Far-UV, visible, and near-IR reflectance spectra of frosts of H2O, CO2, NH3 and SO2

Details Far-UV, visible, and near-IR reflectance spectra of frosts of H2O, CO2, NH3 and SO2 Far-UV, visible, and near-IR reflectance spectra of frosts of H2O, CO2, NH3 and SO2

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47..361h&link_type=abstract

(International Astronomical Union and American Astronomical Society, Colloquium on Comets: Gases, Ices, Grains, and Plasma, 61st

Astronomy and Astrophysics

Astronomy

42

Ammonia, Carbon Dioxide, Frost, Ice, Solar System, Spectral Reflectance, Sulfur Dioxides, Carbonaceous Chondrites, Comet Nuclei, Far Ultraviolet Radiation, Near Infrared Radiation, Visible Spectrum, Comets, Ultraviolet, Infrared, Light (Visible Radiation), Reflectance, Spectrum, Frost, Water, Carbon Dioxide, Ammonia, Features, Wavelengths, Sulfur Dioxide, Volatile Elements, Comet Nuclei, Spectroscopy, Absorption, Experiments, Data

Scientific paper

Measurements in the 0.1-2.5 micron range are presented for the reflectance spectra of the frosts of several volatiles pertinent to the study of comet nuclei. The frost spectra have distinctive features permitting their identification by spectroscopic reflectance remote sensing, notably in the far UV. It is found that: (1) H2O has a minimum at 0.16 microns and a maximum at 0.13 microns; (2) CO2 has minima near 0.21, 0.18 and 0.125 microns, with maxima at 0.19, 0.135 and 0.120 microns; (3) NH3 is bright at wavelengths longer than 0.21 microns, where reflectance drops to a value of only a few per cent at shorter wavelengths; (4) SO2 has a sharp drop at 0.32 microns, with a minimum at 0.18 microns and a maximum at 0.13 microns. The features in the frost spectra largely correspond to absorption line bands in the gas phase.

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