To, CH;
Krause, E;
Chang, C;
Wu, HY;
Wechsler, RH;
Rozo, E;
Weinberg, DH;
... Weller, J; + view all
(2025)
Dark energy survey: Modeling strategy for multiprobe cluster cosmology and validation for the full six-year dataset.
Physical Review D
, 112
(6)
, Article 063537. 10.1103/ynqj-6hsb.
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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 ± 3 × 2 pt 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, (i) identification of modeling and parametrization choices and impact studies using simulated analyses with each possible model misspecification and (ii) 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 ± 3 × 2 pt 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 ± 3 × 2 pt ± BAO ± SN (combination of CL ± 3 × 2 pt with the previously published Y6 DES baryonic acoustic oscillation and Y5 supernovae data).
| Type: | Article |
|---|---|
| Title: | Dark energy survey: Modeling strategy for multiprobe cluster cosmology and validation for the full six-year dataset |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/ynqj-6hsb |
| Publisher version: | https://doi.org/10.1103/ynqj-6hsb |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10217846 |
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