Table A.1: Absolute Abundances of NGC 3293, NGC 4755, NGC 2004 and NGC 330 stars. The abundances presented below are the mean absolute abundances of each species studied, using the initial atmospheric parameters from Tables 3 and 4. Numbers in the parentheses represent the number of lines of each species observed in the star, only 1 line was considered for C  II, Mg  II and Si  IV, 2 lines for Si  II and 3 for Si  III. Uncertainties on the abundances account for both random and systematic errors as discussed in Sect. 5.1. Abundances are presented as [X] = 12 + $\log$ ([X/H]) in units of dex.
Star Sp. Typ C II N II   O II   Mg II Si II Si III Si IV Fe III  
NGC 3293-003 B1 III 7.83 7.51 $\pm$ 0.05 (5) 8.66 $\pm$ 0.24 (27) 7.30 $\pm$ 0.26   7.31 $\pm$ 0.34 7.30 $\pm$ 0.65 7.27 $\pm$ 0.27 (1)
NGC 3293-004 B1 III 7.89 7.55 $\pm$ 0.09 (5) 8.74 $\pm$ 0.23 (21) 7.44 $\pm$ 0.29   7.45 $\pm$ 0.31 7.45 $\pm$ 0.62    
NGC 3293-007 B1 III 7.86 7.50 $\pm$ 0.08 (4) 8.67 $\pm$ 0.20 (28) 7.25 $\pm$ 0.21 7.35 $\pm$ 0.41 7.36 $\pm$ 0.30 7.34 $\pm$ 0.60 7.26 $\pm$ 0.22 (2)
NGC 3293-010 B1 III 7.66 7.46 $\pm$ 0.12 (6) 8.88 $\pm$ 0.33 (28) 7.17 $\pm$ 0.25 6.86 $\pm$ 0.26 7.60 $\pm$ 0.43 7.63 $\pm$ 0.62 7.31 $\pm$ 0.26 (1)
NGC 3293-012 B1 III 7.67 7.50 $\pm$ 0.17 (4) 8.96 $\pm$ 0.36 (25) 7.28 $\pm$ 0.23   7.66 $\pm$ 0.42 7.69 $\pm$ 0.61    
NGC 3293-018 B1 V 7.67 7.61 $\pm$ 0.13 (5) 8.84 $\pm$ 0.30 (27) 7.20 $\pm$ 0.20 6.87 $\pm$ 0.22 7.71 $\pm$ 0.37 7.70 $\pm$ 0.55 7.68 $\pm$ 0.19 (2)
NGC 3293-026 B2 III 7.81 7.78 $\pm$ 0.21 (4) 8.96 $\pm$ 0.33 (30) 7.29 $\pm$ 0.31 6.95 $\pm$ 0.25 7.76 $\pm$ 0.38 7.80 $\pm$ 0.56 7.66 $\pm$ 0.19 (2)
NGC 3293-043 B3 V 7.91 7.55 $\pm$ 0.26 (7) 8.50 $\pm$ 0.34 (19) 7.14 $\pm$ 0.26 7.31 $\pm$ 0.37 7.31 $\pm$ 0.34   7.51 $\pm$ 0.25 (1)
NGC 4755-002 B3 Ia 7.84 8.16 $\pm$ 0.30 (7) 8.57 $\pm$ 0.43 (26) 7.28 $\pm$ 0.32 7.38 $\pm$ 0.28 7.37 $\pm$ 0.45   7.53 $\pm$ 0.22 (2)
NGC 4755-003 B2 III 7.74 8.09 $\pm$ 0.26 (7) 8.50 $\pm$ 0.37 (27) 7.27 $\pm$ 0.26 7.34 $\pm$ 0.25 7.34 $\pm$ 0.41   7.46 $\pm$ 0.18 (2)
NGC 4755-004 B1.5 Ib 7.73 8.06 $\pm$ 0.14 (7) 8.65 $\pm$ 0.28 (31) 7.25 $\pm$ 0.28 7.34 $\pm$ 0.34 7.37 $\pm$ 0.37 7.35 $\pm$ 0.69 7.37 $\pm$ 0.24 (1)
