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Table 5
Detection of [Ni II] and [Fe II] in different PN types.
| Category | PNe | [Ni II] & [Fe II] |
|---|---|---|
| PNe with LISs | NGC 3242 | ✓ |
| NGC 6153 | ✓ | |
| NGC 7009 | ✓ | |
| M 1-42 | X | |
| Molecule-Rich PNe | NGC 3132 | ✓ |
| IC 418 | ✓ | |
| NGC 6369 | ✓ | |
| IC 4406 | ✓ | |
| Tc 1 | ✓ | |
| X-ray emission PNe | NGC 3242 | ✓ |
| NGC 6153 | ✓ | |
| NGC 7009 | ✓ | |
| NGC 6369 | ✓ | |
| IC 418 | ✓ | |
| Binary CSPNe | NGC 6153* | ✓ |
| Hf 2-2 | X | |
| NGC 6778 | X | |
| NGC 3132 | ✓ | |
| NGC 6369* | ✓ | |
| IC 4406* | ✓ | |
| Tc 1* | ✓ | |
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