Far-UV, visible, and near-IR reflectance spectra of frosts of H 2O, CO 2, NH 3 and SO 2
Abstract
The reflectance spectra of frosts of several volatiles of interest for comet nuclei and outer-solar-system objects have been measured over the range 0.1-2.5 μm. The spectra of all the frosts have distinctive features which could allow their identification by spectroscopic reflectance remote sensing, especially in the far uv. H 2O has a minimum at about 0.16 μmand a maximum at 0.13 μm. CO 2 is relatively bright in the far uv, with minima near 0.21, 0.18, and 0.125 μm and maxima at 9, 0.135, and 0.120 μm. NH 3 is bright at wavelengths longer than about 0.21 μm, where the reflectance drops precipitously to a value of only a few percent at shorter wavelenghts. SO 2 has a sharp drop at 0.32 μm and its spectrum remains dark at higher energies, with a minimum at 0.18 μm and a maximum near 0.13 μm. Most of the features in the frosts spectra correspond to bands of absorption lines in the gas phase.
- Publication:
-
Icarus
- Pub Date:
- September 1981
- DOI:
- 10.1016/0019-1035(81)90184-6
- Bibcode:
- 1981Icar...47..361H
- Keywords:
-
- 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