To, C, Krause, E, Rozo, E, Wu, H, Gruen, D, Wechsler, R H, Eifler, T F, Rykoff, E S, Costanzi, M, Becker, M R, Bernstein, G M, Blazek, J, Bocquet, S, Bhargava, S, Romer, A K, DES Collaboration, and others, (2021) Dark Energy Survey year 1 results: cosmological constraints from cluster abundances, weak lensing, and galaxy correlations. Physical Review Letters, 126 (14). a141301. ISSN 0031-9007

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Abstract

We present the first joint analysis of cluster abundances and auto or cross-correlations of three cosmic tracer fields: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness. From a joint analysis (4×2pt+N) of cluster abundances, three cluster cross-correlations, and the auto correlations of the galaxy density measured from the first year data of the Dark Energy Survey, we obtain ωm=0.305-0.038+0.055 and σ8=0.783-0.054+0.064. This result is consistent with constraints from the DES-Y1 galaxy clustering and weak lensing two-point correlation functions for the flat νΛCDM model. Consequently, we combine cluster abundances and all two-point correlations from across all three cosmic tracer fields (6×2pt+N) and find improved constraints on cosmological parameters as well as on the cluster observable-mass scaling relation. This analysis is an important advance in both optical cluster cosmology and multiprobe analyses of upcoming wide imaging surveys.

Item Type:	Article
Keywords:	DES Collaboration
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor:	Mx Elements Account
Depositing User:	Mx Elements Account
Date Deposited:	31 Aug 2021 08:36
Last Modified:	31 Aug 2021 10:15
URI:	http://sro.sussex.ac.uk/id/eprint/101353

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