Distributions of H 2 O and CO 2 ices on Ariel , Umbriel , Titania , and Oberon from IRTF / SpeX observations

@inproceedings{GrundyDistributionsOH,
  title={Distributions of H 2 O and CO 2 ices on Ariel , Umbriel , Titania , and Oberon from IRTF / SpeX observations},
  author={Will M Grundy and Leslie A. Young and John Spencer and Robert E. Johnson and Eliot F. Young and Marc W. Buie}
}
We present 0.8 to 2.4 μm spectral observations of uranian satellites, obtained at IRTF/SpeX on 17 nights during 2001-2005. The spectra reveal for the first time the presence of CO2 ice on the surfaces of Umbriel and Titania, by means of 3 narrow absorption bands near 2 microns. Several additional, weaker CO2 ice absorptions have also been detected. No CO2 absorption is seen in Oberon spectra, and the strengths of the CO2 ice bands decline with planetocentric distance from Ariel through Titania… CONTINUE READING

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