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Table 6
Properties of new PNs.
| Parameters | PN1 | PN2 | PN3 | PN4 |
|
|
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| Morphologya | B or Eb | B | B | R |
| Size [O III] (″) | ... | 16 × 12 | 6.5 | 15 |
| Size Hα (″) | 10 | 23 × 16 | 26 × 9.5 | 18 |
| θ8.0 (″) | 6.4 | 13 | 5.5 | ... |
| E(B − V) | ... | ... | ... | 1.13 ± 0.68 |
| nec (cm-3) | 5400 |
2700 |
400 |
300 |
| DMIR (kpc) | 6.24 ± 3.12 | 4.76 ± 2.38 | 5.56 ± 2.78 | ... |
| Age (yr) | 6600 ± 3300 | 9900 ± 4950 | 10400 ± 5300 | ... |
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