Hostname: page-component-77c89778f8-7drxs Total loading time: 0 Render date: 2024-07-19T16:18:23.246Z Has data issue: false hasContentIssue false
  • English
  • Français

Exospheric temperature of Venus from Mariner 5

Published online by Cambridge University Press:  14 August 2015

Charles A. Barth
Charles A. Barth*
Affiliation:
Dept. of Astro-Geophysics and Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colo., U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The Lyman alpha measurements made on the sunlit side of Venus by Mariner 5 showed that the distribution of the radiating hydrogen atoms was governed by two scale heights. A revised model is presented in which the inner or cold distribution is attributed to hydrogen atoms in thermal equilibrium with the thermosphere and the outer or hot distribution is due to hydrogen atoms produced by the photodissociation of molecular hydrogen. The consequence of this interpretation is that the temperature of the dayside thermosphere of Venus is 325 K.

Type
Part I: Venus
Information
Symposium - International Astronomical Union , Volume 40: Planetary Atmospheres , 1971 , pp. 17 - 22
Copyright
Copyright © Reidel 1971 

References

Barth, C. A.: 1968, ‘Interpretation of the Mariner 5 Lyman Alpha Measurements’, J. Atmospheric Sci. 25, 564.Google Scholar
Barth, C. A., Wallace, L., and Pearce, J. B.: 1968, ‘Mariner 5 Measurement of Lyman Alpha Radiation Near Venus’, J. Geophys. Res. 73, 2541.Google Scholar
Dalgarno, A. and Allison, A. C.: 1969, ‘Photodissociation of Molecular Hydrogen on Venus’, J. Geophys. Res. 74, 4178.Google Scholar
Hinteregger, H. E., Hall, L. A., and Schmidtke, G.: 1965, ‘Solar XUV Radiation and Neutral Particle Distribution in July 1963 Thermosphere’, Space Res. 5, 1175.Google Scholar
Lewis, John S.: 1968, ‘An Estimate of the Surface Conditions of Venus’, Icarus 8, 434.Google Scholar
Lewis, John S.: 1970, ‘Geochemistry of the Volatile Elements on Venus’, Icarus 11, 367.CrossRefGoogle Scholar
Mentall, J. E. and Gentieu, E. P.: 1969, ‘Lyman-α Fluorescence From the Photodissociation of H2‘, GSFC X-616–69–497.Google Scholar
Stecher, , Theodore, P. and Williams, David A.: 1969, ‘Photo-destruction of Hydrogen Molecules in H1 Regions’, Astrophys. J. 149, L29.CrossRefGoogle Scholar