Open Access
Table 1.
Definition of spectral indices used in the present work. Wavelengths are quoted in the air system. All indices are in units of Å.
| Index | Blue Pseudo-continuum | Central passband | Red Pseudo-continuum | Reference |
|---|---|---|---|---|
| [Å] | [Å] | [Å] | ||
| (1) | (2) | (3) | (4) | (5) |
| MgI2.10 | 21 000–21 040 | 21 040–21 110 | 21 110–21 150 | Ivanov et al. (2004) |
| MgI2.28 | 22 710–22 745 | 22 775–22 845 | 22 850–22 874 | Silva et al. (2008), this work |
| FeI2.23 | 22 133–22 185 | 22 240–22 299 | 22 315–22 350 | Silva et al. (2008), this work |
| FeI2.24 | 22 315–22 350 | 22 360–22 480 | 22 500–22 545 | EVL21 |
| NaI2.21 | 22 012–22 039 | 22 041–22 099 | 22 100–22 156 | LB17 |
| CaI2.26 | 22 500–22 545 | 22 590–22 680 | 22 715–22 765 | EVL21 |
| CO2.30 | 22 850–22 895 | 22 915–23 015 | 23 090–23 170 | EVL21 |
| CO2.32 | 23 090–23 170 | 23 190–23 300 | 23 340–23 425 | EVL21 |
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.