Table 1
Some combinations of the physical properties of the dust that satisfy the observed depth of the transit.
| Pyroxene | Enstatite | Forsterite | Iron | |||||
| A2 | ρ | τ | ρ | τ | ρ | τ | ρ | τ |
|
|
||||||||
| 0.01 micron | ||||||||
| –10 | 42 | 0.066 | 110 | 0.064 | 90 | 0.064 | 0.75 | 0.066 |
| –15 | 54 | 0.081 | 150 | 0.082 | 120 | 0.080 | 0.99 | 0.082 |
| –20 | 66 | 0.095 | 178 | 0.094 | 145 | 0.094 | 1.20 | 0.096 |
| –25 | 79 | 0.110 | 215 | 0.11 | 177 | 0.11 | 1.45 | 0.11 |
|
|
||||||||
| 0.1 micron | ||||||||
| –10 | 0.26 | 0.075 | 0.30 | 0.073 | 0.26 | 0.072 | 0.33 | 0.069 |
| –15 | 0.33 | 0.091 | 0.38 | 0.086 | 0.33 | 0.086 | 0.42 | 0.082 |
| –20 | 0.41 | 0.110 | 0.46 | 0.10 | 0.40 | 0.10 | 0.50 | 0.095 |
| –25 | 0.49 | 0.120 | 0.56 | 0.12 | 0.49 | 0.12 | 0.60 | 0.11 |
|
|
||||||||
| 1 micron | ||||||||
| –10 | 3.0 | 0.14 | 3.0 | 0.13 | 3.0 | 0.13 | 7.1 | 0.12 |
| –15 | 3.8 | 0.17 | 3.8 | 0.15 | 3.8 | 0.15 | 8.6 | 0.13 |
| –20 | 4.6 | 0.19 | 4.6 | 0.18 | 4.6 | 0.18 | 10.8 | 0.16 |
| –25 | 5.6 | 0.23 | 5.6 | 0.21 | 5.6 | 0.21 | 13.0 | 0.19 |
Notes.The columns are: density exponent A2, dust
density ρ(0) at the edge of ring in × 10-15
g cm-3, and maximum optical depth τ for pyroxene with
20% of iron, enstatite, forsterite, and iron. The three blocks are for various dust
particle radii: 0.01, 0.1, and 1 micron. The model assumes that the geometrical
cross-section of the ring is 0.01 and 0.09 
at the
beginning and the end of the ring, respectively.
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