The Galactic unclassified B[e] star HD 50138 - II. Interferometric constraints on the close circumstellar environment

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Table 2

VLTI/MIDI visibilities and equivalent Gaussian FWHM.

	Visibility			Gaussian equivalent FWHM (mas)
N°	8 μm	10.7 μm	13 μm	8 μm	10.7 μm	13 μm

Baselines roughly parallel to the Yudin & Evans (2001) polarization measurement
B₁	0.10 ± 0.06	0.16 ± 0.07	0.30 ± 0.12	19.1 ± 2.7	22.4 ± 2.8	22.6 ± 4.1
B₂	0.11 ± 0.06	0.17 ± 0.07	0.35 ± 0.09	19.1 ± 2.5	22.4 ± 2.6	21.1 ± 2.7
B₃	0.07 ± 0.05	0.09 ± 0.05	0.22 ± 0.06	19.7 ± 3.4	25.1 ± 3.4	24.2 ± 2.4
B₄	0.04 ± 0.04	0.09 ± 0.04	0.42 ± 0.10	22.6 ± 4.7	25.9 ± 2.4	19.5 ± 2.7
B₅	0.09 ± 0.06	0.10 ± 0.06	0.21 ± 0.09	20.4 ± 3.6	26.0 ± 3.3	26.6 ± 3.8
B₆	0.16 ± 0.03	0.30 ± 0.04	0.37 ± 0.12	20.2 ± 1.0	21.7 ± 1.3	24.4 ± 3.9

Baselines roughly perpendicular to the Yudin & Evans (2001) polarization measurement
B₇	0.61 ± 0.05	0.62 ± 0.05	0.78 ± 0.16	50.3 ± 4.3	64.8 ± 5.7	57.4 ± 26.3
B₈	0.11 ± 0.05	0.14 ± 0.06	0.35 ± 0.12	34.7 ± 3.7	43.1 ± 4.5	39.3 ± 6.6
B₉	0.54 ± 0.08	0.52 ± 0.08	0.88 ± 0.13	44.2 ± 5.4	60.1 ± 6.9	33.5 ± 24.9
B₁₀	0.51 ± 0.08	0.61 ± 0.07	0.89 ± 0.23	71.8 ± 8.0	80.3 ± 9.7	49.4 ± 46.4
B₁₁	0.12 ± 0.07	0.16 ± 0.07	0.44 ± 0.13	34.2 ± 5.1	42.1 ± 5.6	34.8 ± 6.4
B₁₂	0.53 ± 0.10	0.56 ± 0.10	0.75 ± 0.16	34.3 ± 5.2	43.2 ± 6.5	37.7 ± 14.5
B₁₃	0.30 ± 0.04	0.37 ± 0.06	0.55 ± 0.08	35.4 ± 2.2	41.9 ± 3.2	40.2 ± 5.1
B₁₄	0.05 ± 0.05	0.07 ± 0.05	0.21 ± 0.07	32.1 ± > 11.8	38.8 ± 6.1	37.4 ± 4.2

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