Table 4: Total and ionic chemical abundances, and ionization correction factors of Sextans A and Sextans B PNe, computed with the ICF method.
SexA-PN SexB-PN1 SexB-PN2 SexB-PN3 SexB-PN4 SexB-PN5

He⁺/H⁺ $\times$ 10² 3.6 $\pm$ 1.1 9.8 $\pm$ 1.5 9.3 $\pm$ 1.5 7.4 $\pm$ 1.5 9.4 $\pm$ 1.3 12.8 $\pm$ 2.

He⁺⁺/H⁺ $\times$ 10² 4.8 $\pm$ 0.5 0.09 $\pm$ 0.05 0.3 $\pm$ 0.1 0.2 $\pm$ 0.1 0.1 $\pm$ 0.1 0.5 $\pm$ 0.1

He/H $\times$ 10² 8.4 $\pm$ 1.6 9.9 $\pm$ 1.5 9.6 $\pm$ 1.6 7.6 $\pm$ 1.6 0.95 $\pm$ 1.4 13.3 $\pm$ 2.1

N⁰/H⁺ $\times$ 10⁵ 3.9 $\pm$ 1.2 - - - - -

N⁺/H⁺ $\times$ 10⁵ 7.1 $\pm$ 0.9 0.008: 0.003: 0.03 $\pm$ 0.01 0.015 $\pm$ 0.01 0.04 $\pm$ 0.02

ICF(N) 3.0 72. 19. - 45. 130.

N/H $\times$ 10⁵ 22. $\pm$ 10. 0.5: 0.5: >0.03 0.7 $\pm$ 0.5 5. $\pm$ 3.

O⁰/H⁺ $\times$ 10⁵ 5.2 $\pm$ 1.1 0.06 $\pm$ 0.01 0.07 $\pm$ 0.01 - - -

O⁺/H⁺ $\times$ 10⁵ 4.3 $\pm$ 1.6 0.13 $\pm$ 0.30 0.27 $\pm$ 0.30 - 0.4 $\pm$ 0.9 0.1 $\pm$ 0.2

O⁺⁺/H⁺ $\times$ 10⁵ 3.2 $\pm$ 0.3 9.4 $\pm$ 3.6 4.8 $\pm$ 3.5 3.4 $\pm$ 1.9 17.3 $\pm$ 4. 15.9 $\pm$ 4.

ICF(O) 1.7 1.0 1.0 1.0 1.0 1.0

O/H $\times$ 10⁵ 13.0 $\pm$ 3.7 9.6 $\pm$ 3.7 5.2 $\pm$ 3.9 3.5 $\pm$ 2.4 17.8 $\pm$ 5. 16.4 $\pm$ 5.

Ne⁺⁺/H⁺ $\times$ 10⁶ 9.2 $\pm$ 3.1 150. $\pm$ 80. 55. $\pm$ 30. 80. $\pm$ 60. 30. $\pm$ 10. 45. $\pm$ 20.

ICF(Ne) 4.1 1.0 1.1 1.0 1.0 1.0

Ne/H $\times$ 10⁵ 0.38 $\pm$ 0.20 1.6 $\pm$ 1.2 0.6 $\pm$ 0.3 0.8 $\pm$ 0.6 3. $\pm$ 1. 5. $\pm$ 3.

S⁺/H⁺ $\times$ 10⁷ 2.3 $\pm$ 0.8 - - - - -

S⁺⁺/H⁺ $\times$ 10⁷ 3.9 $\pm$ 0.8 - - 0.8 $\pm$ 0.8 0.9 $\pm$ 0.8 2.5 $\pm$ 1.

ICF(S) 1.1 - - - 2.5 3.5

S/H $\times$ 10⁷ 7.0 $\pm$ 1.9 - - >0.8 2. $\pm$ 1. 9. $\pm$ 3.

