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What is Dust Grain Collision Velocities in Discs about?

- The collision velocities of dust grains in self-gravitating protoplanetary discs are investigated through numerical simulations to determine if planetesimal formation via direct collapse is possible. - For a single dust population, velocity perturbations from disc gravity only affect grains with Stokes numbers (St) greater than 3, while coupling to gas velocity dominates at lower St. - Relative velocities induced by radial drift in multiple dust populations are too high to allow silicate grain growth

Author

Bulma

Language

EN