Table 3
Hydrogen number density and CH3OH column density in Barnard 1b.
| Offset (″) | Av (mag)(1) | Tdust (K)(2) | Gas density nH2 (cm-3) | N(A-CH3OH) (cm-2) | N(E-CH3OH) (cm-2) | N(CH3OH) (cm-2) | N(CH3OH)/N(H) | E/A Ratio |
|---|---|---|---|---|---|---|---|---|
| 0 | 72 | 10.0 | (2.7 ± 0.6) × 105 | (7 ± 1) × 1013 | (6 ± 1) × 1013 | (1.3 ± 0.2) × 1014 | (1.0 ± 0.1) × 10-9 | 0.9 ± 0.3 |
| 15 | 53 | 10.5 | (3.2 ± 0.7) × 105 | (5 ± 1) × 1013 | (4.1 ± 0.9) × 1013 | (9 ± 1) × 1013 | (1.0 ± 0.1) × 10-9 | 0.8 ± 0.2 |
| 30 | 38.7 | 11.7 | (2.6 ± 0.9) × 105 | (2.8 ± 0.6) × 1013 | (2.3 ± 0.5) × 1013 | (5.1 ± 0.8) × 1013 | (7 ± 1) × 10-10 | 0.8 ± 0.2 |
| 45 | 24.2 | 12.4 | (2.3 ± 0.5) × 105 | (2.0 ± 0.4) × 1013 | (1.8 ± 0.4) × 1013 | (3.8 ± 0.6) × 1013 | (8 ± 1) × 10-10 | 0.9 ± 0.3 |
| 60 | 20.0 | 12.8 | (1.9 ± 0.4) × 105 | (1.4 ± 0.3) × 1013 | (1.3 ± 0.6) × 1013 | (2.7 ± 0.6) × 1013 | (7 ± 2) × 10-10 | 0.9 ± 0.4 |
| 75 | 17.8 | 13.3 | (1.6 ± 0.4) × 105 | (1.1 ± 0.2) × 1013 | (1.0 ± 0.2) × 1013 | (2.1 ± 0.3) × 1013 | (6 ± 1) × 10-10 | 0.9 ± 0.3 |
| 90 | 16.2 | 13.7 | (1.4 ± 0.4) × 105 | (1.0 ± 0.2) × 1013 | (1.0 ± 0.2) × 1013 | (2.0 ± 0.3) × 1013 | (7 ± 1) × 10-10 | 0.9 ± 0.3 |
| 105 | 14.9 | 14.1 | (1.4 ± 0.4) × 105 | (1.1 ± 0.2) × 1013 | (1.0 ± 0.2) × 1013 | (2.1 ± 0.3) × 1013 | (7 ± 1) × 10-10 | 0.9 ± 0.3 |
| 120 | 13.6 | 14.4 | (9 ± 2) × 104 | (1.1 ± 0.2) × 1013 | (1.0 ± 0.2) × 1013 | (2.1 ± 0.3) × 1013 | (8 ± 1) × 10-10 | 0.9 ± 0.3 |
| 135 | 12.3 | 14.7 | (9 ± 3) × 104 | (9 ± 2) × 1012 | (9 ± 6) × 1012 | (1.8 ± 0.6) × 1013 | (8 ± 2) × 10-10 | 0.9 ± 0.6 |
| 150 | 11.0 | 15.0 | (1.8 ± 0.5) × 104 | (7 ± 1) × 1012 | (7 ± 3) × 1012 | (1.3 ± 0.3) × 1013 | (6 ± 2) × 10-10 | 1.0 ± 0.5 |
| 165 | 9.8 | 15.3 | (1.2 ± 0.3) × 104 | (5 ± 1) × 1012 | (4.4 ± 0.9) × 1012 | (1.0 ± 0.1) × 1013 | (5.3 ± 0.8) × 10-10 | 0.8 ± 0.2 |
| 180 | 8.6 | 15.7 | (5 ± 2) × 103 | (4.2 ± 0.9) × 1012 | (4.4 ± 0.9) × 1012 | (9 ± 1) × 1012 | (5.3 ± 0.8) × 10-10 | 1.0 ± 0.3 |
| 195 | 8.0 | 16.0 | (5 ± 2) × 103 | (3.5 ± 0.8) × 1012 | (2.7 ± 0.6) × 1012 | (6 ± 1) × 1012 | (4.2 ± 0.7) × 10-10 | 0.8 ± 0.3 |
| 210 | 7.4 | 16.3 | (4 ± 2) × 103 | (3.3 ± 0.7) × 1012 | (1.6 ± 0.4) × 1012 | (4.9 ± 0.8) × 1012 | (3.5 ± 0.6) × 10-10 | 0.5 ± 0.2 |
| 225 | 6.3 | 16.5 | (1.9 ± 0.9) × 103 (a) | (2.7 ± 0.6) × 1012 | (2.4 ± 0.7) × 1012 | (5 ± 1) × 1012 | (4.3 ± 0.8) × 10-10 | 0.9 (b) |
| 240 | 6.2 | 16.7 | (2 ± 1) × 103 (a) | <4 × 1012 | <4 × 1012 | <8 × 1012 | <7 × 10-10 | — |
Notes. (1)The uncertainty in the visual extinction across the strip is ~2%. (2)The uncertainty in the dust temperature across the strip is ± 0.1 K. (a)The density at this offset is taken from Navarro-Almaida et al. (2020). (b)This E/A ratio at this offset is set to be equal to the theoretical one.
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