Physics
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985sci...230...63h&link_type=abstract
Science (ISSN 0036-8075), vol. 230, Oct. 4, 1985, p. 63-65.
Physics
25
Infrared Interferometers, Io, Speckle Patterns, Volcanoes, Algorithms, Image Reconstruction, Temperature Distribution, Jupiter, Satellites, Io, Infrared, Wavelengths, Speckle Methods, Flux, Observations, Eruptions, Loki Region, Emissions, Hot Spots, Imagery, Image Processing, Rotation, Surface, Features, Radiance, Size, Source, Temperature, Thermal Properties, Volcanism
Scientific paper
Speckle observations of Jupiter's satellite Io at a wavelength of 5 micrometers during July 1984 resolved the disk and showed emission from a hot spot in the Loki region. The hot spot contributed a flux approximately equal to 60 percent of that from the disk. Images reconstructed by means of the Knox-Thompson algorithm showed the spot moving across the disk as the satellite rotated. It was located at 301 deg + or - 6 deg west longitude, 10 deg + or - 6 deg north latitude, and had a radiance of (2.96 + or - 0.54) x 10 to the 22nd ergs/sec cm sr/A where A is the area of the spot. For an assumed temperature of 400 K, the area of the source would be 11,400 square kilometers. An active 'lava lake' similar to that seen by Voyager may be the source of the infrared emission.
Howell Robert R.
McGinn M. T.
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