Detection of Ozone on Ganymede

  title={Detection of Ozone on Ganymede},
  author={K. Noll and R. E. Johnson and A. Lane and D. Domingue and H. Weaver},
  pages={341 - 343}
An absorption band at 260 nanometers on the trailing hemisphere of Ganymede, identified as the Hartley band of ozone (O3), was measured with the Hubble Space Telescope. The column abundance of ozone, 4.5 × 1016 per square centimeter, can be produced by ion impacts or by photochemical equilibrium with previously detected molecular oxygen (O2). An estimated number density ratio of [O3]/[O2] ≈ 10−4 to 10−3 requires an atmospheric density orders of magnitude higher than upper limits from spacecraft… Expand

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