Table 9.
Hubble constant value derived from the comparison between our GDR2 parallax samples and the predicted parallaxes from R16.
| H0 | H0 | |
|---|---|---|
| (km s−1 Mpc−1) | (km s−1 Mpc−1) | |
| FU only | FU + FO | |
| Companions | 72.83 ± 2.10 ± 1.89 | 72.49 ± 2.01 ± 1.88 |
| Clusters | 73.11 ± 2.01 ± 1.90 | 73.00 ± 1.99 ± 1.90 |
| All Cepheids | 72.99 ± 1.89 ± 1.90 | 72.76 ± 1.86 ± 1.89 |
Notes. The first uncertainties are the statistics combined with the systematics, and the second values account for the effect of the GDR2 parallax zero-point. FU = fundamental mode Cepheids; FO = first-overtone mode Cepheids with fundamentalized period.
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