Open Access
Table 1
Observed metallicity distribution function for stars in the halo field of NGC 5128.
| log (Z/Z⊙) | N | N RGB | log (Z/Z⊙) | N | N RGB |
|
|
|||||
| –2.05 | 0 | 0 | –0.65 | 101 | 76.0 |
| –1.95 | 3 | 1.9 | –0.55 | 122 | 93.0 |
| –1.85 | 1 | 0.6 | –0.45 | 188 | 145.1 |
| –1.75 | 1 | 0.6 | –0.35 | 194 | 151.6 |
| –1.65 | 2 | 1.3 | –0.25 | 247 | 195.5 |
| –1.55 | 3 | 2.0 | –0.15 | 237 | 189.9 |
| –1.45 | 10 | 6.7 | –0.05 | 225 | 182.5 |
| –1.35 | 37 | 25.3 | 0.05 | 218 | 179.0 |
| –1.25 | 23 | 16.0 | 0.15 | 111 | 92.2 |
| –1.15 | 38 | 26.7 | 0.25 | 35 | 29.4 |
| –1.05 | 48 | 34.2 | 0.35 | 8 | 6.8 |
| –0.95 | 46 | 33.3 | 0.45 | 1 | 0.9 |
| –0.85 | 59 | 43.2 | 0.55 | 3 | 2.6 |
| –0.75 | 97 | 72.0 | 0.65 | 0 | 0 |
Notes. The second column lists the total number of stars in each metallicity bin, while the third column gives the number of first ascent red giants in each metallicity bin, after the correction for the AGB contribution.
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