Table 3
Same as Table 2, but now reporting the radius of a body (in km) for which the probability of catastrophic impact is 50%, for each disk zone and assumed slope of the projectile size distribution.
| Target zone> q |
I | II | III |
|
|
|||
| −2.5 | 50 (50) | 50 (50) | 50 (43) |
| −3.0 | 50 (50) | 50 (50) | 48 (37) |
| −3.5 | 50 (50) | 50 (44) | 29 (20) |
Notes.In parentheses we report the same quantity estimated by using the dynamical state of the disk after 100 My of evolution, instead of that shown in the top panel of Fig. 1 (300 My). When the result exceeds 50 km (the value at which the size distribution is no longer described by a power law with exponent q), we report 50 for simplicity.
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