Table 4
Errors on the abundance determination.
| ∆(Abundance) | ∆ Teff 30 K | ∆ logg 0.05 | ∆vt 0.05 km/s | S/N |  |
∆[C/Fe] | ∆[N/Fe] | σTot |
|---|---|---|---|---|---|---|---|---|
| ∆[C/Fe]MS | 0.04 | 0.01 | 0.00 | 0.05 | 0.06 | – | 0.00 | 0.06 |
| ∆[N/Fe]MS | 0.07 | 0.02 | 0.00 | 0.06 | 0.09 | 0.07 | – | 0.11 |
| ∆[C/Fe]SGB | 0.03 | 0.00 | 0.01 | 0.04 | 0.05 | – | 0.00 | 0.05 |
| ∆[N/Fe]SGB | 0.05 | 0.00 | 0.00 | 0.06 | 0.08 | 0.05 | – | 0.09 |
| ∆[C/Fe]RGB | 0.02 | 0.00 | 0.01 | 0.04 | 0.05 | – | 0.00 | 0.05 |
| ∆[N/Fe]RGB | 0.04 | 0.02 | 0.01 | 0.05 | 0.07 | 0.05 | – | 0.09 |
| ∆[C/Fe]HB | 0.04 | 0.00 | 0.01 | 0.05 | 0.06 | – | 0.00 | 0.06 |
| ∆[N/Fe]HB | 0.06 | 0.01 | 0.01 | 0.07 | 0.09 | 0.05 | – | 0.10 |
| ∆[C/Fe]AGB | 0.02 | 0.00 | 0.02 | 0.04 | 0.05 | – | 0.00 | 0.05 |
| ∆[N/Fe]AGB | 0.03 | 0.01 | 0.01 | 0.05 | 0.06 | 0.05 | – | 0.08 |
Notes. Columns 2–4 indicate the [C/Fe] and [N/Fe] abundance variation due to the variation in temperature, gravity and microturbulence indicated for each parameter. Column 5 shows the error due to the S/N. Column 6 is the total error calculated as the root-square of the sum of the squares of the previous 4 columns, and represents the total error due to the uncertainty on stellar parameters and to the S/N. Column 7 is the [C/Fe] variation due to the uncertainty in [N/Fe] given by column 6, while Column 8 is the [N/Fe] variation due to the uncertainty in [C/Fe] given by Column 6. Finally column 9 gives the total error calculated as the root-square of the sum of the squares of the previous three columns. This is the final error that we uses in the text.
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.