Table 5
Derived masses of the filament regions.
| (1) | (2) | (3) | (4) | (5) | (6) |
|---|---|---|---|---|---|
| M(HISA) (M⊙) | M(H I) (M⊙) | M(H2) (M⊙) | fHISA | fatomic | |
| GMF20.0-17.9 |  |
 |
2.3 ± 1.2 × 105 | 0.03 | 0.55 |
| GMF26.7-25.4 |  |
 |
5.5 ± 2.8 × 104 | 0.04 | 0.36 |
| GMF38.1-32.4a |  |
 |
3.0 ± 1.5 × 105 | 0.03 | 0.55 |
| GMF38.1-32.4b |  |
 |
5.5 ± 2.8 × 104 | 0.09 | 0.55 |
| GMF41.0-41.3 |  |
 |
1.7 ± 0.9 × 104 | 0.04 | 0.46 |
| GMF54.0-52.0 |  |
 |
1.6 ± 0.8 × 104 | 0.06 | 0.26 |
Notes. The masses were calculated from the column density maps shown in Appendix F. Column (2) presents the mass of the cold atomic hydrogen traced by HISA. The uncertainties are statistical errors arising from the uncertainties in background fraction and spin temperature and do not include the systematic uncertainties due to the detection method. Column (3) shows the atomic hydrogen mass inferred from the optical depth and continuum corrected H I emission. The uncertainties are estimated from variations in the optical depth measurement. Column (4) gives the molecular hydrogen mass as traced by 13CO emission along with a conservative 50% uncertainty owing to the large uncertainties in the CO-H2 conversion. Column (5) gives the mass traced by HISA as a fraction of the total atomic gas mass M(HISA) + M(H I). Column (6) is the fraction of the total atomic gas mass traced by HISA and H I emission with respect to the total gas mass M(HISA) + M(H I) + M(H2).
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