Seminar: Exoplanet atmospheres from the ground and from space

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• Aaron Arufe Bello, JPL
• Wednesday 21 June 2023, 14:00-15:00
• PHYW-LT (117).

If you have a question about this talk, please contact Lalitha Sairam.

JWST and new powerful ground-based spectrographs are providing us with unprecedented insights into the atmospheric composition of faraway worlds of all sizes, from puffy gas giants to small rocky planets. In this talk, I will review the two most popular and highly-complimentary techniques to probe the skies of exoplanets: ground-based high-resolution spectroscopy and space-based observations. I will present the first high-resolution spectrum of what is currently the lowest-density gas giant, HAT -P-67b. The data reveal strong absorption from various metals in the atmosphere of HAT -P-67b, as well as a time-variable hydrogen and helium signal, whose origin remains unknown but could be due to a giant tail of escaping gas of several planetary radii in size. Finally, I will show new JWST data of the iconic super-Earth 55 Cnc e, a hot rocky planet around a naked-eye star. This dataset could provide the first robust detection of an atmosphere on a rocky exoplanet.

This talk is part of the Astrophysics Talks Series series.

This talk is included in these lists:

• Astrophysics Talks Series
• Bham Talks
• PHYW-LT (117)
• What's on in Physics?

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