DPS Meeting, Madison, October 1998
Session 44. Uranian and Other Satellites
Contributed Oral Prarllel Session, Thursday, October 15, 1998, 4:00-5:00pm, Madison Ballroom C

[Previous] | [Session 44] | [Next]

[44.03] Temperature Sensitivity of the Near-Infrared Spectrum of Water Ice: Application to Icy, Outer Solar System Surfices

W. M. Grundy, M. W. Buie, J. R. Spencer, J. A. Stansberry (Lowell Obs.), B. Schmitt (CNRS/LGGE), C. Dalla Piazza (Lycoming Col.), B. N. Hilbert (Boston Univ.)

We have obtained spectra of a large sample of outer solar system objects using the OSIRIS spectrometer, covering the wavelength range from 1.2 to 2.3~\mum. Our spectra of many of the solid objects exhibit near-IR absorptions bands characteristic of low-temperature, crystalline water ice. These objects include satellites of Jupiter, Saturn, and Uranus, as well as the rings of Saturn. We make use of new H2O ice optical constants [Grundy and Schmitt 1998 {\it J.\ Geophs.\ Res.} in press.] to analyze our spectra to determine the physical state and temperature of H2O ice at the surfaces of these objects.

We will present the technique we have developed for determining temperatures of ice-rich surfaces from near-IR spectra, and will discuss limitations of this technique which result from effects such as multiple scattering, radiation damage, and the presence of hydrated impurities. Under some circumstances, these effects can result in errors in the derived temperature.

We will also discuss the application of our technique to remote sensing of temperature changes, which are less vulnerable to errors resulting from the effects listed above.

If you would like more information about this abstract, please follow the link to http://www.lowell.edu/users/grundy/public/ice.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

[Previous] | [Session 44] | [Next]