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Cosmology with Galaxy Clusters
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Cosmology with Galaxy Clusters
abstract
We review recent advancements in cosmology with galaxy clusters. Galaxy clusters are the most massive objects in the Universe. Consequently the cluster number density as a function of cluster mass, or cluster abundance, is sensitive to cosmological parameters, particularly the matter density of the Universe $\Omega_{\rm m}$ and the amplitude of matter density fluctuation $\sigma_8$. In this review, we describe the methods used to detect galaxy clusters through optical near-infrared (O-NIR), X-ray, and CMB observations, outlining the advantages and disadvantages of cluster detection through different wavelengths. We describe methods for measuring cluster mass, with a particular focus on calibration by WL measurements. We then discuss how the connection between observables in different wavelengths and cluster abundance can be modeled through a cluster selection function and MOR, and quantify the impact of marginalization of nuisance parameters on cosmological constraints. Finally, we also walk through the recent results of cosmological constraints by cluster abundance with the O-NIR, X-ray, and CMB observations.
Forward citations
Cited by 8 Pith papers
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A Consistent Comparison of Intracluster Light Assembly in Simulations I. Redshift Evolution and Progenitor Galaxies
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Cosmology-dependent covariance in galaxy cluster number counts: consequences for parameter inference
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CHEX-MATE: AMALGAM weak-lensing analysis of 41 Planck Sunyaev-Zel'dovich-selected galaxy clusters
Weak-lensing analysis of 41 SZ clusters yields c200=3.53±0.71 at 10^15 Msun z=0.25 and MSZ/M500=0.83±0.09 with 8% systematic uncertainty and intrinsic scatters.
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Cluster Infall for Mass Calibration in the Stage-IV Era
A calibrated model of infalling galaxy velocities on r ≥ 5 h⁻¹ Mpc forecasts that DESI can constrain cluster masses at sub-percent precision, competitive with Stage-IV weak lensing.
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Weak-Lensing Analysis of the Galaxy Cluster Abell 85: Constraints on the Merger Scenarios of Its Southern Subcluster
Weak-lensing analysis of Abell 85 resolves three substructures and finds a ~2:1 mass ratio between the main cluster and southern subcluster, indicating a major ongoing merger.
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A MINOT-based Study of Gamma-ray emission from SPT-CL J2012-5649/Abell 3667
MINOT modeling of Abell 3667 predicts a hadronic 1–300 GeV flux of ~1.15e-10 cm^-2 s^-1 at 3.7 R500, matching Fermi-LAT, with ~76% of flux outside R500 and IC subdominant by ~20.
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ComPACT: Mass-Redshift Properties of the galaxy cluster catalogue
ComPACT is a new SZ-selected galaxy cluster catalogue from CNN analysis of ACT+Planck data with 2,962 candidates, ~60% confirmation, 116 new redshifts, 158 new masses, and five new massive clusters at z>0.7 that incre...
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A MINOT-based Study of Gamma-ray emission from SPT-CL J2012-5649/Abell 3667
MINOT modeling of Abell 3667 predicts hadronic gamma-ray flux roughly matching Fermi-LAT observations in the 1-300 GeV band but with a spectral index in tension with the data.
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