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Probing the M Dwarf Cosmic Shoreline with JWST

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M dwarfs provide one of the most promising routes to measure the atmospheres of rocky exoplanets. However, exoplanets in orbit around M dwarfs must contend with high and prolonged XUV irradiation that can completely remove their atmospheres, raising the question of which, if any, rocky exoplanets around M dwarfs retain an atmosphere? One way to address this question is to determine whether M dwarf rocky exoplanets follow a “Cosmic Shoreline”, an extrapolation of the irradiation–escape velocity relation observed in the Solar System that separates objects with atmospheres from those without. I will present results from JWST GO 1981 that is probing the existence of an M dwarf Cosmic Shoreline through transmission spectroscopy of five rocky exoplanets around M dwarfs.

This talk is part of the Hills Coffee Talks series.

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