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SUMMARY:Gravitational Instability in Irradiated Protoplanetary Discs -  Ca
 t Leedham
DTSTART:20240124T131500Z
DTEND:20240124T140500Z
UID:TALK211300@talks.cam.ac.uk
CONTACT:107642
DESCRIPTION:Young protoplanetary discs are expected to be massive and self
 -gravitating. The resulting gravitational instability (GI) causes large sp
 iral structures in the disc and is a potential formation mechanism of gian
 t planets via direct collapse of overdense regions of gas. The onset of GI
  is sensitive to thermal processes in the disc. It is\, therefore\, influe
 nced by irradiation\, such as that from the central star\, which is expect
 ed to suppress the instability. However\, this is dependent on the exact i
 mplementation of heating. In this talk I will present the results of 2D hy
 drodynamic simulations comparing the outcomes of two different heating pre
 scriptions and show that a disc heated per unit area remains gravitational
 ly unstable even under high levels of irradiation.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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