BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Understanding the initial stages of planet-driven gap formation  
 - Amelia J. Cordwell (DAMTP)
DTSTART:20250527T120000Z
DTEND:20250527T130000Z
UID:TALK232579@talks.cam.ac.uk
CONTACT:Dr Dolev Bashi
DESCRIPTION:Gaps and rings are ubiquitous in observations of protoplanetar
 y discs\, and their existence may be attributed to (proto-)planets interac
 ting with their natal environments. However\, constraining protoplanet mas
 ses or ages - or even just confirming that protoplanets are the cause of t
 hese substructures - in any given observation requires a clear theoretical
  understanding of large numbers of different gap processes. \n\nWhile theo
 retical and semi-analytical works exist for the viscously dominated end st
 ages of gap evolution\, due to the near inviscid nature of protoplanetary 
 discs\, time-dependent theories that can account for the nature of the mut
 ual evolution between planet and disc are required to correctly interpret 
 observations.\nI will first present on how planets form gaps in the simple
 st possible case: that of a low mass planet in an two-dimensional inviscid
  isothermal disc and show new analytical theory that is able to predict th
 e initial stages of gap evolution in this case. \nUsing both Athena++ nume
 rical simulations and analytical arguments\, I will then discuss how this 
 picture is modified in the cases of viscous\, thermodynamically active\, o
 r three-dimensional discs. I will show that the treatment of disc thermody
 namics has significant effects on the planet disc interaction whereas visc
 osity - at the levels expected in protoplanetary discs - does not have a s
 ignificant impact at the early stages of gap formation. 
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
END:VEVENT
END:VCALENDAR