Multiple misaligned outflows and warped accretion flows in the proto-multiple system Per-emb-8 and 55

ABSTRACT :
Multiple systems are the common outcome of the star formation process. The mass accretion and outflow processes are theoretically expected to be more complex compared to single systems. Per-emb-8 and 55 are a nearby young triple system. With the ALMA data, we find that the primary protostar Per-emb-8 is associated with two misaligned bipolar outflows and is surrounded by a warped disk and asymmetric infalling flows. Its 2000 au away companion, the close protobinary Per-emb-55, is associated with a bipolar outflow with its redshifted and blueshifted lobes misaligned by 90 degrees. In this presentation, I will introduce these ALMA results showing complex dynamics and structures, and discuss their possible origins, tidal interaction or turbulent environments, in this young triple system.