Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...30..413e&link_type=abstract
Icarus, vol. 30, Feb. 1977, p. 413-421.
Astronomy and Astrophysics
Astronomy
10
Ice, Refractivity, Saturn Rings, Semiconductors (Materials), Sulfur Compounds, Astronomical Models, Enstatite, Iron Compounds, Optical Properties, Pyrrhotite, Troilite
Scientific paper
Optical complex refractive indices for the iron-sulfur semiconductors troilite and pyrrhotite have been measured between 0.3 and 1.1 microns as well as at 1.5 and 3.0 cm in the microwave region. The behavior of the absorptive and refractive components of the index in the visual and ultraviolet regions suggests a reasonable match to published data on Saturn's rings. A combination of the iron-sulfur with water ice and the orthopyroxene enstatite is consistent with an equilibrium condensation model for the formation of the solar system; the water ice and an orthopyroxene are also suggested by near-infrared observational data. A combination of these materials could explain all spectral features seen in the ring spectra to date. The microwave behavior of a small quantity of troilite embedded in water ice at low temperatures is consistent with the radar-reflectivity and radio-emissivity data.
Egan Walter G.
Hilgeman Theodore
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