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Table 10
Distance modulus and physical distance estimates for M 68 in the literature.
| Reference | μ0 [mag] | Distance [kpc] | Method |
|
|
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| This work | 15.00 ± 0.11 | 10.00 ± 0.49 | Fourier decomposition of RR0 light curves |
| This work | 15.00 ± 0.05 | 9.99 ± 0.21 | Fourier decomposition of RR1 light curves |
| This work | 14.97 ± 0.11 | 9.84 ± 0.50 | SX Phe P−L relation |
| This work | 15.00 ± 0.07 | 10.00 ± 0.30 | MV −[Fe/H] relation for cluster RRL stars |
| Rosenberg et al. (1999) | 15.02 | 10.07 | CMD analysis |
| Caloi et al. (1997) | 15.15 | 10.72 | CMD isochrone fitting |
| Brocato et al. (1997) | 15.16 ± 0.10 | 10.76 ± 0.50 | CMD isochrone fitting |
| Gratton et al. (1997) | 15.24 ± 0.08 | 11.17 ± 0.41 | CMD analysis |
| Harris (1996) | 15.06 | 10.3 | Globular cluster catalogue |
| Straniero & Chieffi (1991) | 14.99 ± 0.03 | 9.94 ± 0.14 | CMD isochrone fitting |
| McClure et al. (1987) | 15.03 ± 0.15 | 10.14 ± 0.70 | CMD analysis |
| Alcaino (1977) | 14.97 | 9.8 | Magnitude of the HB |
| Harris (1975) | 14.91 | 9.6 | Mean magnitude of RRL stars |
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