NGC 4755-006 B1 III 7.64 7.76 $\pm$ 0.23 (4) 9.16 $\pm$ 0.38 (24) 7.18 $\pm$ 0.23   7.76 $\pm$ 0.43 7.78 $\pm$ 0.54    
NGC 4755-015 B1 V 7.66 7.98 $\pm$ 0.25 (5) 9.07 $\pm$ 0.33 (30) 7.16 $\pm$ 0.26   7.83 $\pm$ 0.35 7.84 $\pm$ 0.52 7.72 $\pm$ 0.23 (1)
NGC 4755-017 B1.5 V 7.83 7.63 $\pm$ 0.35 (4) 8.57 $\pm$ 0.45 (14) 7.19 $\pm$ 0.31 7.22 $\pm$ 0.29 7.20 $\pm$ 0.42      
NGC 4755-020 B2 V 7.95 7.61 $\pm$ 0.20 (6) 8.42 $\pm$ 0.30 (29) 7.34 $\pm$ 0.27 7.24 $\pm$ 0.25 7.20 $\pm$ 0.32   7.83 $\pm$ 0.29 (1)
NGC 4755-033 B3 V 7.92 7.28 $\pm$ 0.27 (2) 8.41 $\pm$ 0.36 ( 3) 7.02 $\pm$ 0.25 7.06 $\pm$ 0.22 7.05 $\pm$ 0.31      
NGC 4755-040 B2.5 V 8.45 7.87 $\pm$ 0.39 (2) 9.19 $\pm$ 0.32 ( 3) 7.28 $\pm$ 0.42 7.71 $\pm$ 0.58 7.70 $\pm$ 0.35      
NGC 4755-048 B3 V 8.15 7.32 $\pm$ 0.31 (2) 8.81 $\pm$ 0.38 ( 4) 7.03 $\pm$ 0.27 7.19 $\pm$ 0.30 7.18 $\pm$ 0.33      
NGC 2004-003 B5 Ia 7.68 7.86 $\pm$ 0.40 (7) 8.46 $\pm$ 0.55 (20) 7.04 $\pm$ 0.26 7.24 $\pm$ 0.26 7.25 $\pm$ 0.50   7.30 $\pm$ 0.23 (2)
NGC 2004-005 B8 Ia 7.50 7.67 $\pm$ 0.37 (5) 8.56 $\pm$ 0.57 ( 4) 6.78 $\pm$ 0.46 6.95 $\pm$ 0.36 6.94 $\pm$ 0.44   7.13 $\pm$ 0.23 (2)
NGC 2004-007 B8 Ia 7.36 7.47 $\pm$ 0.28 (2) 8.46 $\pm$ 0.53 ( 3) 6.67 $\pm$ 0.43 6.82 $\pm$ 0.39 6.82 $\pm$ 0.44   7.02 $\pm$ 0.26 (2)
NGC 2004-010 B2.5 Iab 7.50 8.13 $\pm$ 0.28 (7) 8.29 $\pm$ 0.36 (27) 7.06 $\pm$ 0.26 7.15 $\pm$ 0.24 7.16 $\pm$ 0.41   7.25 $\pm$ 0.12 (2)
NGC 2004-011 B1.5 Ia 7.45 7.72 $\pm$ 0.07 (7) 8.39 $\pm$ 0.21 (30) 7.15 $\pm$ 0.26   7.13 $\pm$ 0.32 7.16 $\pm$ 0.64 7.14 $\pm$ 0.22 (2)
NGC 2004-012 B1.5 Iab 7.44 7.75 $\pm$ 0.09 (7) 8.43 $\pm$ 0.24 (31) 7.08 $\pm$ 0.23   7.19 $\pm$ 0.35 7.21 $\pm$ 0.64 7.12 $\pm$ 0.19 (2)
NGC 2004-014 B3 Ib 7.52 7.51 $\pm$ 0.25 (7) 8.22 $\pm$ 0.37 (23) 6.96 $\pm$ 0.20 7.09 $\pm$ 0.19 7.08 $\pm$ 0.38   7.16 $\pm$ 0.17 (2)
NGC 2004-021 B1.5 Ib 7.56 7.20 $\pm$ 0.10 (6) 8.53 $\pm$ 0.28 (29) 7.09 $\pm$ 0.23   7.31 $\pm$ 0.37 7.32 $\pm$ 0.60 7.19 $\pm$ 0.20 (2)
NGC 2004-022 B1.5 Ib 7.31 7.70 $\pm$ 0.13 (7) 8.59 $\pm$ 0.28 (32) 6.94 $\pm$ 0.19   7.31 $\pm$ 0.37 7.31 $\pm$ 0.59 7.00 $\pm$ 0.25 (1)
