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Astro Seminar

Modelling transit spectra for cloudy exo Jupiters

Speaker: Jo Barstow (Open University)
Date: Wednesday 22 July 2020
Time: 15:00
Venue: Zoom

For a large fraction of transiting hot Jupiters, spectroscopic observations contain evidence of aerosol in their atmospheres. Generally, transit spectra are interpreted using retrieval methods, which combine simple parameterised atmospheric models with a comparison algorithm such as MultiNest. The physical processes that produce cloud and haze are complex; however, in a retrieval model these phenomena must be represented using a minimal number of parameters. I will discuss the challenges of exoplanet atmosphere retrieval, with an emphasis on the different approaches to modelling cloud on hot Jupiters, and how these influence our understanding of their atmospheres.