Observational properties of massive black hole binary progenitors

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Volume 609 (January 2018)

A&A, 609 (2018) A94

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Table A.1

Atomic models used in the stellar atmosphere calculations.

	Model atom set I		Model atom set II		Model atom set III
Ion	Number of levels	Number of lines^a	Number of levels	Number of lines^a	Number of levels	Number of lines^a

H i	22	231	22	231	0	0
H ii	1	0	1	0	0	0
He i	35	271	35	271	35	271
He ii	26	325	26	325	26	325
He iii	1	0	1	0	1	0
N ii	38	201	0	0	0	0
N iii	36	146	36	146	36	146
N iv	38	154	38	154	38	154
N v	20	114	20	114	20	114
N vi	14	48	14	48	14	48
C ii	32	148	0	0	0	0
C iii	40	226	40	226	40	226
C iv	25	230	25	230	25	230
C v	29	120	29	120	29	120
C vi	15	105	15	105	15	105
O ii	37	150	0	0	0	0
O iii	33	121	33	129	33	129
O iv	29	76	29	76	29	76
O v	36	153	36	153	36	153
O vi	16	101	16	101	16	101
O vii	0	0	15	64	15	64
O viii	0	0	1	0	1	0
S iii	23	38	23	38	23	38
S iv	11	13	11	15	11	15
S v	10	8	10	8	10	8
S vi	1	0	1	0	1	0
Mg i	1	0	0	0	0	0
Mg ii	32	120	32	120	32	120
Mg iii	43	158	43	158	43	158
Mg iv	17	27	17	27	17	27
Mg v	0	0	20	25	20	25
Mg vi	0	0	21	32	21	32
Mg vii	0	0	1	0	1	0
Si ii	1	0	1	0	1	0
Si iii	24	68	24	68	24	68
Si iv	23	72	23	72	23	72
Si v	1	0	1	0	1	0
P iv	12	16	12	16	12	16
P v	11	22	11	22	11	22
P vi	1	0	1	0	1	0
G ii^b	1	0	0	0	0	0
G iii^b	13	40	1	0	1	0
G iv^b	18	77	18	77	18	77
G v^b	22	107	22	107	22	107
G vi^b	29	194	29	194	29	194
G vii^b	19	87	19	87	19	87
G viii^b	14	49	14	49	14	49
G ix^b	15	56	15	56	15	56
G x^b	1	0	28	170	28	170
G xi^b	0	0	26	161	26	161
G xii^b	0	0	13	37	13	37
G xiii^b	0	0	15	50	15	50
G xiv^b	0	0	14	49	14	49
G xv^b	0	0	10	25	10	25
G xvi^b	0	0	9	20	9	20
G xvii^b	0	0	1	0	1	0

Notes.

^(a)

Not counted are transitions with a negligible oscillator strength.

^(b)

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

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