Table 1
Planetary nebulae in which the [C I] λ8727 and/or λλ9824, 9850 emission lines have been detected.
| PN name | [C I] λ8727 | [C I] λλ9824,9850 | Refs. |
|---|---|---|---|
| NGC 7027 | ✓ | ✓ | 1,2 |
| NGC 6210 | ✓ | ✓ | 2 |
| NGC 6720 | ✓ | ✓ | 2 |
| NGC 2346 | ✓ | ✓ | 3 |
| NGC 2440 | ✓ | ✓ | 3 |
| NGC 3132 | ✓ | ✓ | 3 |
| IC 4406 | ✓ | ✓ | 3 |
| NGC 6741 | ✓ | ✓ | 4 |
| NGC 7662 | ✓ | – | 5 |
| IRAS 1385-5517 | ✓ | – | 6 |
| NGC 6543 | – | ✓ | 7 |
| IC 5117 | ✓ (††) | ✓(††) | 8 |
| IC 418 | ✓ | ✓ | 9, 17 |
| He 2-138 | ✓ | – | 10 |
| BoBn-1 | ✓ | – | 11 |
| NGC 6369 | ✓ | – | 12 |
| M 1-25 | ✓ | – | 12 |
| M1-30 | ✓ | – | 12 |
| He 2-86 | ✓ | – | 12 |
| M 1-61 | ✓ | – | 12 |
| Cn 1-5 | ✓ | – | 12 |
| Hb 4 | ✓ | – | 12 |
| PC 14 | ✓ | – | 12 |
| Pe 1-1 | ✓ | – | 12 |
| NGC 6302 | ✓ | – | 13 |
| NGC 3918 | ✓ | ✓ | 14 |
| Lin49 | ✓ | ✓ | 15 |
| Hen 3-1357 | ✓ | – | 16 |
| NGC 5315 | ✓ | ✓ | 18 |
| M 1-31 | ✓ | ✓ | 19 |
| M1-33 | ✓ | ✓ | 19 |
| M 1-60 | ✓ | ✓ | 19 |
| M 2-31 | ✓ | ✓ | 19 |
| Hen 2-73 | ✓ | ✓ | 19 |
| Hen 2-96 | ✓ | ✓ | 19 |
| H 1-40 | ✓ | ✓ | 19 |
| H 1-50 | ✓ | ✓ | 19 |
| J 900 | ✓ | – | 20 |
| H 4-1 | ✓?(†) | ✓ | 21 |
Notes. (†)An emission line centered at 8727 Å was detected, but was identified as C II. (††)An 1 Å difference is reported between the λ(obs) and λ(lab). (1) Danziger & Goad (1973); (2) Jewitt et al. (1983); (3) Liu etal. (1995); (4) Hyung & Aller (1997a); (5) Hyung & Aller (1997b); (6) Sivarani et al. (1999); (7) Hyung et al. (2000); (8) Hyung et al. (2001); (9) Sharpee et al. (2004); (10) Williams et al. (2008); (11) Otsuka et al. (2010); (12) García-Rojas et al. (2012); (13) Rauber et al. (2014); (14) García-Rojas et al. (2015); (15) Otsuka et al. (2016); (16) Otsuka et al. (2017); (17) Dopita et al. (2017); (18) Madonna et al. (2017); (19) García-Rojas et al. (2018); (20) Otsuka & Hyung (2019); (21) Otsuka et al. (2023).
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