Table 2
Nebular emission lines identified in the 8 o’clock arc images A2 and A3 with their fluxes.
| A2 | A3 | |||||
| Line | λlab (Å)a | F tot | F main | F blob | F tot | Comments |
|
|
||||||
| [O ii] | 3727.0897 | 32.9 ± 2.7 | 20.7 ± 2.0 | 12.3 ± 1.5 | 24.9 ± 5.2 | Strongly affected by telluric absorption |
| [O ii] | 3729.8804 | 29.1 ± 1.8 | 18.3 ± 1.5 | 10.8 ± 1.1 | 22.4 ± 2.2 | Strongly affected by telluric absorption |
| [Ne iii] | 3869.8468 | 11.0 ± 0.6 | 6.9 ± 0.5 | 4.1 ± 0.4 | 6.9 ± 0.7 | Partly affected by telluric absorption |
| Hδ | 4102.8976 | 8.5 ± 0.6 | 5.4 ± 0.5 | 3.3 ± 0.7 | 5.0 ± 0.7 | Partly affected by sky residuals |
| Hγ | 4341.6903 | 17.9 ± 0.4 | 11.3 ± 1.5 | 6.7 ± 1.4 | 12.7 ± 0.6 | |
| Hβ | 4862.6880 | 46.0 ± 2.7 | 28.9 ± 2.1 | 17.1 ± 1.9 | 27.2 ± 2.7 | Strongly affected by telluric absorption |
| Hβinferredb | 44.5 ± 1.8 | 28.4 ± 5.0 | 16.1 ± 4.4 | 31.3 ± 2.8 | ||
| [O iii] | 4960.2939 | 50.5 ± 4.7 | 31.7 ± 3.1 | 18.8 ± 2.7 | 27.3 ± 5.7 | Strongly affected by telluric absorption |
| Hα | 6564.6329 | 181.2 ± 9.6 | 120.7 ± 11.2 | 60.5 ± 8.4 | 125.8 ± 17.7 | Partly affected by telluric absorption |
| Hαintrinsicc | 452.2 ± 72.2 | 336.2 ± 130.0 | 123.5 ± 73.2 | 302.5 ± 125.3 | ||
| [N ii] | 6585.2284 | 19.5 ± 3.7 | 15.6 ± 3.8 | 4.0 ± 2.7 | 20.1 ± 5.0 | Noisy (2−3σ detection) |
Notes. Integrated line fluxes in units of 10-17 erg s-1 cm-2. For A2 are listed the total fluxes, Ftot, and the individual fluxes corresponding to the decomposition of the line profiles into two Gaussian components associated with the main galaxy, Fmain, and a star-forming blob, Fblob, as described in Sect. 3.3.
Inferred Hβ line fluxes from the Hγ line flux and the E(B − V)gas color excess derived from the Hα/Hγ Balmer decrement (Sect. 4.2).
Intrinsic Hα line fluxes after correcting for dust extinction by E(B − V)gas values derived from the Hα/Hγ Balmer decrement (Sect. 4.2).
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