Dark Energy Survey: Modeling strategy for multiprobe cluster cosmology and validation for the Full Six-year Dataset
Abstract
We introduce an updated To&Krause2021 model for joint analyses of cluster abundances and large-scale two-point correlations of weak lensing and galaxy and cluster clustering (termed CL+3x2pt analysis) and validate that this model meets the systematic accuracy requirements of analyses with the statistical precision of the final Dark Energy Survey (DES) Year 6 (Y6) dataset. The validation program consists of two distinct approaches, (1) identification of modeling and parameterization choices and impact studies using simulated analyses with each possible model misspecification (2) end-to-end validation using mock catalogs from customized Cardinal simulations that incorporate realistic galaxy populations and DES-Y6-specific galaxy and cluster selection and photometric redshift modeling, which are the key observational systematics. In combination, these validation tests indicate that the model presented here meets the accuracy requirements of DES-Y6 for CL+3x2pt based on a large list of tests for known systematics. In addition, we also validate that the model is sufficient for several other data combinations: the CL+GC subset of this data vector (excluding galaxy--galaxy lensing and cosmic shear two-point statistics) and the CL+3x2pt+BAO+SN (combination of CL+3x2pt with the previously published Y6 DES baryonic acoustic oscillation and Y5 supernovae data).
Keywords
Cite
@article{arxiv.2503.13631,
title = {Dark Energy Survey: Modeling strategy for multiprobe cluster cosmology and validation for the Full Six-year Dataset},
author = {Chun-Hao To and Elisabeth Krause and Chihway Chang and Hao-Yi Wu and Risa H. Wechsler and Eduardo Rozo and David H. Weinberg and D. Anbajagane and S. Avila and J. Blazek and S. Bocquet and M. Costanzi and J. De Vicente and J. Elvin-Poole and A. Ferté and S. Grandis and J. Muir and A. Porredon and S. Samuroff and E. Sanchez and D. Sanchez Cid and I. Sevilla-Noarbe and N. Weaverdyck and T. M. C. Abbott and M. Aguena and F. Andrade-Oliveira and D. Bacon and M. R. Becker and D. Brooks and A. Carnero Rosell and J. Carretero and A. Choi and L. N. da Costa and M. E. S. Pereira and T. M. Davis and S. Desai and P. Doel and S. Everett and J. Frieman and J. García-Bellido and M. Gatti and E. Gaztanaga and G. Giannini and D. Gruen and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and T. Jeltema and K. Kuehn and S. Lee and J. L. Marshall and J. Mena-Fern and R. Miquel and J. J. Mohr and J. Myles and A. Palmese and A. A. Plazas Malagón and A. K. Romer and T. Shin and M. Smith and E. Suchyta and G. Tarle and V. Vikram and A. R. Walker and J. Weller},
journal= {arXiv preprint arXiv:2503.13631},
year = {2025}
}
Comments
28 pages, to be submitted, comments welcome