Hodyss, Robert and Parkinson, Christopher D. and Johnson, Paul V. and Stern, Julie V. and Goguen, Jay D. and Yung, Yuk L. and Kanik, Isik (2009) Methanol on Enceladus. Geophysical Research Letters, 36 (17). L17103. ISSN 0094-8276 http://resolver.caltech.edu/CaltechAUTHORS:20091013-093452305
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Near infrared spectra of the surface of Enceladus returned by Cassini show the presence of an absorption feature at 3.53 μm, ascribed by Brown et al. (2006) to “short chain organics,” and by Newman et al. (2007) 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.
|Additional Information:||©2009 American Geophysical Union. Received 26 May 2009; accepted 11 August 2009; published 15 September 2009. This work was performed at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA). YLY was supported by NASA grant NNG06GF33G to the California Institute of Technology. Financial support through JPL's Research and Technology Development program is gratefully acknowledged. We thank Bonnie Buratti and James Bauer (JPL) for providing the Cassini VIMS data, and Arthur L. Lane (JPL) for useful discussions.|
|Classification Code:||6020 Planetary Sciences: Comets and Small Bodies: Ices; 6280 Planetary Sciences: Solar System Objects: Saturnian satellites; 6045 Planetary Sciences: Comets and Small Bodies: Physics and chemistry of materials|
|Official Citation:||Hodyss, R., C. D. Parkinson, P. V. Johnson, J. V. Stern, J. D. Goguen, Y. L. Yung, and I. Kanik (2009), Methanol on Enceladus, Geophys. Res. Lett., 36, L17103, doi:10.1029/2009GL039336.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||George Porter|
|Deposited On:||19 Oct 2009 00:15|
|Last Modified:||26 Dec 2012 11:28|
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