Fig. A.1
Spectrally dispersed interferometric observables around the Brγ line for the night 2019-06-22 (left) and 2019-06-23 (right) along the 6 UT baselines. Top row: intensity spectrum where the Br γ line is clearly visible in emission at 2.166 μm.Next 6 rows: visibility amplitudes, and lower 6: differential phases. For all observables, the continuum has been normalized to reproduce the predictions of the model of the FT data, and only the parameters related to the Brγ emission areadjusted. The best-fit model is shown in orange.
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