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Table 8

Properties of the CO emission region.

Object Ri Rout Rdust (a) Area (AU2) Mtot(d) (M)
B163 0.16 0.29 1.4 8.3 × 1025 3.2 × 1025 0.39 3.6 × 10−6
B243 0.5 0.75 5.8 1.1 × 1025 5.9 × 1024 1.9 2.9 × 10−6
B268 0.094 1.4 4.7 3 × 1025 5.3 × 1023 12 3.6 × 10−6
B275 0.26 0.67 7.8 3 × 1025 7.2 × 1024 2.4 5.9 × 10−6
B331 0.48 0.83 31 1.1 × 1025 4.8 × 1024 2.8 3.7 × 10−6

Notes. The CO emission region is defined as the part of the disk (bounded by Ri and Rout) where the best fitting model CO emission originates. All radii are given in AU and column densities in cm−2. (a)The inner radius of the dust disk. (b) Column density at Ri. (c)Extrapolated column density at Rout. (d)The mass Mtot is the total gas mass of the CO emitting region, based on the assumed CO abundance CO/H2 = 10−4.

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