Table A.1.
Quasars with H I 21 cm absorption from literature.
| Source name | zem(opt) | zabs | Vnull, B | Vnull, R | S1.4GHz | α |  |
S21 cm | ∫τdv | 21 cm Ref. | LAS | LLS | Ref. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (km s−1 ) | (km s−1 ) | (mJy) | ( W Hz−1) | (mJy) | (km s−1 ) | (arcsec) | (kpc) | ||||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) |
| J000557.17+382015.2 | 0.229 | 0.229 | -45.4 | 48.2 | 572.7 | -0.03 ± 0.10 | 25.9 | 547.3 | 1.943 ± 0.057 | 1 | 0.043 | 0.162 | 1, 13 |
| J011137.31+390627.9 | 0.67 | 0.668 | -69.9 | 137.0 | 429.0 | 2.09 ± 0.05 | 26.3 | 180.0 | 46 ± 7 | 2 | 0.005 | 0.036 | 19 |
| J050321.20+020304.6 | 0.5834 | 0.5848 | -98.7 | 57.7 | 2245.1 | 1.07 ± 0.04 | 27.1 | 1600.0 | 3.4 ± 0.4 | 2 | 0.011 | 0.073 | 19 |
| J061048.87+724853.2 | 3.52965 | 3.52983 | -643.0 | 639.0 | 1041.6 | -0.37 ± 0.07 | 28.7 | 1790.2 | 4.69 ± 0.15 | 3 | 0.050 | 0.373 | 3, 15 |
| J080133.56+141443.0 | 1.1946 | 1.1929 | -198.4 | 494.9 | 2734.6 | -1.10 ± 0.11 | 28.4 | 5690.0 | 2.47±0.05 | 4 | 4.0 | 33.0 | 4 |
| J090933.50+425346.5 | 0.67 | 0.67 | -259.8 | 273.5 | 4234.2 | -0.80 ± 0.10 | 27.9 | 6218.1 | 0.68 | 5,6 | 9.2 | 64.5 | 19 |
| J120321.94+041419.0 | 1.22429 | 1.20888 | -105.8 | 679.1 | 1146.6 | -0.65 ± 0.11 | 27.9 | 1675.2 | 2.52 ± 0.12 | 7 | 0.075 | 0.458 | 7, 16 |
| J124823.89−195918.8 | 1.275 | 1.275 | -713.3 | 250.8 | 5136.1 | -0.59 ± 0.04 | 28.6 | 8302.2 | 4.542 ± 0.043 | 7 | 0.040 | 0.230 | 20 |
| J145844.79+372021.5 | 0.33324 | 0.33316 | -41.3 | 37.0 | 215.1 | -0.02 ± 0.03 | 25.8 | 148.4 | 3.834 ± 0.079 | 1 | < 0.01 | < 0.0495 | 1, 14 |
| J150609.53+373051.1 | 0.674 | 0.673 | -327.8 | 74.0 | 937.6 | 0.05 ± 0.10 | 27.1 | 1040.0 | 27.20 ± 0.04 | 8,9 | 0.055 | 0.387 | 9, 17 |
| J154015.23−145341.5 | 2.104 | 2.1139 | -176.1 | 90.0 | 203.7 | -0.69 ± 0.04 | 27.7 | 652.0 | 11.30 ± 0.07 | 10 | > 0.050 | > 0.425 | 10, 18 |
| J154508.52+475154.6 | 1.277 | 1.2797† | -334.5 | 204.0 | 685.7 | -0.36 ± 0.09 | 27.6 | 861.5 | 9.56 ± 0.36 | 1 | 0.060 | 0.516 | 11 |
| J181536.79+612711.6 | 0.601 | 0.594 | -118.6 | 166.0 | 849.3 | -0.48 ± 0.08 | 27.0 | 971.6 | 2.39 | 6 | 0.01 | 0.068 | 19 |
| J195542.73+513148.5 | 1.223 | 1.2206 | -62.5 | 42.3 | 1588.1 | 0.01 ± 0.09 | 27.8 | 1254.1 | 0.716 ± 0.037 | 12 | > 0.050†† | > 0.4275†† | 12 |
| J233913.22−552350.4 | 1.353 | 1.355 | -86.4 | 310.8 | 184.2 | -0.71 ± 0.01 | 27.2 | 336.0 | 3.7 ± 0.2 | ... | < 0.6 | < 5.2 | ... |
| J225503.88+131333.9 | 0.543 | 0.543 | -101.8 | 116.9 | 2706.8 | -0.83 ± 0.11 | 27.5 | 3725.5 | 0.23 | 6 | 2.6 | 16.5 | 19 |
References. (1) Aditya & Kanekar (2018b); (2) Carilli et al. (1998); (3) Aditya et al. (2021); (4) Ishwara-Chandra et al. (2003); (5) Pihlström et al. (1999); (6) Vermeulen et al. (2003); (7) Aditya & Kanekar (2018a); (8) Carilli & van Gorkom (1992); (9) Kanekar & Chengalur (2008); (10) Gupta et al. (2021b); (11) Malkin (2018); (12) Aditya et al. (2017); (13) Fey & Charlot (2000); (14) Helmboldt et al. (2007); (15) Britzen et al. (2007); (16) Liu et al. (2007); (17) Polatidis et al. (1995); (18) Gupta et al. (2022); (19) Gupta et al. (2006); (20)Sokolovsky et al. (2011). Column 1: Source name (J2000); Column 2: Optical redshift; Column 3: Peak H I 21 cm absorption redshift; Column 4 - 5: Velocity to the bluer and redder side of the peak, respectively, where the optical depth goes below the spectrum sensitivity; Column 6: Flux density at 1.4 GHz; Column 7: Spectral index and its associated uncertainty; Column 8: Radio luminosity at 1.4 GHz; Column 9: Flux density at the redshifted 21 cm line frequency; Column 10: Total velocity integrated optical depth; Column 11: H I 21 cm absorption reference; Column 12: Largest Angular Size in arcsec, and Column 13: Largest Linear Size in kpc; Column 14: Reference for LAS and LLS. † centroid of two Gaussian components of similar amplitudes †† size of the radio-core against which the absorption was observed (see Aditya et al. (2017) for more details) * Derived using 1.4 GHz (NVSS) and 4.85 GHz flux densities from NED. In four cases, the spectral turnover falls between 1.4 GHz and 4.85 GHz, or 4.85 GHz measurement is unavailable or dubious. For these measurements at 1.4 GHz and at a lower frequency were used.
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