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Table 5
Metallicity estimates for NGC 6528 from the literature.
| Method | [Fe/H] | Ref. | |
| dex | |||
|
|
|||
| IR abs. at 1.6 μm | –0.23 | 1 | |
| Low resolution spectra | –0.50 ± 0.3 | 2 | |
| High resolution spectra (RHBs) | 0.07 ± 0.01 | 3 | |
| RGB morphology indicators | ~–0.2 | 4 | |
| High resolution spectra (RGs) | –0.10 ± 0.20 | 5 | |
| High resolution infrared spectra | –0.17 ± 0.01 | 6 | |
| Photometric calibration | –0.04 ± 0.27 | 7 | |
Reference. Numbers in the last column indicate the reference: 1) Origlia et al. (1997); 2) Coelho et al. (2001); 3) Carretta et al. (2001); 4) Momany et al. (2003); 5) Zoccali et al. (2004); 6) Origlia et al. (2005); 7) Calamida et al. (2014).
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