Exotic circumbinary discs in misaligned systems

Circumbinary discs are often thought to be coplanar with the binary orbital plane. However, recent observations have revealed a few systems with significant misalignment between the binary and the disc. Recent theoretical studies explored under which conditions a misaligned circumbinary disc can become polar (Zanassi & Lai 2018). Here, we present 3D Smoothed Particle Hydrodynamics (SPH) simulations for different (aligned and misaligned) scenarios. In particular, considering an initially misaligned disc, we focus on the resulting disc alignment and its structure. This is then compared with discs that have the same final orientation but that have not experienced any alignment. Finally, we provide some clues about how planet formation might proceed in these exotic systems.