116 citations · 859 across the 30 of their papers we have counts for
25 papers · 1 filter
Electron Impact Ionization in the Icy Galilean Satellites' Atmospheres
Shane R. Carberry Mogan, Robert E. Johnson, Audrey Vorburger +1
Electron impact ionization is critical in producing the ionospheres on many planetary bodies and, as discussed here, is critical for interpreting spacecraft and telescopic observat…
Callisto's atmosphere: First evidence for H2 and constraints on H2O
Shane R. Carberry Mogan, Orenthal J. Tucker, Robert E. Johnson +8
We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope (Roth et al. 2017a) from sublimated H2O and radiolytically produce…
The influence of upper boundary conditions on molecular kinetic atmospheric escape simulations
S. R. Carberry Mogan, O. J. Tucker, R. E. Johnson
Molecular kinetic simulations are typically used to accurately describe the tenuous regions of the upper atmospheres on planetary bodies. These simulations track the motion of part…
Lifetime of a transient atmosphere produced by Lunar Volcanism
Orenthal J. Tucker, Rosemary M. Killen, Robert E. Johnson +1
Early in the Moon's history volcanic outgassing may have produced a periodic millibar level atmosphere (Needham and Kring, 2017). We examined the relevant atmospheric escape proces…
Volatile evolution and atmospheres of Trans-Neptunian Objects
Leslie A. Young, Felipe Braga-Ribas, Robert E. Johnson
At 30-50 K, the temperatures typical for surfaces in the Kuiper Belt (e.g. Stern & Trafton 2008), only seven species have sublimation pressures higher than 1 nbar (Fray & Schmitt 2…
Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets
Apurva V. Oza, Robert E. Johnson, Emmanuel Lellouch +12
Extrasolar satellites are generally too small to be detected by nominal searches. By analogy to the most active body in the Solar System, Io, we describe how sodium (Na I) and pota…