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Table 4

Best-fit parameters for the envelope model.

D [pc] 59 RSil [R] 60
Tbb [K] 2500 ro [R] 1.6
L [L] 4500 ϵ 0.65
gas [M year-1] 1.25 × 10-7 β 5
dust [M year-1] 4.05 × 10-10 υdrift [km s-1] 8.4
υ [km s-1] 5.5 υturb [km s-1] 1
R [cm] 2.5 × 1013

Notes. Listed are the assumed distance D, the black-body stellar effective temperature Tbb, the stellar luminosity L, the gas and dust mass-loss rates gas and dust, the maximum expansion velocity υ, the radius of the onset of the acceleration of the wind ro, the inner radius of the silicate emission RSil, the exponent of the temperature power law ϵ, the exponent of the velocity profile β, and the drift and turbulent velocities υdrift and υturb.

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