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SUMMARY:Dust gas instabilities and planet formation - Francesco Lovascio (
 Astrophysical Research Center of Lyon)
DTSTART:20231113T140000Z
DTEND:20231113T150000Z
UID:TALK206410@talks.cam.ac.uk
CONTACT:Roger Dufresne
DESCRIPTION:The question of how dust grains are able to grow past the thre
 e growth barriers has been central to the study of planet formation over t
 he past decades. Several ideas have been analysed\, from gravitational ins
 tabilities of the dust within the protoplanetary disc\, to dust clumping d
 ue to dust-gas hydrodynamic instabilities. In this talk I discuss the stre
 aming instability in the context of planet formation\, and the role vortic
 es may play in gathering dust in protoplanetary discs. The streaming insta
 bility appears strongly damped by dust size distributions\, leading to a r
 equirement for strong previous dust enrichment. Vortices may be able to pr
 ovide such an enrichment\, but dust drag instabilities may also be the cul
 prit when it comes to breaking up vortex cores. Study of 2D dusty vortices
  shows weak dust-drag instability which breaks up vortex cores\, but this 
 instability is not fast enough to prevent strong dust enrichment in vortex
  cores.
LOCATION:Streaming in MR14 and online
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