[Astro] [CAPT] Astro seminar Hannah Wakeford (Bristol) -- Wed 5 May 15:45 C4

[Luke Conaboy (staff)]

Hi all,

we'll start the seminar 15m later at 16:00, so that those who want to attend the School colloquium can do so. If there are any problems with the shifted start time, let me know.

Best,
Luke

> On 5 May 2026, at 09:38, Luke Conaboy (staff) <Luke.Conaboy at nottingham.ac.uk> wrote:
> 
> Hi all,
> 
> this week our seminar is given by Hannah Wakeford (Bristol), details below. The seminar will be in C4, followed by wine and cheese.
> 
> Timings are as usual:
> 
> - lunch at Portland, leaving CAPT ~12:30 (subsidised for a limited number of students -- let me know)
> - meet the speaker for postgrads at 15:00, finishing at 15:30
> - seminar at 15:45 in C4
> - post-seminar wine and cheese at 16:45
> 
> Best,
> Jesse, Luke and Tutku
> 
> ==
> 
> The Climate and Chemistry of Exoplanets with Hubble and JWST
> 
> In the short time since the start of JWST’s science operations, it has caused a paradigm shift in the information and understanding of giant planet atmospheres. The spectroscopic IR capabilities have revealed absorption from H2O, CO2, and CO with exquisite precision, provided the first look at elusive methane absorption, and shown a diversity of photochemistry and disequilibrium processes at play in giant planet atmospheres. Previously obscuring aerosols that plagued UV-optical spectra are revealing themselves via distinct absorption and emission in the mid-IR confirming for the first time in irradiated exoplanets theoretical predictions of cloud formation. But JWST alone cannot fully constrain the atmospheric complexity of exoplanets. In this talk I will show how Hubble and JWST are needed to work together to understand these exotic atmosphere and I will present a case study of one such planet which is revealing the roles of clouds and chemistry in exoplanet atmospheres and the feedback imparted between composition, dynamics, and detectability.
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