electron-impact ionization Archives

O+2 density at Ganymede’s surface, modeled from the chemical equilibrium between ionization and recombination of O2, using the electron-impact ionization rates from Figure 2c. Photoionization is included in the sunlight region, which is shown by the terminator in orange. White numbers show modeled density values in cm−3 . For comparison, the red numbers show electron densities detected by Galileo (G8) and Juno radio occultation observations under the assumption of a uniform ionosphere (Kliore, 1998; Buccino et al., 2022). -- astro-ph.EP

Astrogeology, Atmospheres, Climate, Weather, Ganymede, Icy Worlds, Imaging & Spectroscopy, Jupiter, Space Weather & Heliophysics, Status Report

Constraining Electron-Impact Ionization of O2 Through UV Aurora Observations at Ganymede

by Keith CowingApril 16, 2026April 16, 2026

While photoionization rates of Ganymede‘s O2 dominated atmosphere are well constrained, the contribution of electron-impact ionization is rather uncertain.

electron-impact ionization

Constraining Electron-Impact Ionization of O2 Through UV Aurora Observations at Ganymede

Dinosaur-killing Asteroid Also Created A Dust Cloud That Insulated Earth, Charbroiling Cretaceous Creatures

Current Water Trapping Micro-habitats On The Surface Of Mars

Methanotrophy Under Extreme Alkalinity In A Serpentinizing System

ANDES, The High-resolution Spectrograph Oof The ELT: Simulated Performance Of The CORO Module And Overview Of The High-contrast Capabilities For Exoplanet Observations

When Polymers Meet Primitive Membranes: How Molecular Cooperation May Have Helped Life Begin