Table 2.
Column density (in logscale) of gas species, O I, Ar I, Cl I, Si IV, and C IV, the absorber rest-frame equivalent width (w in Å) of ‘Ca II λ3934’ and ‘Mg II λ2796’ lines, and the velocity spread, Δv (in km s−1) of the ‘Mg II λ2796’ line for ESDLAs.
| QSO | N(O I) | N(Ar I) | N(Cl I) | N(Si IV) | N(C IV) | w(Ca II λ3934) | w(Mg II λ2796) | Δv(Mg II) (b) |
|---|---|---|---|---|---|---|---|---|
| J0017+1307 | > 17.0 | 14.72 ± 0.19 | < 12.55 | 13.38 ± 0.23 | 14.02 ± 0.22 | < 0.57 | 1.88 ± 0.01 | 190 |
| J0025+1145 | > 18.6 | – | 13.5–15.5 | > 14.19 | > 14.71 | 0.7 ± 0.02 | 4.36 ± 0.01 | 390 |
| J1143+1420 | > 18 | < 15.2 | < 12.68 | > 14.02 | > 14.63 | < 1.09 | 3.23 ± 0.02 | 450 |
| J1258+1212 | > 17 | – | < 12.91 | 13.57 ± 0.08 | 14.28 ± 0.03 | < 0.23 | 2.52 ± 0.02 | 190 |
| J1349+0448 | > 16.6 | – | – | – | > 14.38 | 0.43 ± 0.14 | 1.80 ± 0.06 | 160 |
| J1411+1229 | > 17.1 | ∼14.4 | < 12.66 | 13.45 ± 0.05 | 13.47 ± 0.1 | 0.78 ± 0.07 | 0.95 ± 0.07 | 110 |
| J1513+0352 | > 17 | – | 14.63 ± 0.74 | 13.65 ± 0.32 | 14.12 ± 0.32 | 0.15 ± 0.05 | 2.89 ± 0.04 | 340 |
| J2140−0321 | 18.01 ± 0.18 (a) | < 15.7 | 13.37 ± 0.07 (a) | > 14.06 | > 14.63 | 0.26 ± 0.03 | 1.19 ± 0.02 | 150 |
| J2232+1242 | > 16.7 | 14.43 ± 0.14 | < 12.72 | 13.4 ± 0.02 | 13.8 ± 0.04 | 0.34 ± 0.04 | 2.31 ± 0.01 | 200 |
| J2246+1328 | > 16.8 | 14.15 ± 0.32 | < 12.85 | 13.48 ± 0.08 | 14.28 ± 0.19 | 0.60 ± 0.07 | 0.77 ± 0.01 | 100 |
| J2322+0033 | > 15.7 | 14.46 ± 0.21 | < 12.72 | 13.36 ± 0.05 | 13.84 ± 0.04 | < 4.24 | 1.68 ± 0.06 | 150 |
| J0024−0725 | > 17.6 | ∼14.07 | < 13.25 | – | – | 0.29 ± 0.07 | 1.38 ± 0.20 | 110 |
| J1238+1620 | – | ∼14.69 | < 13.44 | – | – | – | 3.94 ± 0.07 | 290 |
| J1353+0956 | > 16.7 | < 14.46 | < 12.61 | – | – | < 0.05 | 1.47 ± 0.18 | 200 |
| J1418+0718 | > 16.7 | < 14.41 | < 12.22 | – | – | – | < 0.97 | 90 |
| J2205+1021 | – | ∼15.25 | < 13.63 | – | – | 0.31 ± 0.08 | 2.63 ± 0.07 | 210 |
| J2351−0639 | – | – | < 13.19 | – | – | – | 1.47 ± 0.17 | 130 |
| J2359+1354 | – | – | < 14.13 | – | – | 0.79 ± 0.11 | 5.63 ± 0.02 | 380 |
Notes. Values starting with ∼ represent detections deemed tentative due to either strong blends with sky lines, low signal-to-noise, and/or contamination from the Lyα forest. The estimates for seven additional ESDLAs presented in the bottom of the table demarcated by the horizontal lines are from Telikova et al. (2022).
Robust estimate for exceptionally high value of N(O I) measured by comparing X-shooter spectra with high resolution UVES spectra (studied in Noterdaeme et al. 2015b). The UVES spectra were also used to measure N(Cl I).
Δv was obtained here for saturated ‘Mg II λ2796’ profiles, and it is defined as the velocity separation between the two extreme pixels where the optical depth τ < 0.1 (see Zou et al. 2018, for detailed discussion). We note that this is different from the standard Δv90 measurement of unsaturated lines.
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