Applying the empirical abundance method to simulated observations of NGC 3132 from a 3D model overestimates the input oxygen abundance by up to 35% due to line-of-sight projection effects.
Revised Diagnostic Diagrams for Planetary Nebulae
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abstract
Diagnostic diagrams of electron density - excitation for a sample of 613 planetary nebulae are presented. The present extensive sample allows the definition of new statistical limits for the distribution of planetary nebulae in the log [Ha/[SII]] vs log [Ha/[NII]], log [Ha/[SII]] vs [SII] 6717/6731 and log [Ha/[NII]] vs [SII] 6717/6731 planes. The diagrams provide a good representation of the ranges of physical conditions, indicated by these emission line ratios, present in planetary nebulae during different evolutionary stages.
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Dissecting NGC 3132: Tracing the mass-loss history of the southern ring planetary nebula
Applying the empirical abundance method to simulated observations of NGC 3132 from a 3D model overestimates the input oxygen abundance by up to 35% due to line-of-sight projection effects.