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SUMMARY:Planets Within and Around Binary Stars: Extremophiles of Planet Fo
 rmation - Roman Rafikov (DAMTP\, Cambridge)
DTSTART:20170202T160000Z
DTEND:20170202T170000Z
UID:TALK70196@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:About half of all stars reside in binary or higher multiplicit
 y systems. Given the ubiquity of exoplanets demonstrated to us by the Kepl
 er mission\, one should naturally ask whether and how planets\ncan form in
  stellar binary and multiple systems. In this talk I will provide an overv
 iew of the current observational status of planetary systems within and ar
 ound binaries. I will then outline the key theoretical ideas about planet 
 formation in binaries\, focussing on the planetesimal fragmentation barrie
 r (caused by the strong gravitational perturbations due to the companion) 
 as a likely bottleneck for this process. Finally\, I will present a possib
 le resolution of this issue\, which relies on the previously unrecognised 
 role of the protoplanetary disk gravity for the planetary and planetesimal
  dynamics in binaries. I will argue that planets in binaries may hold impo
 rtant clues to planet formation in general.\n\n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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