Table 6
Best-fit model parameters obtained from MoD calculations, including statistical errors.
| L [L⊙ ] | τ0.55μm | Td [K ] | p1 | y1 [pc] | δy [pc] | s1 | p2 | Md [M⊙] | |
|---|---|---|---|---|---|---|---|---|---|
| U Hya | 5670 ± 50 | 0.09 ± 0.001 | 51 | 1.9 ± 0.007 | 0.11 ± 0.001 | 0.02 ± 0.001 | 230 ± 12 | 2.0 | (2.2 ± 0.4) × 10−5 |
| W Ori | 9500 ± 180 | 0.28 ± 0.003 | 47 | 2.05 ± 0.003 | 0.17 ± 0.007 | 0.03 ± 0.004 | 15 ± 1 | 2.0 | (3.5 ± 0.3) × 10−6 |
Notes. L is the luminosity of the central star, τ is the optical depth of the entire dust envelope at 0.55 μm and y1 and δy are the radius and width of the detached shell, given in pc. The condensation temperature Tc was kept fixed at 1000 K. Td is the dust temperature at distance y1 and Md is the dust mass in the detached shell with thickness δy. p1 and p2 are the slope of the density power law for the inner part of the shell and the detached shell, respectively. s1 is the density contrast of the detached shell. The provided formal errors are the variation of the parameters which would yield a χ2 = 1, including allobservational constraints.
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