6–10 Jun 2022
Europe/Copenhagen timezone

NLTE effects in the atmosphere of the ultra-hot Jupiter KELT-9b

7 Jun 2022, 09:50
20m
Talk Planetary Atmospheres Exoplanetary Atmospheres

Speaker

Dr Mitchell Young (University of Oxford)

Description

Ultra-hot Jupiters (UHJs) have become prime targets for atmospheric characterisation. KELT-9b is the hottest of the known UHJs and both hydrogen Balmer lines and metal line features have been detected in the planetary transmission spectrum. I will show how NLTE effects drive the temperature pressure structure of KELT-9b's atmosphere and that NLTE effects must be taken into account in order to reproduce the observations. I will show how our NLTE models have enabled the direct observational detection of NLTE effects in the atmosphere of KELT-9b at the position of both hydrogen and metal line features. Finally, I will show that the NLTE models further place strong constraints on velocities in the planetary atmosphere.

Primary author

Co-authors

Dr Mitchell Young (University of Oxford) Dr Denis Shulyak (Instituto de Astrofísica de Andalucía) Prof. Tommi Koskinen (University of Arizona) Dr Francesco Borsa (INAF Brera)

Presentation materials

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