Table 9.
Metallicity term γ and zeropoint offset Δϖ obtained by comparing Gold sample cluster Cepheids to the LMC LL using Eq. (9).
| Band | γ free and Δϖ = 0 | γ and Δϖ free | ||||
|---|---|---|---|---|---|---|
| γ | Δϖ | γ | Δϖ | nMW | ||
| (mag/dex) | (μas) | (mag/dex) | (μas) | |||
| Bp | −0.041 ± 0.098 | 0 | −0.191 ± 0.255 | −18 ± 27 | 23 | |
| V | 0.015 ± 0.090 | 0 | 0.029 ± 0.216 | 2 ± 24 | 22 | |
| G | −0.300 ± 0.102 | 0 | −0.447 ± 0.265 | −18 ± 28 | 23 | |
| Rp | −0.168 ± 0.075 | 0 | −0.187 ± 0.183 | −2 ± 21 | 23 | |
| I | −0.083 ± 0.102 | 0 | −0.150 ± 0.217 | −8 ± 23 | 15 | |
| F160W(a) | −0.259 ± 0.062 | 0 | −0.216 ± 0.142 | 5 ± 15 | 15 | |
| WVI | −0.035 ± 0.098 | 0 | −0.146 ± 0.206 | −14 ± 22 | 15 | |
| WG | −0.394 ± 0.058 | 0 | −0.448 ± 0.141 | −6 ± 15 | 26 | |
 |
−0.287 ± 0.059 | 0 | −0.297 ± 0.134 | −1 ± 14 | 15 | |
Notes. Wesenheit magnitudes of cluster Cepheids, WH, were computed using Eq. (5) using the photometric data for the individual passbands presented by Riess et al. (2022a). Cluster parallaxes were bias corrected using the L21 approach. Superscript (a) indicates that HST WFC-IR CRNL corrections have been applied to account for the 0.9 to 1.8 dex difference in flux among MW cluster Cepheids and LMC Cepheids (mean correction 0.010 mag). The weighted mean and associated uncertainty for ΔϖCl is −4 ± 6 μas.
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