Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..828f&link_type=abstract
Astrophysical Journal, Part 1, vol. 229, Apr. 15, 1979, p. 828-845.
Astronomy and Astrophysics
Astrophysics
5
Astronomical Photometry, Atmospheric Temperature, Mars Atmosphere, Stellar Occultation, Upper Atmosphere, Electrophotometry, Light Curve, Power Spectra, Space Exploration, Tables (Data), Temperature Profiles
Scientific paper
High-quality photoelectric observations of the April 8, 1976, occultation of Epsilon Gem by Mars are analyzed which were obtained at five different observatories. Temperature profiles are derived by numerical inversion of the star's light curves and found to be in mutual agreement. This is taken as evidence for the presence of strong atmospheric waves in the Martial upper atmosphere between number densities of 10 to the 13th and 10 to the 15th per cu cm. It is estimated that the vertical wavelength is about 20 km, the horizontal wavelength is greater than 600 km, and the peak-to-peak wave amplitude is approximately 40 K. The results are shown to be qualitatively consistent with Zurek's (1976) model of thermally driven tidal modes. No compelling evidence for turbulence effects is found in the occultation data.
Elliot James L.
French Richard G.
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