Table 4
Parameters of the three-component Gaussian fits.
| Fit 1 | Fit 2 | Fit 3 | ||
| i | parameter | baseline U2-U4 | BL < 20 m | all baselines |
|
|
||||
| 1: unresolved | α1 [mas] |
|
|
|
| δ1 [mas] |
|
(6.0) |
|
|
| Δ1 [mas] |
|
|
12 ± 2 | |
| τ 1 |
|
|
|
|
| T1 [K] |
|
(260) | 317 ± 22 | |
| f 1 |
|
|
|
|
|
|
||||
| 2: disk-like | Δ2 [mas] | 45 ± 11 | (45) | 57 ± 15 |
| r 2 |
|
|
0.16 ± 0.04 | |
| ψ2 [°] | 44 ± 6 |
|
46 ± 3 | |
| τ 2 |
|
|
1.88 ± 0.40 | |
| T2 [K] |
|
|
|
|
| f 2 |
|
|
|
|
|
|
||||
| 3: extended | Δ3 [mas] | – |
|
|
| r 3 | – | 0.60 ± 0.12 |
|
|
| ψ3 [°] | – | 114 ± 3 | 107 ± 8 | |
| τ 3 | – |
|
|
|
| ξ3 [arcsec-1] | – |
|
27 ± 6 | |
| T3 [K] | – |
|
|
|
| f 3 |
|
|
|
|
|
|
||||
|
5.22 | 1.06 | 6.32 | |
Notes. Parameters held fixed at certain values are enclosed in
parentheses. The parameters for each of the three components i = [1,2,3]
are: 
– position; Δi – FWHM;
ri – axis ratio;
ψi – position
angle; τi – silicate
optical depth; ξi – gradient of
the silicate optical depth; Ti – temperature;
fi – surface
filling factor. See text for details.
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