The global distribution of sulfur dioxide ice on Io, observed with OSIRIS on the W.M. Keck telescope

Details The global distribution of sulfur dioxide ice on Io, observed with OSIRIS on the W.M. Keck telescope The global distribution of sulfur dioxide ice on Io, observed with OSIRIS on the W.M. Keck telescope

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009icar..201..172l&link_type=abstract

Icarus, Volume 201, Issue 1, p. 172-181.

Physics

3

Scientific paper

We present ground based observations of Io taken with a high spatial resolution imaging spectrometer on 1 and 2 June 2006. We mapped the 1.98 and 2.12 μm absorptions of SO2 frost, across Io's surface. We analyze these data with surface reflectance modeling using the Hapke method to determine the general frost distribution. This analysis also determined a lower limit of 700 μm on the grain size for the areas of strongest absorption. We incorporate our findings of a predominantly equatorial distribution of SO2 frost, with the maps of Carlson et al. [Carlson, R.W., Smythe, W.D., Lopes-Gautier, R.M.C., Davies, A.G., Kamp, L.W., Mosher, J.A., Soderblom, L.A., Leader, F.E., Mehlman, R., Clark, R.N., Fanale, F.P., 1997. Geophys. Res. Lett. 24, 2479-2482], McEwen [McEwen, A.S., 1988. Icarus 73, 385-426] and Douté et al. [Douté, S., Schmitt, B., Lopes-Gautier, R., Carlson, R., Soderblom, L., Shirley, J., and The Galileo NIMS Team, 2001. Icarus 149, 107-132] to produce a self consistent explanation of the global distribution of SO2. We propose that the differences between the above maps is attributable, in part, to the different bands that were studied by the investigators.

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