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Table 2

Absorption line column densities for the three components of the main system.

Atomic/ionic species Observed transitions I (−41 km s-1) II (0 km s-1) III (+ 35 km s-1)

H i Lyα, Lyβ, Lyγ, Lyδ 22.01 ± 0.09
C ii λ1036, λ1334 (S)1
C ii (1s) λ1037, λ1335 14.67 ± 0.04 14.05 ± 0.10 < 13.0
C iv λ1548, λ1550 (S)
N i λ952, λλλ1134 16.37 ± 0.06 15.06 ± 0.03 < 13.7
N v λ1238, λ1242 13.56 ± 0.03
O i λ1039, λ1302 16.16 ± 0.08 (S) 15.53 ± 0.37 (S) 15.68 ± 0.06 (S)
O i (1s) λ1304 15.92 ± 0.22 (S) 14.17 ± 0.18 (S) < 13.8
O i (2s) λ1306 14.38 ± 0.04 14.30 ± 0.05 < 13.8
O vi λ1031, λ1037 (S)
Mg i λ2026, λ2852 15.29 ± 0.03 14.01 ± 0.13 12.45 ± 0.02
Mg ii λ1239, λ1240, λ2796, λ2803 16.28 ± 0.02 15.03 ± 0.22 (S)
Al ii λ1670 15.39 ± 0.15 (S) 16.42 ± 0.08 (S) 13.26 ± 0.05 (S)
Al iii λ1854, λ1862 13.21 ± 0.02 13.12 ± 0.05 12.55 ± 0.11
Si ii λ1020, λ1190, λ1193, λ1260 15.97 ± 0.02 15.78 ± 0.03 15.78 ± 0.03
λ1304, λ1526, λ1808
Si ii (1s) λ1264, λ1309, λ1533, λ1816 14.43 ± 0.01 15.19 ± 0.23 < 13.5
Si iv λ1393, λ1402 14.16 ± 0.04
P i λ1674 13.80 ± 0.10 < 13.7 < 13.7
P ii λ1152 13.61 ± 0.04 13.70 ± 0.04 < 13.1
P v λ1117 13.42 ± 0.04
S ii λ1250, λ1253, λ1259 15.57 ± 0.02 15.12 ± 0.04 14.67 ± 0.04
S vi λ944 14.21 ± 0.03
Ar i λ1048, λ1066, 14.60 ± 0.04 14.32 ± 0.04 13.59 ± 0.07
Ca i λ4227 12.14 ± 0.02 < 11.1
Ca ii λ3934, λ3969 15.21 ± 0.03 14.01 ± 0.13 < 12.7
Cr ii a6S5/2 λ2056, λ2062, λ2066 13.89 ± 0.02 13.75 ± 0.04 13.16 ± 0.07
Fe ii a6D9/2 λ1081, λ1125, λ1143, λ1144 15.42 ± 0.03 15.44 ± 0.02 14.03 ± 0.11
λ1608, λ1611, λ2249, λ2260
λ2344,λ2374, λ2382
Fe ii a6D7/2 (1s) λ1618, λ1621, λ2389, λ2396 13.85 ± 0.04 14.09 ± 0.03 < 12.8
Fe ii a6D5/2 (2s) λ1629, λ1631, λ2328, λ2405 13.55 ± 0.09 13.87 ± 0.04 < 13.4
Fe ii a6D3/2 (3s) λ1636, λ2405, λ2407, λ2411 13.37 ± 0.07 13.55 ± 0.07 < 12.9
Fe ii a6D1/2 (4s) λ1639, λ2411, λ2414 12.81 ± 0.26 13.16 ± 0.12 < 12.8
Fe ii a4F9/2 (5s) λ1566, λ1612, λ1637 13.81 ± 0.02 13.83 ± 0.02 < 13.2
λ1658, λ1696, λ1702
Fe ii a4F7/2 (6s) λ1563, λ1580, λ1625 12.82 ± 0.18 13.41 ± 0.06 < 12.4
λ1659, λ1712
Fe ii a4D7/2 (9s) λ1635, λ2740 < 12.8 13.05 ± 0.16 < 12.8
Ni ii λ1317, λ1370, λ1454 14.22 ± 0.03 13.86 ± 0.05 13.80 ± 0.06
λ1709, λ1741, λ1751
Ni ii (2s) λ2166, λ2217, λ2223, λ2316 13.89 ± 0.04 13.42 ± 0.05 < 12.8
Zn ii λ2026, λ2062 13.21 ± 0.03 12.86 ± 0.07 12.23 ± 0.46

Notes. All values of the column densities are logarithmic (in cm-2). Upper limits are given at the 90% confidence level.

(1)

(S) marks saturated transitions and unreliable column densities.

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