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Table 11
Constraints on the cosmological parameters of the base ΛCDM model with the addition of a varying fine-structure constant.
| Planck+WP | Planck+WP+BAO | WMAP-9 | |
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| Ωbh2 ......... | 0.02206 ± 0.00028 | 0.02220 ± 0.00025 | 0.02309 ± 0.00130 |
| Ωch2 ......... | 0.1174 ± 0.0030 | 0.1161 ± 0.0028 | 0.1148 ± 0.0048 |
| τ ......... | 0.095 ± 0.014 | 0.097 ± 0.014 | 0.089 ± 0.014 |
| H0 ......... | 65.2 ± 1.8 | 66.7 ± 1.1 | 74 ± 11 |
| ns ......... | 0.974 ± 0.012 | 0.975 ± 0.012 | 0.973 ± 0.014 |
| log (1010As) ......... | 3.106 ± 0.029 | 3.100 ± 0.029 | 3.090 ± 0.039 |
| α/α0 ......... | 0.9936 ± 0.0043 | 0.9989 ± 0.0037 | 1.008 ± 0.020 |
Notes. We quote ± 1σ errors. Note that for WMAP there is a strong degeneracy between H0 and α, which is why the error on α/α0 is much larger than for Planck.
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