Table 4
Metallicity estimates for NGC 7492 on the ZW scale and their respective values on the UVES scale and vice versa, as found from the literature search.
| [Fe/H]ZW | [Fe/H]UVES | Reference | Method |
|
|
|||
| –1.68 ± 0.10 | –1.64 ± 0.13c | This work | Fourier light-curve decomposition of the RR Lyrae stars |
| –1.72 ± 0.07 | Saviane et al. (2012) | CaII triplet using the FORS2 imager and spectrograph at the VLT | |
| –1.69 ± 0.08 | Saviane et al. (2012) | CaII triplet using the FORS2 imager and spectrograph at the VLT | |
| –1.69 ± 0.08 | Carretta et al. (2009) | Weighted average of several metallicitiesb | |
| –1.82 ± 0.05 | –1.83 ± 0.07c | Cohen & Melendez (2005) | FeI line in bright red giants in this cluster |
| –1.79 ± 0.06 | –1.79 ± 0.08c | Cohen & Melendez (2005) | FeII line in bright red giants in this cluster |
| –1.70 ± 0.06 | –1.66 ± 0.08c | Rutledge et al. (1997) | Infrared Ca triplet |
| –1.78 | Harris (1996) | Globular cluster cataloguea | |
| –1.5 ± 0.3 | –1.41 ± 0.36c | Zinn & West (1984) | Narrow band Q39 photometric system |
| –1.34 ± 0.25 | –1.23 ± 0.27c | Smith (1984) | ΔS method for two RR Lyraes in the cluster |
Notes.
The catalogue version used is the updated 2010 version available at http://www.physics.mcmaster.ca/Globular.html.
Carretta et al. (2009); Carretta & Gratton (1997); Kraft & Ivans (2003), and the recalibration of the Q39 and W′′ indices.
Converted from Col. 1 using Eq. (7) (Carretta et al. 2009).
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