Table 3.
Posterior mean and standard deviation for the parameters of the CSF flat ΛCDM model from DESI-BAO Y1, CMB, and Pantheon+ data compared with the standard ΛCDM model.
| Parameter | DESI | CMB | DESI+CMB+Pantheon+ | Base-ΛCDM |
|---|---|---|---|---|
| 100Ωbh2 | – | 2.555 ± 0.122 | 2.622 ± 0.081 | 2.248 ± 0.013 |
| Ωch2 | – | 0.135 ± 0.006 | 0.137 ± 0.003 | 0.1186 ± 0.0008 |
| τ | – | 0.0515 ± 0.0076 | 0.0512 ± 0.0073 | 0.058 ± 0.007 |
| ln(1010As) | – | 3.040 ± 0.015 | 3.038 ± 0.015 | 3.049 ± 0.015 |
| ns | – | 0.9675 ± 0.0043 | 0.9696 ± 0.0056 | 0.9685 ± 0.0035 |
| Θdec | – | -0.127 ± 0.046 | −0.148 ± 0.026 | 0 |
| Θ(0.5) | −0.065 ± 0.028 | – | −0.081 ± 0.020 | 0 |
| Θ(1.0) | −0.085 ± 0.041 | – | −0.102 ± 0.032 | 0 |
| Θ(2.5) | −0.084 ± 0.072 | – | −0.094 ± 0.061 | 0 |
| dΘ/dzobs(0.0) | −0.192 ± 0.092 | – | −0.275 ± 0.056 | 0 |
| dΘ/dzobs(2.5) | 0.0202 ± 0.024 | – | 0.016 ± 0.021 | 0 |
| Ha0 | – | 50.25 ± 6.04 | 47.77 ± 3.12 | 67.99 ± 0.39 |
| H0 | – | – | 64.05 ± 3.45 | Ha0 |
| Ωm | 0.655 ± 0.189 | 0.672 ± 0.173 | 0.729 ± 0.111 | 0.3067 ± 0.0051 |
| hard | 77.41 ± 9.20 | 74.01 ± 8.85 | 73.10 ± 5.39 | 100.18 ± 0.66 |
| σ8 | – | 0.667 ± 0.055 | 0.642 ± 0.032 | 0.809 ± 0.006 |
| rd/Mpc | – | 147.27 ± 0.28 | 153.04 ± 6.02 | 147.34 ± 0.21 |
| Age [Gyr] | – | 13.114 ± 0.266 | 13.11 ± 0.13 | 13.78 ± 0.02 |
Notes. Posterior mean and standard deviation for the parameters of CSF flat ΛCDM model. The first column shows the constraints from using only DESI-BAO Y1 measurements, the second column shows the constraints for only CMB, the third column shows the constraints obtained combining DESI-BAO Y1 measurements with CMB and Pantheon+, and the last column shows the constraints from DESI+CMB+Pantheon+ from the standard base ΛCDM model. The parameters above the middle line represent the fundamental parameters of each model (6+6 parameters for the CSF models, and six parameters for the standard model).
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