Combination of cluster number counts and two-point correlations: validation on mock Dark Energy Survey. Issue 3 (29th January 2021)

• Record Type: Journal Article
• Authors: To, Chun-Hao; Krause, Elisabeth; Rozo, Eduardo; Wu, Hao-Yi; Gruen, Daniel; DeRose, Joseph; Rykoff, Eli; Wechsler, Risa H; Becker, Matthew; Costanzi, Matteo; Eifler, Tim; da Silva Pereira, Maria Elidaiana; Kokron, Nickolas
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 502:Issue 3(2021)
• Page Start: 4093
• Page End: 4111
• Publication Date: 2021-01-29
• Subjects: cosmological parameters -- cosmology: theory -- large-scale structure of Universe; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stab239
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We present a method of combining cluster abundances and large-scale two-point correlations, namely galaxy clustering, galaxy–cluster cross-correlations, cluster autocorrelations, and cluster lensing. This data vector yields comparable cosmological constraints to traditional analyses that rely on small-scale cluster lensing for mass calibration. We use cosmological survey simulations designed to resemble the Dark Energy Survey Year 1 (DES-Y1) data to validate the analytical covariance matrix and the parameter inferences. The posterior distribution from the analysis of simulations is statistically consistent with the absence of systematic biases detectable at the precision of the DES-Y1 experiment. We compare the χ 2 values in simulations to their expectation and find no significant difference. The robustness of our results against a variety of systematic effects is verified using a simulated likelihood analysis of DES-Y1-like data vectors. This work presents the first-ever end-to-end validation of a cluster abundance cosmological analysis on galaxy catalogue level simulations.