Table 6
H i column density determinations.
| Value | Method | Instrumenta | Ref. |
|
|
|||
| Absorption | |||
|
|
|||
| 21.34 ± 0.04 | Lyα (NW) | HST/COS (≈2.5″) | (1) |
| ≈21.32 | Lyβ | FUSE (30″ × 30″) | (2) |
| 21.54 ± 0.06 | Lyα (NW) | IUE & HST/GHRS (2″) | (3) |
| 21.34 ± 0.07 | Lyman series | FUSE (30″ × 30″) | (4) |
| 21.32 ± 0.09 | Lyman series | FUSE (30″ × 30″) | (5) |
| 22.3 | Lyα (peak) | HST/STIS (52″ × 0.5″) | (6) |
|
|
|||
| Emission | |||
|
|
|||
| ≈21.2 | 21 cm (NW) | VLA (8″) | (7) |
| ≈21.20 | 21 cm | VLA (20″) | (8) |
| 21.53 ± 0.15 | 21 cm (NW) | VLA (5″) | (8) |
| ≈21.48 | 21 cm (NW) | VLA (2″) | (8) |
Notes.
The value in parentheses indicate either the aperture (absorption measurements) or the beam size (emission measurements).
Reference. (1) This study; (2) Vidal-Madjar et al. (2000); (3) Kunth et al. (1994); (4) A03; (5) L04; (6) Brown et al. (2002); (7) van Zee et al. (1998); (8) Lelli et al. (2012).
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