Contents

• 1 Introduction
• 2 Observations and data reduction
• 3 Kinematics
• 4 Nebular empirical analysis
  • 4.1 Plasma diagnostics
  • 4.2 Ionic and total abundances from ORLs
  • 4.3 Ionic and total abundances from CELs
  
  
• 5 Photoionization modelling
  • 5.1 The ionizing spectrum
  • 5.2 The density distribution
  • 5.3 The nebular elemental abundances
  
  
• 6 Model results
  • 6.1 Comparison of the emission-line fluxes
  • 6.2 Ionization and thermal structure
  
  
• 7 Conclusion
• Bibliography