Table 5.
Summary statistics for the forecast of the impact of different halo finders and calibration errors on Euclid cluster counts cosmological constraints on Ωm and σ8.
| Summary statistics | Richness–mass relation priors | Analysis | Synthetic catalogue | Value |
|---|---|---|---|---|
| IOI | 1% | − 1.66 ± 0.01 | ||
| 3% | VELOCIraptor | ROCKSTAR | − 0.77 ± 0.01 | |
| 5% | (Fixed) | − 0.65 ± 0.01 | ||
| 1% | − 1.70 ± 0.02 | |||
| 3% | SUBFIND | ROCKSTAR | − 0.84 ± 0.01 | |
| 5% | (Fixed) | − 0.61 ± 0.01 | ||
| 1% | − 0.90 ± 0.02 | |||
| 3% | AHF | ROCKSTAR | − 0.61 ± 0.01 | |
| 5% | (Fixed) | − 0.47 ± 0.00 | ||
 |
1% | − 0.04 ± 0.05 | ||
| 3% | ROCKSTAR | ROCKSTAR | − 0.06 ± 0.04 | |
| 5% | (marginalised) | −0.01 ± 0.02 | ||
| 1% | −0.09 ± 0.05 | |||
| 3% | VELOCIraptor | VELOCIraptor | − 0.00 ± 0.03 | |
| 5% | (marginalised) | −0.02 ± 0.03 | ||
Notes. The IOI quantifies the tension in the posteriors if one uses the ROCKSTAR calibration to create the synthetic data while either the VELOCIraptor, SUBFIND, or AHF calibration is used for the analysis. The relative difference of the FOM assesses the attenuation of the constraining power of cluster counts if one marginalizes over the HMF parameters assuming the calibration chain as a prior. The latter statistics are presented only for the ROCKSTAR and VELOCIraptor calibrations as VELOCIraptor, SUBFIND, and AHF use half the simulations used for the ROCKSTAR calibration and present very similar results. Errors for both statistics were estimated using bootstrap resampling.
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