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 cold dark matter (CDM) cosmology by combining CMB and the ISW-cluster cross-correlation.
On the ISW-cluster cross-correlation in future surveys / Ballardini M.; Paoletti D.; Finelli F.; Moscardini L.; Sartoris B.; Valenziano L.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - STAMPA. - 482:2(2019), pp. 2670-2680. [10.1093/mnras/sty2795]
On the ISW-cluster cross-correlation in future surveys
Ballardini M.;Moscardini L.;
2019
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 cold dark matter (CDM) cosmology by combining CMB and the ISW-cluster cross-correlation.File | Dimensione | Formato | |
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