Physics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9012345m&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Dec. 10, 1985, p. 12,345-12,379. NASA-supported research.
Physics
60
Albedo, Calderas, Io, Satellite Surfaces, Volcanoes, Infrared Imagery, Reflectance, Temperature Distribution, Thermal Emission, Voyager 1 Spacecraft
Scientific paper
In the present investigation, it is shown that a one-to-one correspondence exists on Io between hot spots and features with normal albedos less than or equal to 0.3 (in the Voyager orange filter). It is pointed out that the hot spots are a manifestation of the prolific volcanic activity and heat flow of Io, widely believed to be due to dissipation of tidal energy resulting from the forward eccentricity of Io's orbit and the tides raised by Jupiter. All of the hot spots identified by the Voyager 1 infrared interferometric spectrometer (IRIS) correspond to relatively low-albedo features. An approach has been developed to identify hot spots not included in the IRIS inventory and to model their temperatures. The spectral reflectivities of the low-albedo features, extracted from the multispectral mosaics produced by Soderblom et al. (1985), are also presented, and compared to the laboratory spectra of a variety of candidate materials.
Johnson Torrence V.
Matson Dennis L.
McEwen Alfred S.
Soderblom Larry A.
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