4 papers
Using observations of escaping H/He to constrain the atmospheric composition of sub-Neptunes
James G. Rogers, James E. Owen, Ethan Schreyer +1
The internal composition of sub-Neptunes remains a prominent unresolved question in exoplanetary science. We present a technique to place constraints on envelope mean molecular wei…
The First Dedicated Survey of Atmospheric Escape from Planets Orbiting F Stars
Morgan Saidel, Shreyas Vissapragada, Heather Knutson +9
Hydrodynamic escape can strip the envelopes of close-in exoplanets, but most observations of atmospheric mass loss to date have been confined to planets orbiting K and M dwarfs. A…
Observational Signatures of Circumstellar Gas Tori Formed by Planetary Mass-Loss from Close-In Exoplanets
Ethan Schreyer, Ruth Murray-Clay
Close-in exoplanets with H/He atmospheres often undergo hydrodynamic escape. In extreme cases, it is hypothesized that the mass loss can be high enough for the escaping planetary m…
Using Lyman- transits to constrain models of atmospheric escape
Ethan Schreyer, James. E. Owen, R. O. Parke Loyd +1
Lyman- transits provide an opportunity to test models of atmospheric escape directly. However, translating observations into constraints on the properties of the escaping atmos…