Infrared speckle observations of Io - an eruption in the Loki region

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.230.4721.63· OSTI ID:5525008

Howell, R R; Mcginn, M T

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. 10 references.

• Research Organization: Hawaii Univ., Honolulu
• OSTI ID: 5525008
• Journal Information: Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 230; ISSN SCIEA
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
JUPITER PLANET
MATHEMATICAL LOGIC
PLANETS
RADIATIONS
SATELLITES
TEMPERATURE DISTRIBUTION
VOLCANOES