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1 Introduction |
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2 Observations and reduction |
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3 Morphology and sizes |
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4 Analysis |
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5 Discussion and conclusions |
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References |
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List of tables |
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List of figures |
| Object | HeI | HeII | OI | OII | OIII | NI | NII | SII | SIII | NeIII | ArIV |
| DdDm 1 | 1.04e-1 | - | - | - | 8.6e-5 | - | - | - | - | 1.5e-5 | - |
| IC 5117 | 9.33e-2 | 1.0e-2 | 5.4e-6 | 1.3e-5 | 2.9e-4 | 1.3e-6 | 5.9e-6 | 1.8e-7 | 2.0e-6 | - | - |
| M 1-71 | 1.17e-1 | - | 1.6e-5 | - | 5.0e-4 | - | 2.1e-5 | 3.4e-7 | 1.8e-6 | 1.5e-4 | - |
| NGC 6833 | 9.05e-2 | - | 1.3e-6 | 4.5e-6 | 1.2e-4 | - | 2.0e-6 | 3.0e-8 | - | 3.4e-5 | 4.7e-8 |