The far-ultraviolet spectra of “cool” PG 1159 stars

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Volume 582 (October 2015)

A&A, 582 (2015) A94

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Table 3

Nitrogen lines identified in PG 1707+427.

Wavelength	Ion	Transition

979.77, 979.83, 979.90, 979.97	N iii	2s2p²²D − 2p³²D^o
989.79:^a, 991.51:^b, 991.58:^b	N iii	2s²2p ²P^o − 2s2p²²D
1005.99:, 1006.04:	N iii	2s2p²²S − 2p³²P^o
1183.03:	N iii
921.99, 922.52, 923.06,
923.22, 923.68, 924.28	N iv	2s2p ³P^o − 2p²³P
948.15, 948.24, 948.29,
948.54, 948.56, 948.61^c	N iv	3p ³P^o − 4d²³D
955.33	N iv	2s2p ¹P^o − 2p²¹S
1036.12–1036.33	N iv	3d ³D − 4f ³F^o
1078.71	N iv	3d ¹D − 4f ¹F^o
1104.54	N iv	3p ¹P^o − 4s ¹S
1117.93	N iv	2s3d ¹D − 2p3d ¹P^o
1123.81	N iv	3p ¹D − 4d ¹D^o
1131.04, 1131.49, 1132.02,
1132.22, 1132.68, 1132.94	N iv	2s3p ³P^o − 2p3p ³P
1133.12, 1135.25, 1136.27	N iv	2s3s ³S − 2p3s ³P^o
1188.00:	N iv	2s3s ¹S − 2p3s ¹P^o
1018.97, 1019.29, 1019.31	N v	4p − 6d
1048.13, 1048.23	N v	4d − 6f
1049.65, 1049.71	N v	4f − 6g

Notes.

^(a)

Dominated by N iii i.s.;

^(b)

dominated by H₂ i.s.;

^(c)

blend with C iv.

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