Table 1.
Properties of the broad absorption troughs in COS observations of NGC 3783.
| Line | λ0 (Å) | ν1 (km s−1) | ν2 (km s−1) | ν0 (km s−1) | σν (km s−1) | EW (Å) | log(Nion) (cm−2) | Cf |
|---|---|---|---|---|---|---|---|---|
| COS 2016-12-12 | ||||||||
| Lyα | 1215.67 | −6960 | 0 | −3000 | 830 | 2.16 ± 0.08 | > 14.58 | 0.18 |
| N V | 1240.51 | −6600 | 0 | −1300 | 1050 | 3.10 ± 0.11 | > 15.66 | 0.37 |
| Si II | 1260.42 | −6810 | 0 | – | – | < 0.22 | < 13.63 | – |
| C II | 1334.53 | −6810 | 0 | – | – | < 0.18 | < 14.22 | – |
| Si IV | 1398.27 | −7620 | 0 | −3000 | 2300 | 1.33 ± 0.09 | > 14.48 | 0.08 |
| C IV | 1549.48 | −6810 | 0 | −3000 | 1470 | 6.13 ± 0.21 | > 15.51 | 0.30 |
| COS 2016-12-21 | ||||||||
| Lyα | 1215.67 | −6960 | 0 | −3000 | 860 | 1.25 ± 0.05 | > 14.35 | 0.12 |
| N V | 1240.51 | −6600 | 0 | −1300 | 880 | 2.38 ± 0.09 | > 15.56 | 0.33 |
| Si II | 1260.42 | −6810 | 0 | – | – | < 0.18 | < 13.68 | – |
| C II | 1334.53 | −6810 | 0 | – | – | < 0.20 | < 14.13 | – |
| Si IV | 1398.27 | −7620 | 0 | −3000 | 1680 | 1.61 ± 0.10 | > 14.55 | 0.11 |
| C IV | 1549.48 | −6810 | 0 | −3000 | 1320 | 4.05 ± 0.15 | > 15.31 | 0.23 |
Notes.λo is the vacuum rest wavelength of the spectral feature. Absorption troughs span the velocity range given by ν1 to ν2. ν0 is the transmission-weighted velocity centroid of the trough, EW is its equivalent width, and log(Nion) is the inferred ionic column density. Assuming the trough is saturated, Cf is the covering factor at the deepest point in the absorption trough.
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