VLA observations of the Galilean satellites

Details VLA observations of the Galilean satellites VLA observations of the Galilean satellites

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...57...93d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 57, Jan. 1984, p. 93-101.

Astronomy and Astrophysics

Astronomy

25

Brightness Temperature, Galilean Satellites, Radiant Flux Density, Radio Astronomy, Satellite Surfaces, Albedo, Astronomical Maps, Callisto, Conductive Heat Transfer, Europa, Ganymede, Io, Thermal Emission, Jupiter, Satellites, Observations, Astronomy, Io, Europa, Ganymede, Callisto, Flux, Density, Brightness, Temperature, Data, Insolation, Absorption, Radio Observations, Reflectivity

Scientific paper

Io, Europa, Ganymede, and Callisto have been observed at 2 and 6 cm with the VLA, when the Jovian system was about 4.46 AU from the earth. Flux densities and corresponding disk brightness temperatures are determined for the two wavelengths. The radio brightness temperatures are lower than in the IR, with the latter generally being consistent with the temperature derived from equilibrium with absorbed insolation. The radio temperatures are qualitatively consistent with the equilibrium temperature for fast rotating bodies, in view of the high radio reflectivity (low emissivity) determined by Ostro's (1982) radar measurements.

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