Table 11: Ionic concentrations and chemical abundances in NGC 40. Wavelength in Angstrom for all values of $\lambda $ above 1000, otherwise in $\mu $m.
Ion $\lambda $ Intens./H$\beta $ $N_{{\rm ion}}$/ $N_{{\rm p}}$ ICF $N_{{\rm el.}}$/ $N_{{\rm p}}$
He+ 5875 6.5 0.044    
He+ 4471 2.43 0.048    
C+ 2325 75. 8.54(-4)    
C++ 1909 66. 9.33(-4)    
C+3 1548 $\leq$25. $\leq$7.4(-4) 1 1.9(-3)
N+ 6584 283. 1.01(-4)    
N+ 122 1.85 8.6(-5)    
N++ 57 9.83 3.46(-5) 1 1.3(-4)
O+ 3727 380. 5.0(-4)    
O++ 5007 25. 1.9(-5)    
O++ 52 11.6 3.0(-5)    
O+3 25,8 $\leq$0.14 $\leq$5.2(-8) 1 5.3(-4)
Ne+ 12.8 78.6 1.38(-4)    
Ne++ 15.5 1.16 8.4(-7)    
Ne++ 3869 0.34 8.3(-7) 1 1.4(-4)
S+ 6731 14.5 1.48(-6)    
S++ 18.7 34.2 4.09(-6)    
S++ 6312 0.5 2.8(-6) 1 5.6(-6)
Ar+ 6.99 17.4 2.39(-6)    
Ar++ 8.99 9.48 7.2(-7) 1 3.4(-6)
Ar++ 7136 4.6 3.8(-6)    
Cl++ 5538 0.27 7.5(-8)    
Cl++ 5518 0.20 5.9(-8)    
P++ 17.9 2.08 1.2(-7) 2.0: 2.4(-7):
Fe+ 25.9 0.23: 6.2(-8)    
Fe++ 22.93 0.93 3.4(-7) 1.5: 6.1(-7):
Si+ 34.8 4.05 2.0(-6)    
Si++ 1892 2.4 4.9(-6) 1 7.0(-6)
Intensities given with respect to H$\beta $ = 100.

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