Physics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15...80k&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 15, Jan. 1988, p. 80-83.
Physics
16
Line Spectra, Mercury Atmosphere, Resonance Scattering, Sodium, Fine Structure, Limb Brightening, Planetary Composition, Radiative Transfer, Mercury (Planet), Resonance, Scattering, Sodium, Atmosphere, Intensity, Radiative Transfer, Theoretical Studies, Calculations, Reflectance, Optical Properties, Parameters, Procedure, Temperature, Phases
Scientific paper
The author presents the dependence of the intensity in the sodium D1 and D2 lines on the planetary phase and position on the disk. Theoretical intensities are convolved with an atmospheric point spread function with FWHM of 0arcsec.5 and 2arcsec.0 for planetary phases 60° and 90°. The author shows that although the absolute intensities are extremely dependent on seeing, the I(D2)/I(D1) ratio remains a reliable indicator of column abundance regardless of the seeing function. For a uniform distribution of sodium, limb brightening will be apparent for a seeing disk with FWHM of 0arcsec.5 but will not be apparent for a FWHM of 2arcsec.0.
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