Table 3
Structural properties of the H I disk.
| Name | M H I | R H I | R opt | R H I / R opt | Ref. |
| (107M⊙) | (kpc) | (kpc) | |||
|
|
|||||
| Galaxies with a regularly rotating H I disk | |||||
| NGC 1705 | 11.1 ± 2.9 | 2.1 | 1.5 | 1.4 | a |
| NGC 2366 | 62 ± 17 | 6.8 | 4.4 | 1.5 | b |
| NGC 4068 | 14.9 ± 1.6 | 3.1 | 1.8 | 1.7 | b |
| NGC 4214 | 43 ± 8 | 5.5 | 2.2 | 2.5 | b |
| NGC 6789 | 1.8 ± 0.3 | 1.0 | 0.7 | 1.4 | a |
| UGC 4483 | 2.9 ± 0.5 | 1.4 | 0.6 | 2.3 | a |
| I Zw 18 | 21 ± 3 | 3.3 | 0.5 | 6.6 | c |
| I Zw 36 | 6.7 ± 1.3 | 1.9 | 0.9 | 2.1 | a |
| SBS 1415+437 | 20.1 ± 4.6 | 4.3 | 2.4 | 1.8 | a |
| Galaxies with a kinematically disturbed H I disk | |||||
| NGC 625 | 9.7 ± 2.2 | 2.6 | 3.3 | 0.8 | a |
| NGC 1569 | 29.1 ± 4.5 | 3.9 | 3.0 | 1.3 | b |
| NGC 4163 | 1.5 ± 0.2 | 1.1 | 1.0 | 1.1 | b |
| NGC 4449 | 300 ± 77 | 8.9 | 3.3 | 2.7 | b |
| NGC 5253 | 13.8 ± 3.4 | 3.1 | 2.1 | 1.5 | a |
| UGC 6456 | 4.5 ± 0.5 | 1.8 | 1.2 | 1.5 | c |
| UGC 9128 | 1.3 ± 0.2 | 0.9 | 0.6 | 1.5 | b |
| Galaxies with unsettled H I distribution | |||||
| UGC 6541 | 1.2 ± 0.2 | ... | 0.9 | ... | c |
| UGCA 290 | 1.4 ± 0.2 | ... | 0.9 | ... | a |
Notes. The H I radius RH I is defined as the radius where the H I surface density profile reaches 1 M⊙ pc-2. The optical radius Ropt is defined as 3.2 Rd, where Rd is the exponential scale length. The last column provides references for Rd.
Reference. a) this work, b) Swaters & Balcells (2002), c) Papaderos et al. (2002).
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