Table 5.
Comparison of 14 known H I 21 cm and molecular-absorption-line systems; the first 7 are associated and the remaining ones are intervening.
| Target | ze |  |
N(HI) | FWHM | ∫τdV | N(H2) | FWHM | ∫τdV | Line | zmol | Ref | Ref |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (cm−2) | (km s−1) | (km s−1) | (cm−2) | (km s−1) | (km s−1) | (H I) | (Mol.) | |||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) |
| J0439+0520 | 0.2076 | – | < 5e22 | < 200 | < 28. | 2.0e21 | 126 (210) | 5.4 | CO(1–0) | 0.2077 | H1 | C1 |
| PKS 1200+045 | 1.2243 | 1.2111 | 4.6e21 | 100 (800) | 2.52 | 1.5e20 | 87 (225) | 3.1 | CO(2–1) | 1.21276 | H2 | C2 |
| PKS 1245−197 | 1.275 | 1.2750 | 8.3e21 | 200 (1000) | 4.54 | 3.6e20 | 113 (400) | 7.2 | CO(2–1) | 1.26605 | H2 | C2 |
| 4C+12.50 | 0.1217 | 0.1217 | 6.6e21 | 250 (1800) | 3.6 | 1.8e22 | 250 (600) | 55.0 | CO(3–2) | 0.11806 | H3 | C3 |
| B1504+377 | 0.674 | 0.67343 | 3.8e22 | 130 (175) | 21.0 | 6.0e20 | 75 (100) | 10.4 | CO(2–1) | 0.67343 | H4 | C4 |
| B1740−517 | 0.4423 | 0.44129 | 5.0e21 | 5 (210) | 2.7 | 1.5e20 | 37 (120) | 4.8 | CO(2–1) | 0.44185 | H5 | H5 |
| Abell 2390 | 0.2304 | 0.2310 | 2.5e+22 | 154 (1100) | 13.7 | 8.0e21 | 122 (300) | 28.2 | CO(1–0) | 0.2312 | H6,H1 | C1 |
| PMN0134−0931 | 2.225 | 0.76344 | 9.0e20 | 107 (200) | 4.93 | 2.0e21 | 53 (200) | 70.3 | CO(2–1) | 0.76391 | H7 | C5 |
| PKS 0201+113 | 3.639 | 3.38714 | 1.8e21 | 19 (125) | 0.7 | 6.6e20 | 57 (400) | 6.2 | CO(4–3) | 3.38715 | H8 | C2 |
| B0218+357 | 0.944 | 0.68466 | 4.0e20 | 43 (75) | 2.19 | 4.0e23 | 20 (30) | 20.3 | C18O(2–1) | 0.68466 | H9 | C6, C7 |
| G0248+430 | 1.313 | 0.05151 | 9.7e19 | 19 (90) | 0.53 | 2.9e19 | 16 (30) | 0.25 | CO(1–0) | 0.05151 | H10 | C8 |
| PKS 1406-076 | 1.494 | 1.27464 | 2.5e20 | 11 (50) | 0.51 | 1.0e23 | 77 (155) | 2.4 | HNC(2–1) | 1.26949 | H11 | C2 |
| PKS 1413+135 | ∼0.3 | 0.24671 | 2.0e21 | 18 (180) | 10.86 | 4.6e20 | 2 (5) | 3.64 | CO(1–0) | 0.24671 | H12 | C9 |
| PKS 1830−211 | 2.510 | 0.88489 | 1.8e21 | 180 (400) | 10.1 | 4.0e22 | 40 (400) | 30. | CO(4–3) | 0.88582 | H13 | C10 |
Notes. Columns: (1, 2) favored name and systemic optical redshift; (3) redshift based on H I 21 cm absorption peak; (4, 6) total H I column density, adopting Ts = 1000 K (100 K) for associated (intervening) targets, and integrated optical depth; (5) FWHM of the main absorption component; (7–9) molecular column density, FWHM and total integrated optical based on line in Col. (10); (11) redshift based on the peak of molecular line; (12) and (13) references for H I 21 cm and molecular absorption line. In Cols. (5) and (8), we also give the full velocity extent of the absorption in parentheses.
References. H I-ref – H1: Hogan (2014), H2: Aditya & Kanekar (2018), H3: Morganti et al. (2004), H4: Carilli et al. (1997), H5: Allison et al. (2019), H6: Hernández et al. (2008), H7: Carilli et al. (1993), H8: Kanekar et al. (2007), H9: Koopmans & de Bruyn (2005), H10: Gupta et al. (2018a), H11: Gupta et al. (2012), H12: Carilli et al. (1993), Combes et al. (2023), H13: Kanekar & Briggs (2003). CO-ref – C1: Rose et al. (2019a), C2: present work, C3: Dasyra & Combes (2012), C4: Wiklind & Combes (1996a), C5: Wiklind et al. (2018), C6: Wiklind & Combes (1995), C7: Combes & Wiklind (1995), C8: Combes et al. (2019), C9: Wiklind & Combes (1997), C10: Wiklind & Combes (1998).
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