Table 3.
Noticeable emission lines in the NIR.
| Ion | Rest wavelength | Velocity | Dopplershift (a) | Comment |
|---|---|---|---|---|
| (micron) | (km s−1) | (km s−1) | ||
| H I | 1.282 | 1084 | −164 | Pβ, mainly red side |
| H I | 2.166 | 1038 | −117 | Brγ, mainly red side |
| H2 | 1.747 | 971 | −14 | Potentially |
| H2 | 2.121 | Not strong, only red side, maybe also 1.957 and 2.033 | ||
| He I | 1.012 | 1107 | −141 | |
| He I | 1.083 | 1189 | −74 | Several components |
| He I | 1.279 | 968 | −111 | Only red reliable |
| He I | 2.059 | 1070 | −167 | Red side strong |
| [S II] | 1.032 | 731 | 712 | Two components of this quadruple? |
| [S II] | 1.037 | 724 | 247 | |
| [Fe II] | 1.189 | 1066 | −154 | |
| [Fe II] | 1.257 | 1175 | −172 | Strong |
| [Fe II] | 1.295 | Weak, only red side | ||
| [Fe II] | 1.321 | 1180 | −190 | |
| [Fe II] | 1.533 | 1057 | −174 | Red side clear |
| [Fe II] | 1.600 | 1066 | −210 | Red side very clear |
| [Fe II] | 1.644 | 1189 | −170 | Strong |
| [Fe II] | 1.677 | Only red side | ||
| [Fe II] | 1.811 | 1015 | −400 | Weaker |
| [P II] | 1.189 | 1060 | 493 | Phosphorus, maybe also 1.147 |
Notes.
Most lines come both blue and redshifted. The velocities tabulated are ± the velocity offset from center, and the Dopplershift is a measure of that central wavelength versus the given rest wavelength. These were measured on the 2D frame of OB6. There also seems to be some lines we did not identify, for example at wavelengths 1.38, 1.82, 1.88, 1.95 microns.
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