Table 2.
Summary of the distance-scale analysis.
| Scale | σϖc/ϖc | Ncal | Slope | Intercept | ρab | Ncomp | ⟨K⟩ | ⟨σK⟩ |
|---|---|---|---|---|---|---|---|---|
| 1 | < 0.05 | 26 | −0.232 ± 0.010 | −4.075 ± 0.132 | 0.99 | 26 (1) | 0.894 | 0.102 |
| 355 (2) | 0.913 | 0.544 | ||||||
| 2 | < 0.10 | 74 | −0.237 ± 0.005 | −4.14 ± 0.070 | 0.99 | 74 (1) | 0.914 | 0.113 |
| 355 (2) | 0.917 | 0.543 | ||||||
| 3 | < 0.20 | 137 | −0.242 ± 0.004 | −4.20 ± 0.057 | 0.99 | 133 (1) | 0.964 | 0.154 |
| 355 (2) | 0.931 | 0.553 |
Notes. Ncal = number of calibrators; Ncomp = number of PNe used to compute ⟨K⟩ and ⟨σK⟩: in group (1), we used the calibrator sample with the additional requirement of log Mi > −2, and in group (2), we included all PNe with a distance and a parallax determination, and again log Mi > −2.
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