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Table 5.

Marginalised 1 σ uncertainties on cosmological parameters in ΛCDM + ∑mν, in ΛCDM + ∑mν + Neff, in w0waCDM + ∑mν, and in w0waCDM + ∑mν + ΔNeff.

ΛCDM + ∑mν
Ωm, 0 100 Ωb, 0 h ns σ8 ∑mν [meV]
Euclid-only
GCsp 0.0068 0.37 0.033 0.029 0.0077 < 320
WL+GCph+XCph 0.0032 0.36 0.035 0.017 0.0047 < 260
WL+GCph+XCph+GCsp 0.0026 0.24 0.022 0.013 0.0039 56
WL+GCph+XCph+GCsp+CC 0.0025 0.24 0.022 0.012 0.0037 53
Euclid +CMB
Euclid +Planck 0.0023 0.033 0.0021 0.0022 0.0033 23
Euclid +CMB-S4+LiteBIRD 0.0021 0.024 0.0016 0.0014 0.0028 16
ΛCDM + ∑mν + ΔNeff
Ωm, 0 100 Ωb, 0 h ns σ8 ∑mν [meV] ΔNeff
Euclid-only
WL+GCph+XCph+GCsp 0.0026 0.19 0.023 0.012 0.0039 < 220 < 0.746
Euclid +CMB
Euclid +Planck 0.0022 0.037 0.0028 0.0021 0.0031 25 < 0.144
Euclid +CMB-S4+LiteBIRD 0.0019 0.025 0.0018 0.0016 0.0025 16 < 0.063
w0waCDM + ∑mν
Ωm, 0 100 Ωb, 0 h ns σ8 ∑mν [meV] w0 wa
Euclid-only
WL+GCph+XCph+GCsp 0.0043 0.21 0.019 0.010 0.0055 < 220 0.04 0.13
Euclid +CMB
Euclid +Planck 0.0038 0.053 0.0036 0.0022 0.0048 38 0.04 0.12
Euclid +CMB-S4+LiteBIRD 0.0038 0.051 0.0035 0.0015 0.0043 28 0.04 0.11
w0waCDM + ∑mν + ΔNeff
Ωm, 0 100 Ωb, 0 h ns σ8 ∑mν [meV] ΔNeff w0 wa
Euclid-only
GCsp 0.024 0.52 0.056 0.043 0.022 < 440 < 1.352 0.21 0.59
WL+GCph+XCph 0.0049 0.38 0.065 0.029 0.0065 < 260 < 1.705 0.05 0.18
WL+GCph+XCph+GCsp 0.0043 0.25 0.036 0.016 0.0054 < 220 < 0.935 0.04 0.14
WL+GCph+XCph+GCsp+CC 0.0037 0.21 0.029 0.014 0.0049 < 220 < 0.745 0.03 0.12
Euclid +CMB
Euclid +Planck 0.0036 0.052 0.0036 0.0022 0.0046 40 < 0.149 0.04 0.12
Euclid +CMB-S4+LiteBIRD 0.0038 0.051 0.0035 0.0017 0.0044 31 < 0.069 0.04 0.13

Notes. We show results from Euclid-only observables and in combination with current (Planck) and future (CMB-S4+LiteBIRD) CMB surveys. The label Euclid stands for GCsp+WL+GCph+XCph (all the primary probes from both photometric and spectroscopic data). In the baseline model (ΛCDM + ∑mν) and in the extended model (w0waCDM + ∑mν + ΔNeff) we also tested the combination GCsp+WL+GCph+XCph+CC that includes, besides Euclid primary probes, also Euclid cluster number counts. For the ΔNeff parameter, we always quote the upper bounds at 95% CL. For ∑mν, we quote the 95% upper bounds when the posterior is one-sided.

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