Vibrationally excited H2 in the upper atmosphere of Saturn

Tariq Majeed, John C. McConnell, Roger V. Yelle

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We have considered the impact of resonance fluorescense of solar EUV radiation by H2 on the distribution of the vibrational levels of H2 in the upper atmosphere of Saturn. This source has not been considered to date. It appears that, for v ≥ 3, this is the most important source, more important than those due to photoelectron induced fluorescence, recombination of molecular ions such as H3+, and vibrational excitation of H2 by photoelectron impact. Based on the Voyager limb observations of H2 band emission we estimate that some of the higher vibrational levels may have effective temperatures ∼ 3500 K. Such high vibrational densities may have an impact on ionospheric densities.

Original languageEnglish (US)
Pages (from-to)131-134
Number of pages4
JournalAdvances in Space Research
Issue number1
StatePublished - 1990

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • General Earth and Planetary Sciences


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