Table 1
Initial abundances and star formation parameters of models that best fit the abundance ratios of the sample stars as a function of age.
| Model A | Model B | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Group | Element | [X/Fe]q | SSFR (M⊙ pc−2) | τMax (Gyr) | σSFR (Gyr) | [X/Fe]q | ∑SFR (M⊙ pc−2) | τMax (Gyr) | σSFR (Gyr) |
| [Mg/Fe] | 0.10 | 29 | 5.8 | 0.6 | 0.085 | 290 | 6.2 | 0.6 | |
| α | [Al/Fe] | 0.13 | 36 | 5.7 | 0.6 | 0.12 | 350 | 6.0 | 0.6 |
| elements | [Si/Fe] | 0.05 | 15 | 5.8 | 0.6 | 0.045 | 200 | 6.0 | 0.6 |
| [Ti/Fe] | 0.065 | 26 | 5.8 | 0.6 | 0.055 | 270 | 6.2 | 0.6 | |
| Fe-peak | [Cu/Fe] | 0.11 | 53 | 5.8 | 0.6 | 0.10 | 450 | 6.2 | 0.6 |
| [Zn/Fe] | 0.07 | 40 | 5.8 | 0.6 | 0.06 | 370 | 6.2 | 0.6 | |
| [Sr/Fe] | −0.05 | 30 | 5.8 | 0.6 | −0.04 | 260 | 5.8 | 0.6 | |
| s-process | [Y/Fe] | −0.075 | 25 | 5.5 | 0.6 | −0.075 | 230 | 5.7 | 0.6 |
| elements | [Ba/Fe] | −0.08 | 17 | 5.8 | 0.6 | −0.075 | 180 | 6.0 | 0.6 |
| [Ce/Fe] | −0.02 | 13 | 5.5 | 0.6 | −0.02 | 160 | 5.7 | 0.6 | |
Notes. Model A assumes a low initial surface density of the gas in the disc (σq = 0.1 M⊙ /pc2) and a star formation of moderate efficiency (tdep = 2 Gyr and fMG = 50%). Model B assumes a moderate initial surface density of the disc (σq = 10 M⊙ /pc2) and a star formation of high efficiency (tdep = 0.7 Gyr and fMG= 100%).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.