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Explore gravitational instability as a viable planet formation mechanism in this astrophysics seminar from the Institute for Advanced Study. Examine how the discovery of widespread substructures in protoplanetary discs has reignited interest in gravitational instability theory, particularly when considering its interaction with dust dynamics. Learn about the historical context of gravitational instability in planetary formation and understand why it previously fell out of favor due to its tendency to form stellar companions rather than planets. Discover how recent research has revealed new possibilities when gravitational instability works in synergy with dust particle behavior. Investigate the formation of large-scale spiral structures through gravitational instability and their role in efficiently trapping dust particles to create regions of extremely high dust concentration. Analyze the analytical characterization of dust collapse mechanisms that can lead to the formation of Earth-mass objects, supported by numerical simulation evidence. Understand how this process enables the efficient formation of planetary cores at large orbital radii within young protostellar disc environments, offering new insights into early planet formation timescales and their alignment with protostellar disc evolution.
