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SUMMARY:What do we actually know about planet migration? - Amelia Cordwell
  (DAMTP Cambridge)
DTSTART:20251120T123000Z
DTEND:20251120T133000Z
UID:TALK240511@talks.cam.ac.uk
CONTACT:Mika Kontiainen
DESCRIPTION:Planets embedded in protoplanetary discs are predicted (classi
 cally) to migrate inward on timescales faster than the disc lifetime. This
  naively would imply that the vast majority of planets created are accrete
 d into their host star — a problematic assumption given that planets exi
 st.\n\nI will present an overview of different migration models and attemp
 t to establish what we do and don’t know about different regimes. I will
  consider the classic models of Type I and Type II migration\, and show ho
 w our understanding of these has changed over the last 20 years due to the
  availability of high resolution 3D simulations\, including the fact that 
 most planets of observational interest will not neatly fit into either tra
 ditional category.\n\nI will introduce how additional disc physics (e.g. d
 ust\, inviscid dynamical effects) may change this picture. I will attempt 
 to describe where either quantitatively or qualitatively correct theory ex
 ists for different regimes\, and attempt to discuss where further research
  is required and what models are most likely to be applicable for N-Body a
 nd population synthesis works.\n\nAs much as possible\, I would like for t
 his to be an informal and interactive talk.
LOCATION:Institute of Astronomy 
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