Planet formation in multiple stellar systems, with ALMA

Nicolas Kurtovic, Paola Pinilla, Myriam Benisty, Facchini Stefano, Anna Penzlin, Laura Perez, Christian Ginski, Andrea Isella, Francois Menard, Sebastian Perez, Amelia Bayo, Sylvie Cabrit, Carolin Kimmig

Dynamical interactions between young binaries can perturb the material distribution of their circumstellar disks, modifying the planet formation process. To understand how planets form in young multiple stellar systems, we need to characterize the binary dynamics and their protoplanetary disk's properties.
From studying observations of the CSCha circumbinary disk, we show that measuring the eccentricity as a function of radii can be used as a tracer of giant planets. On the other hand, for multiple disk systems, we recovered sub-resolution astrometry of the binary RWAur, tentatively revealing a star-disk collision that happened about 300 years ago.
Our unprecedented measurements show the importance of carefully characterizing the morphology of protoplanetary disks to understand their history and planet formation potential.