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Table 2
Effect of the uncertainties in different input parameters on gravitational torques and inflow rates for M 51.
| Uncertainty due to... | Δt (%) | Δt for R< 22′′ (%) | Δ(d2M/ dr dt) (%) | Δ(d2M/ dr dt) for R< 22′′ (%) |
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| Uncorrected, original 3.6 μm image | 101.3 | 70.7 | 93.2 | 73.0 |
| Inclination (±5°) | 51.7 | 39.3 | 45.3 | 50.1 |
| Position angle (±3°) | 34.6 | 6.7 | 21.0 | 19.0 |
| Radially varying M/L | 21.4 | 27.8 | 20.5 | 27.5 |
| Shift of stellar mass map (0.75′′) | 20.3 | 71.2 | 34.3 | 80.6 |
| Shift of gas image (0.75′′) | 12.6 | 27.2 | 17.5 | 33.7 |
| Stellar disc scale-height (±20%) | 5.1 | 10.8 | 6.4 | 11.0 |
| Stellar disc vertical function (sech2 vs. sech) | 2.4 | 5.4 | 3.1 | 5.6 |
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| PAWS: 1.7′′ vs. 3′′ | 38.3 | 32.6 | 26.1 | 22.2 |
| PAWS: 1.7′′ vs. 6′′ | 43.9 | 32.0 | 64.0 | 72.0 |
| PAWS: 1.7′′ vs. 13′′ | 84.5 | 111.2 | 90.1 | 103.3 |
| PAWS 6′′ vs. THINGS 6′′ | 79.7 | 65.6 | 85.8 | 85.1 |
| PAWS 13′′ vs. HERACLES 13′′ | 32.2 | 40.0 | 41.0 | 34.0 |
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