NGC 2004-026 B2 II 7.51 7.02 $\pm$ 0.11 (4) 8.19 $\pm$ 0.28 (30) 7.03 $\pm$ 0.18 7.16 $\pm$ 0.21 7.17 $\pm$ 0.34   7.31 $\pm$ 0.15 (2)
NGC 2004-029 B1.5 e 7.43 6.81 $\pm$ 0.05 (4) 8.29 $\pm$ 0.26 (30) 7.03 $\pm$ 0.19   7.21 $\pm$ 0.35 7.20 $\pm$ 0.56 7.35 $\pm$ 0.17 (2)
NGC 2004-036 B1.5 III 7.46 7.43 $\pm$ 0.11 (6) 8.72 $\pm$ 0.32 (28) 6.88 $\pm$ 0.20   7.57 $\pm$ 0.41 7.59 $\pm$ 0.58 7.32 $\pm$ 0.28 (1)
NGC 2004-042 B2.5 III 7.62 6.89 $\pm$ 0.18 (2) 8.14 $\pm$ 0.31 (16) 7.09 $\pm$ 0.21 7.11 $\pm$ 0.22 7.11 $\pm$ 0.36   7.17 $\pm$ 0.20 (1)
NGC 2004-046 B1.5 III 7.54 7.62 $\pm$ 0.11 (6) 8.53 $\pm$ 0.17 (30) 7.05 $\pm$ 0.22   7.43 $\pm$ 0.33 7.43 $\pm$ 0.53    
NGC 2004-053 B0.2 Ve 7.93 7.73 $\pm$ 0.16 (3) 8.51 $\pm$ 0.19 (28) 7.31 $\pm$ 0.24   7.41 $\pm$ 0.30 7.41 $\pm$ 0.60    
NGC 2004-061 B2 III 7.78 7.00 $\pm$ 0.24 (3) 8.32 $\pm$ 0.46 (16) 7.20 $\pm$ 0.30 7.26 $\pm$ 0.31 7.27 $\pm$ 0.48   7.53 $\pm$ 0.34 (1)
NGC 2004-064 B2 III 7.50 7.56 $\pm$ 0.09 (5) 8.50 $\pm$ 0.16 (29) 7.12 $\pm$ 0.29 0.00 $\pm$ 0.00 7.47 $\pm$ 0.31 7.49 $\pm$ 0.55    
NGC 2004-070 B0.7-B1 III 7.59 7.48 $\pm$ 0.12 (4) 8.73 $\pm$ 0.19 (21) 7.23 $\pm$ 0.29 0.00 $\pm$ 0.00 7.60 $\pm$ 0.33 7.61 $\pm$ 0.51    
NGC 2004-084 B0.7-B1 III 7.64 7.28 $\pm$ 0.14 (4) 8.57 $\pm$ 0.16 (26) 7.22 $\pm$ 0.23 0.00 $\pm$ 0.00 7.56 $\pm$ 0.32 7.57 $\pm$ 0.48    
NGC 2004-090 O9.5 III 7.53 7.54 $\pm$ 0.19 (3) 8.32 $\pm$ 0.23 (24) 6.91 $\pm$ 0.19 0.00 $\pm$ 0.00 6.94 $\pm$ 0.29 6.93 $\pm$ 0.39    
NGC 2004-091 B1.5 III 7.80 7.28 $\pm$ 0.08 (5) 8.34 $\pm$ 0.13 (27) 7.26 $\pm$ 0.24 0.00 $\pm$ 0.00 7.16 $\pm$ 0.24 7.16 $\pm$ 0.51    
NGC 2004-108 B2.5 III 7.29 6.89 $\pm$ 0.14 (3) 8.23 $\pm$ 0.30 (28) 6.99 $\pm$ 0.20 6.98 $\pm$ 0.23 6.98 $\pm$ 0.31 0.00 $\pm$ 0.00 7.35 $\pm$ 0.21 (1)
NGC 2004-119 B2 III 7.48 6.95 $\pm$ 0.09 (3) 8.35 $\pm$ 0.27 (29) 7.17 $\pm$ 0.25 7.14 $\pm$ 0.24 7.14 $\pm$ 0.34 0.00 $\pm$ 0.00 7.34 $\pm$ 0.25 (1)
NGC 330-002 B3 Ib 7.08 7.58 $\pm$ 0.33 (8) 7.99 $\pm$ 0.52 (14) 6.55 $\pm$ 0.22 6.74 $\pm$ 0.22 6.78 $\pm$ 0.46   6.70 $\pm$ 0.25 (1)
NGC 330-003 B2 Ib 7.28 7.74 $\pm$ 0.19 (8) 8.11 $\pm$ 0.36 (24) 6.82 $\pm$ 0.27 6.89 $\pm$ 0.27 6.95 $\pm$ 0.43   6.90 $\pm$ 0.25 (1)
