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Optical Cluster Cosmology with SDSS redMaPPer clusters and HSC-Y3 lensing measurements

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arxiv 2309.13025 v1 pith:HTEHDXZF submitted 2023-09-22 astro-ph.CO

classification astro-ph.CO
keywords analysisclusterclusterscosmologylensingmodelcatalogclustering
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abstract

We present cosmology results obtained from a blind joint analysis of the abundance, projected clustering, and weak lensing of galaxy clusters measured from the Sloan Digital Sky Survey (SDSS) redMaPPer cluster catalog and the Hyper-Suprime Cam (HSC) Year3 shape catalog. We present a full-forward model for the cluster observables, which includes empirical modeling for the anisotropic boosts on the lensing and clustering signals of optical clusters. We validate our analysis via mock cluster catalogs which include observational systematics, such as the projection effect and the effect of baryonic feedback, and find that our analysis can robustly constrain cosmological parameters in an unbiased manner without any informative priors on our model parameters. The joint analysis of our observables in the context of the flat $\Lambda$CDM model results in cosmological constraints for $S_8\equiv \sigma_8 \sqrt{\Omega_{\rm m} / 0.3}=0.816^{+0.041}_{-0.039}$. Our result is consistent with the $S_8$ inference from other cosmic microwave background- and large scale structure-based cosmology analyses, including the result from the \emph{Planck} 2018 primary CMB analysis.

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Forward citations

Cited by 5 Pith papers

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  4. Synergy between the gravitational potential decay rate and other structure growth probes in testing gravity

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    Joint counts plus weak lensing on DC2 redMaPPer clusters recovers the simulated mass-richness relation within 2 sigma, with photo-z biases reduced by a fitted correction and shear-richness covariance shifting results ...

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