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Non-detection of Helium in the Upper Atmospheres of Three Sub-Neptune Exoplanets
David Kasper, Jacob L. Bean, Antonija Oklopčić +5
We present a search for helium in the upper atmospheres of three sub-Neptune size planets to investigate the origins of these ubiquitous objects. The detection of helium for a low…
Coupled Thermal and Compositional Evolution of Photo Evaporating Planet Envelopes
Isaac Malsky, Leslie A. Rogers
Photo-evaporative mass loss sculpts the atmospheric evolution of tightly-orbiting sub-Neptune-mass exoplanets. To date, models of the mass loss from warm Neptunes have assumed that…
The Habitable Exoplanet Observatory (HabEx) Mission Concept Study Final Report
B. Scott Gaudi, Sara Seager, Bertrand Mennesson +183
The Habitable Exoplanet Observatory, or HabEx, has been designed to be the Great Observatory of the 2030s. For the first time in human history, technologies have matured sufficient…