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Table 3

Standard model parameters.

Mass loss rate (10-5 M yr-1) 5
Inner radius (AU) 8
Superwind radius (RSW, AU) 500
Ratio of old to superwind mass loss (Φ) 0.1
Outer radius dust shell (AU) 500 000
Luminosity central object (L) 7000
Temperature central object (K) 2700
Radius central object (R) 385
Terminal velocity (vexp, km s-1) 10

Dust abundances (% by mass):
 Amorphous olivine 92
 Metallic iron 4
 Crystalline olivine 4

Dust composition:
 Amorphous olivine 0.5
 Metallic iron Fe (solid)
 Crystalline olivine Mg2SiO4
 Dust shape model CDE
 Location of the crystalline olivine < R SW

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