Ar⁺⁺/H⁺ $\times$ 10⁸ 9.1 $\pm$ 8.7 - - 19. $\pm$ 10. - -

Ar⁺⁺⁺/H⁺ $\times$ 10⁸ - - - 16. $\pm$ 10. - -

ICF(Ar)
1.9 - - 1.3 - -

Ar/H $\times$ 10⁷ 1.7 $\pm$ 1.7 - - 5. $\pm$ 4. - -

**Table 4:** Total and ionic chemical abundances, and ionization correction factors of Sextans A and Sextans B PNe, computed with the ICF method.
	SexA-PN	SexB-PN1	SexB-PN2	SexB-PN3	SexB-PN4	SexB-PN5
He⁺/H⁺ $\times$ 10²	3.6 $\pm$ 1.1	9.8 $\pm$ 1.5	9.3 $\pm$ 1.5	7.4 $\pm$ 1.5	9.4 $\pm$ 1.3	12.8 $\pm$ 2.
He⁺⁺/H⁺ $\times$ 10²	4.8 $\pm$ 0.5	0.09 $\pm$ 0.05	0.3 $\pm$ 0.1	0.2 $\pm$ 0.1	0.1 $\pm$ 0.1	0.5 $\pm$ 0.1
He/H $\times$ 10²	8.4 $\pm$ 1.6	9.9 $\pm$ 1.5	9.6 $\pm$ 1.6	7.6 $\pm$ 1.6	0.95 $\pm$ 1.4	13.3 $\pm$ 2.1
N⁰/H⁺ $\times$ 10⁵	3.9 $\pm$ 1.2	-	-	-	-	-
N⁺/H⁺ $\times$ 10⁵	7.1 $\pm$ 0.9	0.008:	0.003:	0.03 $\pm$ 0.01	0.015 $\pm$ 0.01	0.04 $\pm$ 0.02
ICF(N)	3.0	72.	19.	-	45.	130.
N/H $\times$ 10⁵	22. $\pm$ 10.	0.5:	0.5:	>0.03	0.7 $\pm$ 0.5	5. $\pm$ 3.
O⁰/H⁺ $\times$ 10⁵	5.2 $\pm$ 1.1	0.06 $\pm$ 0.01	0.07 $\pm$ 0.01	-	-	-
O⁺/H⁺ $\times$ 10⁵	4.3 $\pm$ 1.6	0.13 $\pm$ 0.30	0.27 $\pm$ 0.30	-	0.4 $\pm$ 0.9	0.1 $\pm$ 0.2
O⁺⁺/H⁺ $\times$ 10⁵	3.2 $\pm$ 0.3	9.4 $\pm$ 3.6	4.8 $\pm$ 3.5	3.4 $\pm$ 1.9	17.3 $\pm$ 4.	15.9 $\pm$ 4.
ICF(O)	1.7	1.0	1.0	1.0	1.0	1.0
O/H $\times$ 10⁵	13.0 $\pm$ 3.7	9.6 $\pm$ 3.7	5.2 $\pm$ 3.9	3.5 $\pm$ 2.4	17.8 $\pm$ 5.	16.4 $\pm$ 5.
Ne⁺⁺/H⁺ $\times$ 10⁶	9.2 $\pm$ 3.1	150. $\pm$ 80.	55. $\pm$ 30.	80. $\pm$ 60.	30. $\pm$ 10.	45. $\pm$ 20.
ICF(Ne)	4.1	1.0	1.1	1.0	1.0	1.0
Ne/H $\times$ 10⁵	0.38 $\pm$ 0.20	1.6 $\pm$ 1.2	0.6 $\pm$ 0.3	0.8 $\pm$ 0.6	3. $\pm$ 1.	5. $\pm$ 3.
S⁺/H⁺ $\times$ 10⁷	2.3 $\pm$ 0.8	-	-	-	-	-
S⁺⁺/H⁺ $\times$ 10⁷	3.9 $\pm$ 0.8	-	-	0.8 $\pm$ 0.8	0.9 $\pm$ 0.8	2.5 $\pm$ 1.
ICF(S)	1.1	-	-	-	2.5	3.5
S/H $\times$ 10⁷	7.0 $\pm$ 1.9	-	-	>0.8	2. $\pm$ 1.	9. $\pm$ 3.
Ar⁺⁺/H⁺ $\times$ 10⁸	9.1 $\pm$ 8.7	-	-	19. $\pm$ 10.	-	-
Ar⁺⁺⁺/H⁺ $\times$ 10⁸	-	-	-	16. $\pm$ 10.	-	-
ICF(Ar)	1.9	-	-	1.3	-	-
Ar/H $\times$ 10⁷	1.7 $\pm$ 1.7	-	-	5. $\pm$ 4.	-	-

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and data reduction
	3 Chemical abundances of planetary nebulae and H II regions
	4 The peculiar PN of Sextans A
	5 Summary
	References