27 citations · 40 across the 10 of their papers we have counts for
6 papers · 1 filter
Systematic Uncertainties in Rocky Exoplanet Reflected Light from Incomplete Laboratory BRDF Measurements
Leonardos Gkouvelis, Michael K. Shepard, Paul Helfenstein +2
The first observations of short-period rocky exoplanets have initiated the era of terrestrial exoplanet characterization. The interpretation of these observations relies on forward…
Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory
Courtney D. Dressing, Danica Adams, Evelyne Alecian +324
The Habitable Worlds Observatory (HWO) is a future NASA flagship mission concept identified by the Astro2020 Decadal Survey as the highest priority for large space missions. HWO sh…
Helium-poor winds do not require helium-poor planets
Leonardos Gkouvelis, Francisco J. Pozuelos
Observations of the metastable He,{\sc i},10830,Å triplet have revealed escaping exoplanet atmospheres whose inferred helium abundances range from nearly nebular compositions to st…
Phase-curve approach to study atmospheric flows in hot Jupiters
D. Shulyak, W. Dietrich, V. Parmentier +5
Short-orbit gaseous exoplanets are the best targets to study atmospheric dynamics. A time series of emission observations collected at various photometric filters (phase curves) pr…
Global evolution of electric fields during planet encircling dust storms on Mars
Ina Taxis, Leonardos Gkouvelis, Richard A. Urata +2
Planet-encircling dust storms fundamentally reshape Martian weather and the near-surface electrostatic environment. We investigate the generation and evolution of electric fields d…
A theory of transmission spectroscopy of hydrodynamic outflows from planetary atmospheres: Spectral-line saturation and limits on mass-loss constraints
Leonardos Gkouvelis
Transmission spectroscopy is a key technique in the characterization of exoplanet atmospheres and has been widely applied to planets undergoing hydrodynamic escape. While a robust…