Interferometric observations of the circumstellar disk environments in close binary stars

The inner structure of protoplanetary disks can be strongly affected by the presence of the companion in close binary stars with ~au separation, where the dispersal of the circumstellar components may occur over time scales as short as 10000 yrs. The interferometric view helps us to understand better the disk-binary interaction in such systems. We present multi epoch interferometric observations of disks in close binaries based on VLTI-MIDI (mid-IR), AMBER and GRAVITY (near-IR) data in the continuum, combined with photometric measurements. The optimization of temperature gradient models based on Markov Chain Monte Carlo simulations suggests the presence of hot dust within the circumbinary cavity for at least two of our studied objects, the ~7 au Herbig V892 Tau and the ~1 au T Tauri WW Cha at an age of ~2 Myr. In the latter case, our findings are consistent with circumstellar dust surrounding each of the binary components. Such studies are a good test-bench for theoretical models that predominantly predict rapid disrupting of the circumstellar disks.