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SUMMARY:Characterising Exoplanetary Atmospheres in High Resolution with NL
 TE Modelling - Mitch Young (Queen's University)
DTSTART:20241119T130000Z
DTEND:20241119T140000Z
UID:TALK224602@talks.cam.ac.uk
CONTACT:Dr Dolev Bashi
DESCRIPTION:The characterisation of exoplanet atmospheres is crucial to fu
 rthering our understanding of the physics that govern them. There are many
  approaches to how this can be accomplished\, with advantages and drawback
 s to each\, but common to nearly all of them is the comparison of observat
 ional data with theoretical models. The accuracy of any given characterisa
 tion is therefore dependent on theoretical model employed\, and any simpli
 fying assumptions that go into producing it. One of the more widely adopte
 d examples is local thermodynamic equilibrium (LTE). While an incredibly u
 seful simplification\, it only really applies under certain conditions\, a
 nd ignoring this constraint puts the accuracy of any characterization at r
 isk. It is therefore important to know when LTE is appropriate\, and when 
 to switch to the more physically realistic alternative\, non-local thermod
 ynamic equilibrium (NLTE)\, instead. In this talk\, I will give a brief ov
 erview of the atmospheric modelling process with a focus on NLTE and when/
 where it is important to include it\, discuss the high-resolution cross co
 rrelation (HRCC) method of atmospheric characterisation and its limits\, a
 nd compare HRCC results with those of Doppler Tomography\, an alternative 
 analysis technique for studying emission spectroscopy.
LOCATION:HCR + ONLINE - Details to be sent by email
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