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SUMMARY:Population level study of the influence of planetesimal fragmentat
 ion on planet formation - Nicolas Kaufmann\, University of Bern
DTSTART:20231024T120000Z
DTEND:20231024T130000Z
UID:TALK207475@talks.cam.ac.uk
CONTACT:Matthew Hooton
DESCRIPTION:The size distribution of solids in the protoplanetary disk is 
 still ill constrained and evolves significantly throughout plant formation
  by various processes. As the planets grow\, they excite the mutual random
  velocities among planetesimals\, making collisions between them destructi
 ve. This leads to their fragmentation changing the typical size of solids 
 accreted by protoplanets. I will show the impact planetesimal collisional 
 fragmentation has on planet formation employing a population synthesis app
 roach. The synthesis is performed by varying the initial conditions based 
 on observations of disks to generate synthetic exoplanet populations. Our 
 results show that planetesimal fragmentation\, in conjunction with radial 
 drift and the interactions with the gas disk\, can either promote or hinde
 r planet formation\, depending on the typical size of fragments produced i
 n collisions. In addition\, the enhanced radial drift of the smaller fragm
 ents also changes the typical origin of accreted solids affecting the comp
 osition of the forming planets.
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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