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Table 1

Continuum results: best-fit parameters foro: (i) a single component model (elliptical Gaussian in the u, v plane), (ii) and a double-component model (two circular Gaussian functions after deprojection in the u, v plane according to the orientation and inclination determined at optical wavelength).

0.87 mm 1.3 mm 2.8 mm
Synthesized beam
Beam size FWHM (″) 0.43 × 0.35 2.1 × 1.0 0.76 × 0.56
Beam size FWHM (au) 47 × 39 231 × 110 84 × 62
Beam PA (°) 121 14 57

Zero-baseline flux
Fν (u, v ≃ 0, mJy) 6.00 ± 0.25 4.00 ± 0.25 0.70± 0.05
Spectral index(*) (β) −0.16 ± 0.29

Single-component fit EGAUSS
Fν (best-fit, mJy) 3.93 ± 0.15 3.76 ± 0.29 0.39 ± 0.02
Semi-major axis FWHM (au) 54 ± 2 253 ± 26 35 ± 4
Semi-minor axis FWHM (au) 41 ± 2 156 ± 13 32 ± 4
Inclination (°) 41 ± 5 53 ± 6 24
PA (°) 2 ± 7 21 ± 8 20 ± 50

Double-component fit CGAUSS
(mJy) 7.42 ± 1.42 4.20 ± 1.24 0.71 ± 0.09
(best-fit, mJy) 3.02 ± 0.16 1.66 ± 0.57 0.32 ± 0.02
FWHMint (au) 35 ± 2 110 ± 33 28 ± 6
Spectral index(*) (βint) −0.05 ± 0.07
(best-fit, mJy) 4.4 ± 1.3 2.54 ± 0.67 0.39 ± 0.07
FWHMout (au) 322 ± 55 418 ± 121 407 ± 66
Spectral index(*) (βout) 0.17 ± 0.23
(fixed PA = 356°, i = 53°)

Notes. Fν (u, v≃ 0) corresponds to the maximum flux density measured at the shortest baseline for each frequency. (*) To compute the spectral index, we add quadratically an arbitrary uncertainty of 10% of the flux values to account for the instrumental calibration.

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