Table 12: Ionic concentrations and chemical abundances in NGC 6153. 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 19.6 0.131    
He+ 4471 6.51 0.128    
He++ 4686 12.8 0.010 1 0.14
C++ 1909 40.1 5.67(-4) 1.2 6.8(-4)
N+ 6584 53.5 1.90(-5)    
N+ 122 $\leq$0.18 $\leq$2(-5)    
N++ 1750 16.: 5.9(-4):    
N++ 57 72.1 4.42(-4) 1.1 4.8(-4)
O+ 3727 28.8 4.40(-5)    
O++ 5007 908. 6.87(-4)    
O++ 52 251. 1.0(-3)    
O+3 25.8 97.3 3.7(-5) 1 8.3(-4)
Ne+ 12.8 11.5 1.95(-5)    
Ne++ 15.5 311. 2.26(-4)    
Ne++ 3869 90.2 2.20(-4)    
Ne+3 2425 8.5 6.10(-5) 1 3.1(-4)
S+ 6731 5.86 6.0(-7)    
S++ 18.7 86.3 1.04(-5)    
S++ 6312 1.42 7.78(-6)    
S+3 10.5 267. 8.54(-6) 1.05 1.9(-5)
Ar+ 6.99 11.4 1.57(-6)    
Ar++ 8.99 53.4 6.09(-6)    
Ar++ 7136 21.9 3.39(-6)    
Ar+3 4740 2.35 1.48(-6) 1 8.5(-6)
Fe++ 22.9 0.42 1.55(-7) 2: 3.1(-7):
Cl++ 5538 0.744 2.1(-7)    
Cl++ 5518 0.581 1.7(-7)    
Cl+3 11.8 4.05 2.7(-7) 1.2 5.6(-7)
Na++ 7.32 1.77 1.6(-6)    
Si+ 34.8 2.8 2.0(-6)    
Si++ 1892 2.7: 5.5(-6) 1.3 9.8(-6)
Intensities given with respect to H$\beta=100$.

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