Open Access
Table 3
Best-fitting parameters of each observation.
| Combination | 2017 Mar. 28 | 2018 May 9 | |||||
|---|---|---|---|---|---|---|---|
| Parameter | Description | Gaussian | Eccentric | Gaussian | Eccentric | Gaussian | Eccentric |
| x0 (″) | RA offset | 0.021 ± 0.032 | 0.030 ± 0.034 | 0.049 ± 0.062 | 0.059 ± 0.070 | 0.009 ± 0.038 | 0.036 ± 0.041 |
| y0 (″) | Dec offset | 0.052 ± 0.031 | 0.061 ± 0.035 | 0.153 ± 0.082 | 0.184 ± 0.099 | 0.006 ± 0.040 | 0.054 ± 0.042 |
| r0 (au) | Disc central radius | 133.7 ± 1.6 | 133.3 ± 1.4 | 134.3 ± 2.6 | 134.5 ± 2.6 | 132.9 ± 1.6 | 132.5 ± 1.6 |
| σr (au) | Radial standard deviation | 10.0 ± 2.1 | 10.2 ± 2.2 | 9.3 ± 4.3 | 9.3 ± 4.7 | 10.0 ± 2.0 | 10.0 ± 2.0 |
| σh | Vertical aspect ratio | 0.07 ± 0.02 | 0.07 ± 0.01 | 0.06 ± 0.03 | 0.06 ± 0.03 | 0.08 ± 0.02 | 0.08 ± 0.02 |
| F (mJy) | Flux of disc | 2.34 ± 0.13 | 2.32 ± 0.13 | 2.35 ± 0.21 | 2.36 ± 0.21 | 2.40 ± 0.16 | 2.41 ± 0.16 |
| Fc (μJy) | Flux at stellar position | 183 ± 14 | 183 ± 15 | 198 ± 30 | 200 ± 31 | 184 ± 16 | 184±16 |
| PA (°) | Disc position angle | 28.3 ± 0.7 | 28.3 ± 0.7 | 27.9 ± 1.0 | 28.0 ± 1.1 | 28.5 ± 0.8 | 28.2 ± 0.8 |
| i (°) | Disc inclination | 67.0 ± 0.7 | 66.9 ± 0.7 | 65.8 ± 1.1 | 65.9 ± 1.1 | 67.9 ± 0.8 | 67.8 ± 0.8 |
| e | Disc eccentricity | − | 0.014 ± 0.007 | − | 0.004 ± 0.010 | − | 0.028 ± 0.011 |
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