Fluorescent Hydroxyl Emissions from Saturn's Ring Atmosphere

Details Fluorescent Hydroxyl Emissions from Saturn's Ring Atmosphere Fluorescent Hydroxyl Emissions from Saturn's Ring Atmosphere

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996sci...272..516h&link_type=abstract

Science, Volume 272, Issue 5261, pp. 516-518

Physics

34

Scientific paper

Just before Earth passed through Saturn's ring plane on 10 August 1995, the Hubble Space Telescope Faint Object Spectrograph detected ultraviolet fluorescent emissions from a tenuous atmosphere of OH molecules enveloping the rings. Brightnesses decrease with increasing distance above the rings, implying a scale height of about 0.45 Saturn radii (R_S). A spatial scan 0.28R_S above the A and B rings indicates OH column densities of about 1013 cm-2 and number densities of up to 700 cm-3. Saturn's rings must produce roughly 1025 to 1029 OH molecules per second to maintain the observed OH distribution.

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