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Table 3.
Atomic data for selected X-ray lines of interest, for ions that are expected to be abundant in the warm-hot phase.
| Ion | Transition | Line name | Wavelength (Å) | Osc. strength f | Upper level | Lower level |
|---|---|---|---|---|---|---|
| O VII | 1s2 − 1s2p | Heα | 21.602 | 0.696 | 7 | 1 |
| O VIII | 1s − 2p | Lyα | 18.969 (18.973,18.967) | 0.416 | 3, 4 | 1 |
| Ne IX | 1s2 − 1s2p | Heα | 13.447 | 0.724 | 7 | 1 |
| Ne X | 1s − 2p | Lyα | 12.134 (12.138,12.132) | 0.416 | 3, 4 | 1 |
Notes. Upper and lower levels are used for line identification in the APEC database.
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