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SUMMARY:Early results from observing aligned vs misaligned hot Jupiters wi
 th JWST as a testbed for planet formation and migration models - Eva-Maria
  Ahrer (MPIA)
DTSTART:20250225T130000Z
DTEND:20250225T140000Z
UID:TALK227269@talks.cam.ac.uk
CONTACT:Dr Dolev Bashi
DESCRIPTION:In this talk\, I will present observations and first results o
 f six hot Jupiters with JWST NIRSpec/G395H\, which are part of two JWST pr
 ogrammes set out to test planet formation and migration predictions. \nWit
 h these programmes we will measure the atmospheric metallicities and carbo
 n-to-oxygen (C/O) ratios of a sample of misaligned and aligned hot Jupiter
 s. All hot Jupiters must have undergone migration as they are too close to
  their host star to have formed in their current orbit. We further selecte
 d our sample such that the exoplanet host stars do not allow tidal orbital
  realignment\, which means that our sample of misaligned planets have unde
 rgone high-eccentricity migration (after the disk dissipated) while our al
 igned targets migrated within the disk. These two different migration mech
 anism are predicted to result in different atmospheric composition. Hence 
 these hot Jupiters allow us to test model predictions and shed light on th
 e question whether we can infer migration scenarios from atmospheric measu
 rements. Here I will present our transmission spectra of our aligned and m
 isaligned hot Jupiters\, show preliminary results and discuss current limi
 tations when it comes to comparing C/O ratio and metallicity with predicti
 ons from planet formation and migration models.
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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