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Atmospheric Evolution in Extrasolar Planets: From Jupiters to Earths
Add to Calendar 2024-03-04T16:15:00 2024-03-04T17:15:00 UTC Atmospheric Evolution in Extrasolar Planets: From Jupiters to Earths Davey Laboratory 538
Start DateMon, Mar 04, 2024
11:15 AM
to
End DateMon, Mar 04, 2024
12:15 PM
Presented By
Shreyas Vissapragada (Harvard University)
Event Series: CEHW Seminar

Atmospheric escape has driven the long-term evolution of most known planetary atmospheres, including terrestrial planet atmospheres in our Solar System. In this talk, I will discuss the wealth of information we can learn from studying atmospheric escape in extrasolar planets. I will first discuss new frontiers in the characterization of hot Jupiter outflows: their three-dimensional morphologies are a remarkable new probe of star-planet interactions, and they also offer an unanticipated way to study planetary isotopic compositions. Next, I will introduce the idea that the hottest Neptune-sized planets are “hot Jupiters gone wrong:” multiple lines of evidence suggest that these are the exposed high-metallicity cores of gas giants that suffered catastrophic atmospheric loss. Finally, I will discuss my efforts to extend atmospheric escape observations to Earth-sized exoplanets. Using observations from space telescopes and future ground-based facilities, we will soon be able to contextualize the divergent evolutionary pathways of terrestrial planets in our own system.

Host: Kristo Ment

Seminar held in 538 Davey or please email CEHW-SEMINAR-QUESTIONS@lists.psu.edu to attend virtually.