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Exoplanet Exploration Program Analysis Group (ExoPAG) Report to Paul Hertz Regarding Large Mission Concepts to Study for the 2020 Decadal Survey
B. Scott Gaudi, Eric Agol, Daniel Apai +36
This is a joint summary of the reports from the three Astrophysics Program Analysis Groups (PAGs) in response to the "Planning for the 2020 Decadal Survey" charge given by the Astr…
3D modeling of GJ1214b's atmosphere: formation of inhomogeneous high clouds and observational implications
Benjamin Charnay, Victoria Meadows, Amit Misra +2
The warm sub-Neptune GJ1214b has a featureless transit spectrum which may be due to the presence of high and thick clouds or haze. Here, we simulate the atmosphere of GJ1214b with…
Comparative Habitability of Transiting Exoplanets
Rory Barnes, Victoria S. Meadows, Nicole Evans
Exoplanet habitability is traditionally assessed by comparing a planet's semi-major axis to the location of its host star's "habitable zone," the shell around a star for which Eart…
3D modeling of GJ1214b's atmosphere: vertical mixing driven by an anti-Hadley circulation
Benjamin Charnay, Victoria Meadows, Jérémy Leconte
GJ1214b is a warm sub-Neptune transiting in front of a nearby M dwarf star. Recent observations indicate the presence of high and thick clouds or haze whose presence requires stron…
The Center of Light: Spectroastrometric Detection of Exomoons
Eric Agol, Tiffany Jansen, Brianna Lacy +2
Direct imaging of extrasolar planets with future space-based coronagraphic telescopes may provide a means of detecting companion moons at wavelengths where the moon outshines the p…
Detecting and Constraining N Abundances in Planetary Atmospheres Using Collisional Pairs
Edward W. Schwieterman, Tyler D. Robinson, Victoria S. Meadows +2
Characterizing the bulk atmosphere of a terrestrial planet is important for determining surface pressure and potential habitability. Molecular nitrogen (N) constitutes the larg…
Nonphotosynthetic Pigments as Potential Biosignatures
Edward W. Schwieterman, Charles S. Cockell, Victoria S. Meadows
Previous work on possible surface reflectance biosignatures for Earth-like planets has typically focused on analogues to spectral features produced by photosynthetic organisms on E…
Habitable Evaporated Cores: Transforming Mini-Neptunes into Super-Earths in the Habitable Zones of M Dwarfs
Rodrigo Luger, Rory Barnes, Eric Lopez +3
We show that photoevaporation of small gaseous exoplanets ("mini-Neptunes") in the habitable zones of M dwarfs can remove several Earth masses of hydrogen and helium from these pla…