Spectroscopic determination of the phase composition and temperature of nitrogen ice on Triton

Details Spectroscopic determination of the phase composition and temperature of nitrogen ice on Triton Spectroscopic determination of the phase composition and temperature of nitrogen ice on Triton

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993sci...261..751t&link_type=abstract

Science (ISSN 0036-8075), vol. 261, no. 5122, p. 751-754.

Computer Science

31

Phase Stability (Materials), Phase Transformations, Solid Nitrogen, Surface Temperature, Triton, Atmospheric Composition, Infrared Spectroscopy, Spectral Bands, Temperature Dependence, Neptune, Satellites, Triton, Spectroscopy, Phases, Composition, Ice, Temperature, Nitrogen, Surface, Thermal Effects, Deposits, Spectra, Carbon Monoxide, Earth-Based Observations, Absorption, Wavelengths, Infrared, Laboratory Studies, Procedure, Comparison, Parameters, Model

Scientific paper

Laboratory spectra of the first overtone band (2.1480 microns, 4655.4 reciprocal cm) of solid nitrogen show additional structure at 2.1618 microns (4625.8 reciprocal cm) over a limited temperature range. The spectrum of Neptune's satellite Triton shows the nitrogen overtone band as well as the temperature-sensitive component. The temperature dependence of this band may be used in conjunction with ground-based observations of Triton as an independent means of determining the temperature of surface deposits of nitrogen ice. The surface temperature of Triton is found to be 38.0 +2.0 or -1.0 K, in agreement with previous temperature estimates and measurements. There is no spectral evidence for the presence of alpha-nitrogen on Triton's surface, indicating that there is less than 10 percent carbon monoxide in solid solution with the nitrogen on the surface.

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