The thermal emission spectrum of Io and a determination of the heat flux from its hot spots

Details The thermal emission spectrum of Io and a determination of the heat flux from its hot spots The thermal emission spectrum of Io and a determination of the heat flux from its hot spots

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.3122s&link_type=abstract

Journal of Geophysical Research, vol. 86, Apr. 10, 1981, p. 3122-3128.

Astronomy and Astrophysics

Astronomy

35

Astronomical Photometry, Emission Spectra, Heat Flux, Infrared Spectroscopy, Io, Thermal Emission, Near Infrared Radiation, Temperature Distribution, Voyager Project, Jupiter, Satellites, Thermal Properties, Spectrum, Emissions, Heat Flux, Infrared, Wavelengths, Photometry, Models, Energy, Data, Temperatures, Parameters, Thermal Anomalies, Observations, Radiometry, Brightness, Io

Scientific paper

Observations of thermal emission from Io in the near infrared made during an eclipse were combined with unpublished 8- to 13-micron intermediate band photometry and a 16- to 22-micron spectrum to specify Io's emission spectrum from 2.2 to 22 microns. Models were calculated having 'hot spots' at several different temperatures superposed on a surface, the major part of which is assumed to be at the solar equilibrium temperature. It was possible to fit the entire composite spectrum with this model. It is argued that the total emission from the hot spots can be equated to the nonsolar energy input into Io. The disk-averaged heat radiated by the hot spots is found to be 180 + or 60 microwatts/sq cm = 43 + or - 14 microcalories/sq cm-sec. A possible bimodal temperature distribution of the hot spots is discussed.

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