Limb brightening on Uranus - The visible spectrum. II

Details Limb brightening on Uranus - The visible spectrum. II Limb brightening on Uranus - The visible spectrum. II

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...34..355p&link_type=abstract

Icarus, vol. 34, May 1978, p. 355-373. NSF-supported research

Astronomy and Astrophysics

Astronomy

2

Astronomical Photometry, Limb Darkening, Planetary Atmospheres, Uranus (Planet), Astrometry, Electrophotometers, Light (Visible Radiation), Luminous Intensity, Methane, Radial Distribution, Spectra, Photoelectric Emissions, Brightness, Albedo, Spectrum, Light (Visible Radiation), Electrophotometry, Uranus, Atmosphere, Limbs, Radial Distribution

Scientific paper

A detailed analysis is presented of photoelectric area-scanning photometry of the Uranus disk obtained during the 1976 apparition. Coarse quantitative information on the true radial intensity distribution over the Uranus disk is derived in four selected wavebands. Lack of circular symmetry in the intensity distributions indicates the presence of disk structure, especially polar brightening, in each waveband. For the 6190-A CH4 band, the distribution corresponds to a uniform disk upon which a hint of polar brightening is superimposed. For the 6400-A region, moderate limb darkening is found. It is pointed out that the coarse analytical technique used in the analysis to explore the information content of the photometric scans of Uranus has several basic limitations. Direct deconvolution of the Uranus scans is required to thoroughly investigate the two-dimensional photometric structure of its disk.

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