Wolf-Rayet stars in the Small Magellanic Cloud - I. Analysis of the single WN stars

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Table A.1

Atomic model used in the stellar atmosphere calculations.

Ion	Number of levels	Number of lines

H i	22	231
H ii	1	0
He i	35	595
He ii	26	325
He iii	1	0
N i	1	45
N ii	38	703
N iii	36	630
N iv	38	703
N v	20	190
N vi	1	91
C i	1	105
C ii	32	496
C iii	40	780
C iv	21	300
C v	1	10
O ii	37	666
O iii	33	528
O iv	25	300
O v	36	630
O vi	16	120
O vii	15	105
P iv	12	66
P v	11	55
P vi	1	0
G ii^a	1	0
G iii^a	8	25
G iv^a	11	49
G v^a	13	69
G vi^a	17	121
G vii^a	11	52
G viii^a	9	34
G ix^a	9	35
G x^a	1	0

Notes.

^(a)

G denotes a generic atom which incorporates the following iron group elements Fe, Sc, Ti, Cr, Mn, Co, and Ni. The corresponding ions are treated by means of a superlevel approach (for details see Gräfener et al. 2002).

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