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SUMMARY:Core feedback inside gravitational instability planets: explaining
  the ALMA dust gaps - Jack Humphries (Leiceister)
DTSTART:20190211T140000Z
DTEND:20190211T150000Z
UID:TALK115450@talks.cam.ac.uk
CONTACT:Dr William Béthune
DESCRIPTION: In the gravitational instability (GI) theory of planet format
 ion\, planets form through the fragmentation of young\, massive discs. Aft
 er formation\, these planets migrate\, open gaps and accrete gas and dust.
  This leads to a diverse zoo of outcomes that the GI community are attempt
 ing to constrain. \n\n\nIn this talk I’ll provide an overview of the the
 ory and summarise some of the main findings in recent years. I will then o
 utline my research into how GI planets interact with dust in the disc. The
  accretion of dust has important implications for the metallic composition
  and rocky core formation inside GI fragments. We have found that feedback
  from core growth has the potential to unbind fragments completely\, openi
 ng up a new formation channel for sub-Jupiter mass planets at tens of AU. 
 This result may provide a crucial clue in explaining the gaps in young pro
 toplanetary dust discs observed by ALMA. If such core feedback occurs freq
 uently\, it will dramatically alter the observational predictions of GI as
  a planet formation mechanism.
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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