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Table 2
Age and metallicity gradients.
| NGC 1569 | NGC 4449 | |||
| Age | 3 Gyr | 10 Gyr | 3 Gyr | 10 Gyr |
|
|
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Z ( ) |
0.00281 ± 0.00031 | 0.00137 ± 0.00015 | 0.00370 ± 0.00030 | 0.00178 ± 0.00040 |
| Zgrad(Z/kpc) | 0.00007 ± 0.00007 | 0.00002 ± 0.00004 | 0.00005 ± 0.00033 | 0.00002 ± 0.00015 |
| agegrad(Gyr/kpc) | 0.16 ± 0.19 | 0.45 ± 0.64 | 0.11 ± 0.45 | 0.50 ± 1.50 |
Notes. Metallicity, metallicity gradient (assuming ages of 3 Gyr and 10 Gyr, respectively) and age gradient (assuming constant Z) estimates for each galaxy, based on the observed RGB color (gradient).
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