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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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