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SUMMARY:Turbulence\, pebbles and planetesimals : the origin of minor bodie
 s in the Solar System - Hubert Klahr (Max Planck Institute for Astronomy)
DTSTART:20231120T140000Z
DTEND:20231120T150000Z
UID:TALK206416@talks.cam.ac.uk
CONTACT:Roger Dufresne
DESCRIPTION:“Without turbulence - no planets - no Solar System - no life
  on Earth.”\n\nThe Solar System’s minor bodies\, asteroids\, trojans\,
  comets and Kuiper belt objects\, are leftover planetary building blocks c
 alled planetesimals. The largest of these planetesimals grew into planets 
 through collisions and the accretion of large grains called pebbles. Despi
 te their importance we still do not know where and when they were born in 
 the solar nebula. \n\nHere I report on our numerical experiments connectin
 g three stages of planetesimal formation 1.) the evolution of the dust siz
 e distribution in the turbulence of a circumstellar disk\, 2.) concentrati
 on and diffusion of pebbles in geostrophic flow features as vortices and z
 onal flows and 3.) the gravitational collapse of pebble clouds into cluste
 rs of planetesimals.\n\nWith our ongoing project we aim to calibrate the p
 lanetesimal formation process against observational and laboratory data fo
 r minor bodies in the Solar System\, allowing to reconstruct the turbulenc
 e during the birth of the Solar System and connecting our home world to th
 e diversity of exoplanets.
LOCATION:MR14 DAMTP and online
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