C per la missione Euclid’. The support by the ‘ASI/INAF Agreement 2014-024-R.0 for the Planck LFI Activity of Phase E2’ is also acknowledged. MB, DP, FF, and LM acknowledge the support from the grant MIUR PRIN 2015 ‘Cosmology and Fundamental Physics: illuminating the Dark Universe with Euclid’. MB was supported by the South African Radio Astronomy Observatory, which is a facility of the National Research Foundation, an agency of the Department of Science and Technology and the Claude Leon Foundation. BS acknowledges financial support from the University of Trieste through the program ‘Finanziamento di Ateneo per progetti di ricerca scientifica – FRA 2015’, a grant from ’Consorzio per la Fisica – Trieste’ and from the PRIN 2015W7KAWC project, funded by the Italian Minister for University and Research.
Abstract
We investigate the cosmological information contained in the cross-correlation between the integrated Sachs-Wolfe (ISW) of the cosmic microwave background (CMB) anisotropy pattern and galaxy clusters from future wide surveys. Future surveys will provide cluster catalogues with a number of objects comparable with galaxy catalogues currently used for the detection of the ISW signal by cross-correlation with the CMB anisotropy pattern. By computing the angular power spectra of clusters and the corresponding cross-correlation with CMB, we perform a signal-to-noise ratio (SNR) analysis for the ISW detection as expected from the eROSITA and the Euclid space missions. We discuss the dependence of the SNR of the ISW-cluster cross-correlation on the specifications of the catalogues and on the reference cosmology. We forecast that the SNRs for ISW-cluster cross-correlation are slightly smaller compared to those which can be obtained from future galaxy surveys but the signal is expected to be detected at high significance, i.e. more than > 3 σ. We also forecast the joint constraints on parameters of model extensions of the concordance Λ cold dark matter (ΛCDM) cosmology by combining CMB and the ISW-cluster cross-correlation.
Volume
482
Issue
2
Start page
2670
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2019MNRAS.482.2670B
Rights
open.access
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