Copernicus measurements of the Lyman-alpha albedo of Jupiter

Details Copernicus measurements of the Lyman-alpha albedo of Jupiter Copernicus measurements of the Lyman-alpha albedo of Jupiter

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238.1152b&link_type=abstract

Astrophysical Journal, Part 1, vol. 238, June 15, 1980, p. 1152-1159.

Astronomy and Astrophysics

Astronomy

9

Albedo, Jupiter Atmosphere, Lyman Alpha Radiation, Ultraviolet Astronomy, Astronomical Spectroscopy, Geocoronal Emissions, Oao 3, Upper Atmosphere, Jupiter, Lyman-Alpha Radiation, Albedo, Emissions, Spectrometer, Data, Comparisons, Theoretical Studies, Atmosphere, Ultraviolet, Spectrum, Wavelengths, Observations, Parameters, Absorption, Flux, Models, Reflectivity, Doppler Observations, Intensity, Voyager 1, Pioneer 10

Scientific paper

Measurements of the Lyman alpha emission of Jupiter were made at 0.06-A resolution in January and August/September 1976 with the Princeton spectrometer of Copernicus. Simultaneous measurements of the L-alpha emission of the geocorona allow the derivation of the albedo of the planet, regardless of the exact value of the exciting solar flux, and of the exact calibration factor of the instrument. Comparison of the measured albedo with previous theoretical calculations allows a determination of a total H column density above the absorbing lower boundary ranging between 2.5 x 10 to the 16th and 3.1 x 10 to the 17th/sq cm. The measured line width is consistent with this determination. There is some evidence of H column density variation on the scale of one month from Copernicus measurements, whereas comparison with other measurements (Pioneer 10 and Voyager 1) establishes without doubt a large variability of the upper atmosphere of Jupiter.

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