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Table 9

NGC 5128 CND properties.

Projected dimensions (pc) 390 × 195
Velocity width FWHM ΔV   (km   s-1) 375
Surface area filling factor 0.10 ± 0.02a

Mean column densityaNH   (cm-2) (0.3−1.5) × 1023
Gas massb,cMgas   (M) 8.4 × 107
Conversion factordX   ( cm-2/   K   km   s-1) 4 × 1020

CO luminosityeLCO   (L_ ⊙) (3.6−5.0) × 105
C° luminosity LCI   (L_ ⊙ (1.5 ± 0.3) × 105
C+ luminosity LCII   (L_ ⊙ (4.0 ± 0.6) × 106



LVG two-phase and PDR three-phase result; uncertainty 50%.


Uncertainty factor of three; lower limit from LVG assuming all H in H2, upper limit from PDR/XDR modelling assuming no mechanical heating in PDR1.


Assuming a 35% mass contribution by helium.


Uncertainty factor of two.


Sum of all CO transitions up to J = 15–14.

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