Oxygen Ions Observed Near Saturn's A Ring

Details Oxygen Ions Observed Near Saturn's A Ring Oxygen Ions Observed Near Saturn's A Ring

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sci...307.1260w&link_type=abstract

Science, Volume 307, Issue 5713, pp. 1260-1262 (2005).

Physics

31

Scientific paper

Ions were detected in the vicinity of Saturn's A ring by the Ion and Neutral Mass Spectrometer (INMS) instrument onboard the Cassini Orbiter during the spacecraft's passage over the rings. The INMS saw signatures of molecular and atomic oxygen ions and of protons, thus demonstrating the existence of an ionosphere associated with the A ring. A likely explanation for these ions is photoionization by solar ultraviolet radiation of neutral O2 molecules associated with a tenuous ring atmosphere. INMS neutral measurements made during the ring encounter are dominated by a background signal.

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