Table 2.
Main properties of the proximate absorption systems
| Quasar | log N(H I) | log N(H2) | [Zn/H] | [S/H] | [Si/H] | [Fe/H] | AV(a) | Δv90(b) |
|---|---|---|---|---|---|---|---|---|
| (cm−2) | (cm−2) | (mag) | (km s−1) | |||||
| J0015+1842 | 20.71±0.12 | 19.73 ± 0.02 | −0.41±0.13 | −0.54±0.14 | −0.78±0.12 | −1.79±0.12 | 0.40±0.10 | 450 |
| J0019–0137 | 21.02±0.11 | 20.29 ± 0.01 | −0.90±0.12 | −1.00±0.11 | −0.96±0.12 | −2.03±0.11 | 0.08±0.01 | 190 |
| J0059+1124 | 21.77±0.11 | 19.07 ± 0.02 | −1.40±0.15 | −1.37±0.16 | −1.03±0.34 | −2.02±0.13 | 0.04±0.02 | 170 |
| J0125–0129 | 21.90±0.15 | 20.05 ± 0.01 | −0.96±0.15 | −0.96±0.16 | −0.92±0.16 | −1.66±0.15 | 0.19±0.01 | 430 |
| J0136+0440 | 20.73±0.11 | 18.65 ± 0.07 | − | −0.59±0.11 | −0.80±0.12 | −1.24±0.11 | 0.04±0.01 (c) | 190 |
| J0858+1749 | 20.40±0.11 | 19.72 ± 0.02 | −0.52±0.12 | −0.57±0.12 | −0.96±0.11 | −2.26±0.11 | 0.12±0.01 (c) | 190 |
| J1236+0010 | 20.65±0.11 | 19.75 ± 0.01 | −0.55±0.13 | −0.48±0.11 | −0.71±0.11 | −1.70±0.11 | 0.07±0.02 | 400 |
| J1248+0639 | 20.55±0.11 | 19.76 ± 0.01 | −0.55±0.16 | −0.48±0.19 | −0.89±0.12 | −1.76±0.11 | −0.05±0.02 | 240 |
| J1259+0309 | 21.42±0.11 | 19.10 ± 0.01 | −1.57±0.12 | −1.39±0.11 | −1.33±0.11 | −1.85±0.11 | −0.05±0.01 | 90 |
| J1331+0206 | 21.41±0.11 | 20.11 ± 0.01 | −1.56±0.14 | −1.67±0.12 | −1.61±0.12 | −1.94±0.12 | 0.04±0.02 | 80 |
| J1358+1410 | 21.19±0.11 | 19.85 ± 0.02 | −0.96±0.14 | −0.96±0.11 | −0.87±0.11 | −1.76±0.11 | 0.06±0.03 | 170 |
| J2228–0221 | 20.98±0.11 | 19.44 ± 0.02 | −0.52±0.11 | −0.54±0.11 | −1.00±0.11 | −1.94±0.11 | 0.24±0.03 | 110 |
| J2325+1539 | 21.74±0.11 | 20.25 ± 0.01 | −1.15±0.11 | −1.03±0.11 | −1.14±0.11 | −1.70±0.11 | 0.16±0.03 | 240 |
Notes.
Statistical error only from the dispersion between measurements. The systematic error on AV is about 0.07 mag (see text).
Balashev et al. (2019) quoted AV = 0.16 and 0.29 for J0136+0440 and J0858+1749, respectively. However, these values were obtained with a varying intrinsic power law, as is usually done in attempt to separate the intrinsic slope from that due to an intervening absorber. Here, as for other quasars in our sample, we consistently re-measured AV using a fixed power law to quantify the amount of dust in the overall systems.
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