Table 4.
Predicted constraints on cosmological parameters from Euclid.
| Model | Ωb, 0 | Ωm, 0 | ns | h | σ8 | ΩDE, 0 | w0 | wa | γ |
|---|---|---|---|---|---|---|---|---|---|
| Euclid pessimistic | |||||||||
| Flat ΛCDM | 0.025 | 0.0065 | 0.0052 | 0.0036 | 0.0031 | … | … | … | … |
| Non-flat ΛCDM | 0.026 | 0.0065 | 0.0054 | 0.0042 | 0.0032 | 0.0099 | … | … | … |
| Flat w0waCDM | 0.031 | 0.011 | 0.0056 | 0.0046 | 0.0045 | … | 0.038 | 0.14 | … |
| Non-flat w0waCDM | 0.031 | 0.011 | 0.0056 | 0.0047 | 0.0047 | 0.025 | 0.039 | 0.22 | … |
| Flat w0waγCDM | 0.038 | 0.015 | 0.0059 | 0.0047 | 0.0050 | … | 0.039 | 0.14 | 0.015 |
| Non-flat w0waγCDM | 0.038 | 0.015 | 0.0059 | 0.0047 | 0.0055 | 0.025 | 0.039 | 0.23 | 0.016 |
| Euclid optimistic | |||||||||
| Flat ΛCDM | 0.011 | 0.0025 | 0.0015 | 0.0011 | 0.0012 | … | … | … | … |
| Non-flat ΛCDM | 0.011 | 0.0031 | 0.0018 | 0.0014 | 0.0012 | 0.0064 | … | … | … |
| Flat w0waCDM | 0.013 | 0.0053 | 0.0019 | 0.0014 | 0.0019 | … | 0.021 | 0.073 | … |
| Non-flat w0waCDM | 0.013 | 0.0053 | 0.0019 | 0.0015 | 0.0020 | 0.011 | 0.021 | 0.086 | … |
| Flat w0waγCDM | 0.017 | 0.0083 | 0.0022 | 0.0016 | 0.0024 | … | 0.021 | 0.073 | 0.0077 |
| Non-flat w0waγCDM | 0.018 | 0.0085 | 0.0022 | 0.0016 | 0.0027 | 0.011 | 0.021 | 0.092 | 0.0086 |
Notes. We report here the predicted constraints on cosmological parameters from the joint analysis of all Euclid probes (GCs+WL+GCp+GCp×WL), expressed as the ratio of marginalised 1σ uncertainties over their corresponding fiducial values (cf. Table 1). We note that for wa, whose fiducial value is 0, we directly quote the 1σ uncertainties. Because Euclid observables alone cannot constrain τ, it is absent from this table. Values shown here are not exactly identical to (but within an acceptable range of) the same quantities reported in EC20, due to small numerical differences between the codes used.
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