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SUMMARY:Dynamics &amp\; chemistry in the youngest planet-forming discs - J
 ohn Ilee (Cambridge)
DTSTART:20171108T160000Z
DTEND:20171108T170000Z
UID:TALK87871@talks.cam.ac.uk
CONTACT:Ed Gillen
DESCRIPTION:Protoplanetary discs are one of the most extreme environments 
 in astrophysics\, spanning a huge range of temperatures and densities.  As
  such\, modelling their chemical evolution is challenging\, and has often 
 been reduced to the study of 2-dimensional\, axisymmetric discs.  However\
 , the advent of ALMA has shown that many protoplanetary discs do not confo
 rm to this axisymmetry.  In particular\, the influence of the dynamic evol
 ution of the disc on the chemical evolution has not been well studied.  In
  this talk I will discuss my work on the calculation of disc chemistry in 
 three dimensions\, including the effects of self gravitating shocks in you
 ng\, massive discs and their implications for the initial chemical conditi
 ons of more evolved\, Class II protoplanetary discs.  I will present the a
 pplication of these techniques to planet formation itself\, outlining my r
 ecent work to characterise the chemical composition of protoplanetary frag
 ments formed via gravitational instability\, finding that simple assumptio
 ns about their composition may not hold.  Finally\, I will discuss ongoing
  work assessing the effects of dynamics on the abundance of biologically-r
 elevant molecules in discs and protoplanets\, and predictions for the obse
 rvability of these objects with facilities such as ALMA and the SKA.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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