Open Access
Table 1.
Glossary of acronyms and specific terms.
| Term | Definition/description |
|---|---|
| Age (Z) bins | Difference in age (Z) between consecutive age (Z) seed points |
| Age (Z) seed points | Array of age (Z) values that define a typical ‘size’ of the SSPs reflecting the varying age (Z) |
| resolution across the whole age (Z) interval | |
| Bundle | Regions of the CMD containing the stars that are used for the CMD fitting. The bundle(s) are divided in |
| colour-magnitude boxes (or pixels) where the stars (real and synthetic) are counted | |
| deSFH | Mass, per unit time and metallicity, that has been transformed into stars somewhere in the galaxy to |
| account for the stars that are today in the studied volume | |
| deSFR(t) | Marginalisation over metallicity of the deSFH. It gives the mass per unit time that has been transformed |
| into stars somewhere in the Galaxy to account for the stars that are today in the studied volume | |
| MDFM | Metallicity distribution function of the mass transformed into stars |
| MDFS | Metallicity distribution function of the stars currently populating the studied volume |
| Model CMD | CMD resulting from an arbitrary linear combination of SSPs |
| Mother CMD | Specific type of synthetic CMD computed assuming that stars are born with a constant probability for |
| all ages and metallicities within a given age and metallicity range and adopting other stellar population | |
| characteristics such as an initial mass function (IMF) and a parametrisation of the binary star population. | |
| Observational errors and completeness are simulated in it. The SSPs are derived from a mother CMD | |
| Solution CMD | CMD obtained with the best fit SFH, and matching the number of stars of the observed CMD inside the |
| bundle | |
| SSP | Simple Stellar Population, population of synthetic stars in a small range of age and metallicity |
| Synthetic CMD | Any CMD obtained from the predictions of stellar evolution models |
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