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A self‐consistent model of the Jovian auroral thermal structure
A one-dimensional (1-D) model coupling a two-stream electron transport model of energy deposition with a 1-D thermal conduction model has been developed. It is applied to investigate the links…
Cassini Ion and Neutral Mass Spectrometer: Enceladus Plume Composition and Structure
INMS data indicate that the atmospheric plume and coma are dominated by water, with significant amounts of carbon dioxide, an unidentified species with a mass-to-charge ratio of 28 daltons (either carbon monoxide or molecular nitrogen), and methane.
Abundant molecular oxygen in the coma of comet 67P/Churyumov–Gerasimenko
The observations indicate that the O2/H2O ratio is isotropic in the coma and does not change systematically with heliocentric distance, which suggests that primordial O2 was incorporated into the nucleus during the comet’s formation, which is unexpected given the low upper limits from remote sensing observations.
Magnetospheric energization by interaction between planetary spin and the solar wind
If the solar wind is capable of driving magnetospheric convection, then solar-wind flow past any spinning, magnetized planet with a conducting ionosphere must cause the magnetic field lines in the…
Cassini finds molecular hydrogen in the Enceladus plume: Evidence for hydrothermal processes
The Ion Neutral Mass Spectrometer onboard the Cassini spacecraft is used to detect molecular hydrogen in the plume of escaping material on Enceladus, finding that the most plausible source of this hydrogen is ongoing hydrothermal reactions of rock containing reduced minerals and organic materials.
The ionosphere as a fully adequate source of plasma for the Earth's magnetosphere
A series of recent measurements of the outflow of ionization from the ionosphere have further heightened our awareness of the strength of the ionospheric source of magnetospheric plasmas. In this…
Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature
Direct measurements of N2 by instruments aboard the Rosetta spacecraft provide clues about the comet’s long history and depletion of molecular nitrogen at levels that are depleted compared to those in the primordial solar system suggests that the comet formed at low-temperature conditions below ~30 kelvin.
Ion Neutral Mass Spectrometer Results from the First Flyby of Titan
The Cassini Ion Neutral Mass Spectrometer (INMS) has obtained the first in situ composition measurements of the neutral densities of molecular nitrogen, methane, molecular hydrogen, argon, and a host…
INMS-derived composition of Titan's upper atmosphere: Analysis methods and model comparison
Jupiter's main auroral oval observed with HST-STIS
 An extended series of FUV images obtained on 7 days during winter 2000–2001, with fixed pointing, yielded highly accurate tracking of emisson features as Jupiter rotated. They provided newly…