Table 2.
Summary of the spectral types of CSPNe compiled in our catalogue, grouped by their atmospheric hydrogen abundance.
| H-rich | H-poor | ||||
|---|---|---|---|---|---|
| SpT | Sample | SpT | Sample | SpT | Sample |
| O3-B1 | 133 | cont. | 22 | [WC 4–12] | 68 |
| Of | 31 | hybrid | 3 | [WO 1–4] | 37 |
| Of-WR(H) | 3 | SySt | 11 | [WN] | 8 |
| B2-M9 | 40 | Blue | 50 | [WR] | 10 |
| DA, WD | 14 | EL | 8 | PG 1159 | 17 |
| DAO | 28 | wels | 77 | [WC]-PG 1159 | 2 |
| sdO | 12 | O(He) | 5 | ||
| hgO(H) | 12 | O(C) | 1 | ||
| B[e] | 6 | DO | 4 | ||
| H-rich | 11 | H-poor | 1 | ||
| Total | 290 | Total | 171 | Total | 153 |
Notes. We include confirmed and probable spectral types. Here, we have discarded 6 objects without any specific spectral type. The O3-B1 group include objects classified as O(H), O and OB. [WR] group include the two objects classified as [WN/C] and [WO]-[WC 8].
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