Stellar flybys in protoplanetary discs

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• Vasundhara Prasad / IoA
• Wednesday 19 February 2025, 13:15-13:40
• The Hoyle Lecture Theatre + Zoom .

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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.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Seminars
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla
• The Hoyle Lecture Theatre + Zoom

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