NGC 330-004 B2.5 Ib 6.84 7.83 $\pm$ 0.14 (8) 7.86 $\pm$ 0.32 (15) 6.73 $\pm$ 0.21 6.76 $\pm$ 0.21 6.82 $\pm$ 0.39   6.83 $\pm$ 0.14 (1)
NGC 330-005 B5 Ib 6.77 7.49 $\pm$ 0.37 (4) 7.82 $\pm$ 0.45 ( 2) 6.58 $\pm$ 0.19 6.76 $\pm$ 0.23 6.81 $\pm$ 0.43      
NGC 330-009 B5 Ib 6.99 7.14 $\pm$ 0.37 (2) 8.19 $\pm$ 0.52 ( 3) 6.57 $\pm$ 0.26 6.61 $\pm$ 0.22 6.65 $\pm$ 0.45      
NGC 330-010 B5 Ib 7.07 7.05 $\pm$ 0.31 (2) 7.62 $\pm$ 0.40 ( 3) 6.52 $\pm$ 0.17 6.57 $\pm$ 0.18 6.65 $\pm$ 0.38      
NGC 330-014 B1.5 Ib 6.93 7.56 $\pm$ 0.16 (7) 8.18 $\pm$ 0.27 (20) 6.72 $\pm$ 0.21   6.96 $\pm$ 0.33 6.96 $\pm$ 0.54    
NGC 330-016 B5: II 7.24 7.08 $\pm$ 0.35 (1) 7.97 $\pm$ 0.50 ( 2) 6.57 $\pm$ 0.17 6.55 $\pm$ 0.16 6.61 $\pm$ 0.44      
NGC 330-017 B2 II 7.07 7.12 $\pm$ 0.12 (8) 7.64 $\pm$ 0.25 (24) 6.47 $\pm$ 0.17   6.74 $\pm$ 0.33   6.90 $\pm$ 0.21 (1)
NGC 330-018 B3 II 7.17 7.24 $\pm$ 0.26 (3) 8.05 $\pm$ 0.37 ( 7) 6.61 $\pm$ 0.18 6.74 $\pm$ 0.18 6.80 $\pm$ 0.36   7.14 $\pm$ 0.21 (1)
NGC 330-020 B3 II 7.14 7.15 $\pm$ 0.49 (2) 7.99 $\pm$ 0.64 ( 4) 6.73 $\pm$ 0.34 7.05 $\pm$ 0.45 7.11 $\pm$ 0.60      
NGC 330-022 B3 II 7.10 7.27 $\pm$ 0.24 (8) 7.76 $\pm$ 0.35 ( 8) 6.64 $\pm$ 0.14 6.53 $\pm$ 0.14 6.58 $\pm$ 0.34      
NGC 330-026 B2.5 II 7.30 7.23 $\pm$ 0.19 (3) 7.74 $\pm$ 0.30 ( 6) 7.02 $\pm$ 0.23   6.64 $\pm$ 0.39      
NGC 330-027 B1 V 7.13 7.45 $\pm$ 0.23 (2) 8.33 $\pm$ 0.45 ( 8) 6.44 $\pm$ 0.22   6.90 $\pm$ 0.39 6.88 $\pm$ 0.79    
NGC 330-032 B0.5 V 7.16 7.37 $\pm$ 0.10 (3) 7.90 $\pm$ 0.07 (22) 6.80 $\pm$ 0.20   6.77 $\pm$ 0.19 6.77 $\pm$ 0.45    
NGC 330-042 B2 II 7.06 7.20 $\pm$ 0.06 (7) 7.69 $\pm$ 0.12 (19) 6.86 $\pm$ 0.17   6.67 $\pm$ 0.28 6.66 $\pm$ 0.49    
NGC 330-047 B1 V 7.20 6.76 $\pm$ 0.11 (2) 8.07 $\pm$ 0.13 (24) 6.57 $\pm$ 0.15   6.83 $\pm$ 0.23 6.84 $\pm$ 0.46    
NGC 330-074 B0 V 7.29 7.52 $\pm$ 0.21 (2) 7.93 $\pm$ 0.17 ( 7) 6.83 $\pm$ 0.18   6.94 $\pm$ 0.24 6.95 $\pm$ 0.50    
NGC 330-114 B2 III 7.24 7.34 $\pm$ 0.18 (3) 8.02 $\pm$ 0.28 (18) 6.99 $\pm$ 0.22   6.90 $\pm$ 0.34      
NGC 330-124 B0.2 V 7.57 7.41 $\pm$ 0.26 (1) 7.81 $\pm$ 0.18 ( 3) 6.78 $\pm$ 0.18   6.98 $\pm$ 0.26 6.98 $\pm$ 0.48    

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