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SUMMARY:A systematic exploration of magnetized winds solutions in protopla
 netary discs - Geoffroy Lesur - University of Grenoble
DTSTART:20201102T140000Z
DTEND:20201102T150000Z
UID:TALK151510@talks.cam.ac.uk
CONTACT:Cleo Loi
DESCRIPTION:The recent developments in our understanding of the chemical c
 omposition\, the ionisation equilibrium and the dynamics of protoplanetary
  discs has led to the conclusion that magnetised disc wind (MDW) are proba
 bly playing an important role in shaping the long term evolution of these 
 objects. Most of our understanding of these winds comes from complex globa
 l direct numerical simulations which include detailed microphysics and whi
 ch explore only a very limited subspace of parameters. Hence\, it is very 
 difficult to draw firm conclusions about the nature of MDWs\, their proper
 ty\, and the long-term evolution of discs subject to MDWs. In this talk\, 
 I will present a systematic exploration of MDW solutions\, using a simplif
 ied self-similar approach\, which can then be used in secular models to pr
 edict the evolution of a disc\, in a way similar to the "alpha disc" model
 . I will also discuss the solutions topology (top/down symmetry\, midplane
 /surface accretion layers\, laminar stress\, etc...) which have often been
  mis-interpreted in the literature.
LOCATION:Online
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