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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; ΔiFWHM; 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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