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Table 5

best-fitting FRACS parameters from artificial data generated with a Monte Carlo code.

Parameters Units True values Two power-law One power-law

A 2 –0.8 –0.791 –0.782
m 4.86 5.59 4.74
R in R s 30 29.8 29.9
n in m-3 0.15 0.189 0.169
T in K 1150(a) 1090 1070
γ/γ 0.725/0.478(a) 0.719/0.613 0.676
R T R in 5.24(a) 2.87
W   m-2   μm-1   str-1 6.62 × 103 6.48 × 103 5.04 × 103
PAd deg 125 125 124
i deg 50.0 50.6 50.2

Notes. The column “true values” refers to the MC input parameters, except for Tin, γ, and γ′ which are determined from the results of the MC simulation. The columns “two power-law” and “one power-law” list the best-fit parameters obtained with FRACS assuming two and one power-law for the temperature respectively. The values are respectively 0.73 and 0.79 for two and one power-law.


These values are not prescribed parameters, but are determined from the results of the Monte Carlo simulation. The values reported here are best-fit parameters of the mean disc temperature (see text for more details).

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