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Table 1

Best-fit results with 3σ uncertainties of the power-law models from Ertel et al. (2014).

Parameter Best fit

One-component model Two-component model
Inner disc Outer disc

r1 [au] 8.3 29.2 90.9
r2 [au] 394.0 500.0* 500.0*
α –0.1 –4.0 –1.6
smin [μm] 8.1 5.2 12.4
γ –4.0 –5.5 –4.3
θ [deg] 63.9 60
M d [M] 1.3 × 10-2 2.1 × 10-4 1.1 × 10-2
Dust material astrosilicate astrosilicate

Notes. The dust surface number density is defined as nsγrα. r1 and r2 are the inner and outer boundaries of a disc, θ is the disc inclination from face-on, and Md the dust mass for particles with radii s< 1 mm. Values marked with

(*)

were fixed in the modelling and are not outcomes of the fitting procedure.

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