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SUMMARY:Interior dynamics of tidally locked super-Earths - Dr. Tobias Meie
 r\, University of Oxford
DTSTART:20231010T120000Z
DTEND:20231010T130000Z
UID:TALK206878@talks.cam.ac.uk
CONTACT:Matthew Hooton
DESCRIPTION:Many super-Earths are very close to their host star and are th
 erefore likely to be tidally locked. Tidally locked super-Earths experienc
 e intense solar heating on their permanent dayside\, while the nightside s
 urface can reach extremely cold temperatures. In this presentation\, I wil
 l show how this extreme contrast between the dayside and nightside surface
  temperature influences the mantle dynamics of rocky super-Earths. I will 
 first discuss the case of super-Earth GJ 486b\, for which it is not known 
 whether this planet was able to retain an atmosphere are not. Subsequently
 \, I will present results for super-Earths that experience stellar irradia
 tion high enough to harbour a magma ocean\, such as 55 Cancri e or K2-141b
 . When the planet’s dayside is covered by a thick magma ocean\, our simu
 lations reveal the formation of a hot super-plume that ascends towards the
  magma ocean which could facilitate the recycling of material between the 
 nightside and dayside. Given the undergoing observations of these planets 
 by JWST\, understanding the interplay between the planet’s atmosphere\, 
 magma ocean\, and underlying solid mantle becomes particularly crucial. 
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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