Methanol on Enceladus

Details Methanol on Enceladus Methanol on Enceladus

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p42a..04h&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #P42A-04

Physics

[6020] Planetary Sciences: Comets And Small Bodies / Ices, [6060] Planetary Sciences: Comets And Small Bodies / Radiation And Chemistry, [6280] Planetary Sciences: Solar System Objects / Saturnian Satellites

Scientific paper

Near infrared spectra of the surface of Enceladus returned by Cassini show the presence of an absorption feature at 3.53 μm, which has been ascribed both to “short chain organics,” and to hydrogen peroxide. We assign this feature tentatively to methanol. Variations in the peak position of the feature suggest that methanol in the “tiger stripes” region may be segregated from the water ice, and not homogeneously distributed in the ice matrix. The photolytic destruction of methanol implies that methane or methanol itself must be continually deposited on the surface. On Enceladus, methanol may be generated photochemically from a mixed methane/water ice, or deposited from the plume itself. The variation in the concentration of methanol over the surface could be used to distinguish between these two processes.

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