Table 3
Sizes of the 2.2 μm continuum and Brγ emission (listed as 2.2 μm/Brγ) towards G034.8211, G282.2988, G287.3716, G301.8147, G231.7986, and G233.8306 based on a single (i.e. Gaussian, disc) brightness distribution fit in LITpro.
| Source | Model | Flux w. 1 | Flux w. 2 | Flux w. 3 | Diameter(†) | Flatten ratio | PA (minor axis) | Red. χ2 | Measured size(a) |
|---|---|---|---|---|---|---|---|---|---|
| [2.2 μm/Brγ] (mas) | [2.2 μm/Brγ] | [2.2 μm/Brγ] | [2.2 μm/Brγ] | (mas) | |||||
| (degrees) | |||||||||
| G034.8211 | Disc | n/a | 1.0 | n/a | 5.65 ± 0.08/6.2 ± 0.8 | 1.50 ± 0.02∕1.5 ± 0.2 | 34 ± 2/25 ± 10 | 10/20 | |
| Gaussian | n/a | 1.0 | n/a | 3.46 ± 0.02/3.42 ± 0.06 | 1.52 ± 0.01/1.51 ± 0.04 | 20 ± 1/17 ± 4 | 20/17 | 3.47 ± 0.04 | |
| Ring | n/a | 1.0 | n/a | 6.2 ± 0.4/3 ± 1 | 1.50 ± 0.1/1.5 ± 0.3 | 23 ± 14/24 ± 17 | 30/35 | ||
| G301.8147 | Disc | 0.26 ± 0.04 | 0.22 ± 0.03 | 0.52 ± 0.08 | 5.22 ± 0.1/2.27 ± 0.07 | n/a | n/a | 3/6 | |
| Gaussian | 0.22 ± 0.03 | 0.28 ± 0.04 | 0.50 ± 0.08 | 3.1 ± 0.1/1.42 ± 0.04 | n/a | n/a | 2.8/7 | 3.0 ± 0.1 | |
| Ring | 0.22 ± 0.07 | 0.26 ± 0.06 | 0.52 ± 0.08 | 5.2(b)/2.26(b) | n/a | n/a | 3/8 | ||
| G287.3716 | Disc | 0.62 ± 0.06 | 0.38 ± 0.04 | n/a | 4.42 ± 0.07/3.68 ± 0.4 | n/a | n/a | 1.8/7 | |
| Gaussian | 0.52 ± 0.05 | 0.48 ± 0.05 | n/a | 2.34 ± 0.05/1.28 ± 0.05 | n/a | n/a | 1.76/2.3 | 2.15 ± 0.03 | |
| Ring | 0.62 ± 0.09 | 0.38 ± 0.07 | n/a | 4.42(b)/2.00 ± 0.01 | n/a | n/a | 1.8/2.6 | ||
| G282.2988 | Disc | 0.64 ± 0.15 | 0.27 ± 0.06 | 0.09 ± 0.02 | 3.29 ± 0.07/1.77 ± 0.01 | n/a | n/a | 13/17 | |
| Gaussian | 0.55 ± 0.10 | 0.36 ± 0.08 | 0.09 ± 0.02 | 1.69 ± 0.04/1.25 ± 0.8 | n/a | n/a | 12/5 | 2.15 ± 0.02 | |
| Ring | 0.65 ± 0.20 | 0.27 ± 0.08 | 0.09 ± 0.02 | 3.3(b)/1.5(b) | n/a | n/a | 12/25 | ||
| G231.7986 | Disc | n/a | 0.91 ± 0.02 | 0.09 ± 0.02 | 1.8 ± 0.01 | n/a | n/a | 2 | n/a |
| Gaussian | n/a | 0.91 ± 0.02 | 0.09 ± 0.02 | 1.1 ± 0.01 | n/a | n/a | 2 | ||
| Ring | n/a | 0.91 ± 0.02 | 0.09 ± 0.02 | 1.4 ± 0.03 | n/a | n/a | 2.2 | ||
| G233.8306 | Disc | n/a | 0.84 ± 0.05 | 0.16 ± 0.04 | 3.6 ± 0.03 | n/a | n/a | 2.3 | n/a |
| Gaussian | n/a | 0.84 ± 0.05 | 0.16 ± 0.04 | 2.15 ± 0.03 | n/a | n/a | 2 | ||
| Ring | n/a | 0.84 ± 0.05 | 0.16 ± 0.04 | 2.55 ± 0.05 | n/a | n/a | 2.6 |
Notes. The flux weights 1, 2, and 3 correspond to the fractional flux contributions of the star (point source), dust (disc, Gaussian, or ring), and that of a diffuse emission when a background was added, respectively.A binary component resulted in a better fit to the visibilities (see Sect. 4.2). (a)The measured size of the reconstructed 2.2 μm images (WISARD) as a result of a 2D Gaussian fit (Appendix B). (b)When the fitting procedure resulted in a ring of 0 mas diameter, the ring width was used instead to estimate the size of the emission. (†)For ring brightness distributions this corresponds to the internal diameter of a normalised uniform ring.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.