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Stellar flybys in protoplanetary discs

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Substructures in protoplanetary discs have long been hypothesised to act as sites of planetesimal formation, where dust particles can collide and grow to macroscopic sizes. In this talk, I will consider the substructures formed when a protoplanetary disc is perturbed by an unbound stellar companion (a stellar flyby). I will present the results of 3D hydrodynamical simulations of discs after a range of flyby encounters, and employ a novel particle tracking algorithm to study the fate of dust particles in the flyby-induced rings and spirals. Our results show that stellar flybys could trigger planetesimal formation in protoplanetary discs.

This talk is part of the Institute of Astronomy Seminars series.

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