**Table 4:** Ionic concentrations and chemical abundances in NGC 6886. Wavelength in Angstrom for all values of $\lambda$ above 1000, otherwise in $\mu$ m.
Ion	$\lambda$	I	T	$N_{{\rm ion}}$ / $N_{{\rm p}}$	ICF	$N_{{\rm el.}}$ / $N_{{\rm p}}$
He⁺	5875	9.6	11 000	0.069
He⁺⁺	4686	45.	12 500	0.038	1	0.107
C⁺	2325	129.	10 000	2.35(-4)
C⁺⁺	1909	628.	10 500	1.08(-3)
C⁺³	1548	502.	14 000	1.14(-4)	1	14.3(-4)
N⁺	6584	225.	10 200	4.3(-5)
N⁺⁺	1750	41.	11 000	2.63(-4)
N⁺⁺	57.3	27.4.	11 000	3.06(-4)
N⁺³	1485	36.8	14 000	5.68(-5)
N⁺⁴	1239	64.	16 000	2.76(-5)	1	4.2(-4)
O⁺	3727	150.	10 300	1.0(-4)
O⁺	2470	33.5	10 300	1.7(-4)
O⁺⁺	5007	1500.	12 000	3.49(-4)
O⁺⁺	51.8	74.8	12 000	4.90(-4)
O⁺³	25.8	266.	15 500	1.69(-4)
O⁺³	1400	33.5	15 500	1.1 (-4)	1	6.5(-4)
Ne⁺	12.8	8.08	11 000	1.2(-5)
Ne⁺⁺	15.5	166.	12 500	1.14(-4)
Ne⁺⁺	3869	143.	12 500	1.36(-4)
Ne⁺³	2424	116..	16 000	3.84(-5)
Ne⁺⁴	24.3	90.6	16 500	2.37(-5)
Ne⁺⁴	14.3	104.	16 500	1.32(-5)
Ne⁺⁵	7.65	4.1	16 500	1.49(-8)	1	2.0(-4)
S⁺	6731	12.2	10 000	1.0(-6)
S⁺⁺	6312	2.9	10 500	4.27(-6)
S⁺⁺	18.7	32.1	10 500	5.19(-6)
S⁺³	10.5	90.	12 000	3.59(-6)	1.15	1.0(-5)
Ar⁺⁺	7136	24.	11 500	1.71(-6)
Ar⁺⁺	8.99	5.98	11 500	6.14(-7)
Ar⁺³	4740	7.6	12 000	0.99(-6)
Ar⁺⁴	7005	1.8	16 000	1.87(-7)
Ar⁺⁵	4.53	7.95	16 000	1.52(-7)	1.02	2.1(-6)
Cl⁺	8580	0.25	10 300	2.19(-8)
Cl⁺⁺	5538	1.0	10 700	1.01(-7)
Cl⁺³	8046	0.86	12 500	6.07(-8)	1.2	2.2(-7)
Mg⁺	2798	23.	10 000	7.9(-7)
Mg⁺³	4.49	12.	16 000	5.73(-6)
Mg⁺⁴	5.61	19.2	16 000	5.18(-6)	1.7:	2.0(-5):
Si⁺⁺	1888	19.8	10 100	8.0(-7)
Ca⁺⁵	5309	0.18	13 000	2.1(-8)

Intensities (I) given with respect to H $\beta =100$ . The colon ":'' indicates
an uncertain correction for the missing ionization stages.

Source LaTeX | All tables | In the text