Table 8: Comparison of ionic abundances.

Ion		 N(Xi+)/N(Hi+) ORL/CEL
  CEL ORL  

C2+		 3.85 $\times$ 10-4 5.54 $\times$ 10-4 1.4
C3+ 4.18 $\times$ 10-4 3.87 $\times$ 10-4 0.9
N2+ 5.95 $\times$ 10-5 1.03 $\times$ 10-4 1.7
N3+ 4.85 $\times$ 10-5 2.56 $\times$ 10-5 0.5
N4+ 1.46 $\times$ 10-5 1.68 $\times$ 10-5 1.2
O2+ 3.06 $\times$ 10-4 3.95 $\times$ 10-4 1.3
O3+ 6.63 $\times$ 10-5 4.04 $\times$ 10-5 0.6
Ne2+ 5.35 $\times$ 10-5 8.63 $\times$ 10-5 1.6

Source LaTeX | All tables | In the text

Article Contents
1 Introduction
2 Observations
3 Raman scattering features
4 Reddening summary
5 Physical conditions
6 Elemental abundances
7 The central star
8 Summary
References
Online Material
Appendix A: Emission from heavy elements (Z>30)
Appendix B: Atomic data references
List of tables
List of figures