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Upper limit of hydrogen and helium concentrations on Titan

Published online by Cambridge University Press:  14 August 2015

Wayne E. McGovern
Wayne E. McGovern*
Affiliation:
Institute of Atmospheric Physics, The University of Arizona, Tucson, Ariz., U.S.A.

Abstract

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The satellite Titan is commonly quoted as possessing an atmosphere consisting of at least 2 × 104 cm atm of methane. Plausible additional atmospheric constituents like hydrogen and helium are assumed to have completely escaped from the satellite. However, the employment of recent techniques to the upper atmosphere of Titan permits an improved estimate of the upper limits of the hydrogen to methane and helium to methane mixing ratios existing in the lower atmosphere of Titan, namely 10−6±1 and 10−3.5±0.5.

Type
Part III: Outer Planets
Information
Symposium - International Astronomical Union , Volume 40: Planetary Atmospheres , 1971 , pp. 394 - 400
Copyright
Copyright © Reidel 1971 

References

Cadle, R. D.: 1962, ‘The Photochemistry of the Upper Atmosphere of Jupiter’, J. Atmospheric Sci. 19, 281–285.2.0.CO;2>CrossRefGoogle Scholar
Chamberlain, J. W.: 1962, ‘Upper Atmosphere of the Planets’, Astrophys. J. 136, 582–593.CrossRefGoogle Scholar
Goody, R. M.: 1964, Atmospheric Radiation, Vol. 1, Clarendon Press, Oxford, 436 pp.Google Scholar
Hinteregger, H. E., Hall, L. A., and Schmidtke, G.: 1965, ‘Solar XUV Radiation and Neutral Particle Distribution in July, 1963 Thermosphere’, Space Research 5, North-Holland Publ. Co., Amsterdam, pp. 1175–1190.Google Scholar
Kuiper, G. P.: 1952, ‘Planetary Atmospheres and Their Origin’, in The Atmospheres of the Earth and Planets, University of Chicago Press, pp. 306–405.Google Scholar
McGovern, W. E.: 1969, ‘The Primitive Earth: Thermal Models of the Upper Atmosphere for a Methane-Dominated Environment’, J. Atmospheric Sci. 26, 623–635.2.0.CO;2>CrossRefGoogle Scholar
Öpik, E. J.: 1963, ‘Selective Escape of Gases’, Geophys. J. 7, 490–509.CrossRefGoogle Scholar
Spitzer, L.: 1949, ‘The Terrestrial Atmosphere Above 300 km’, in The Atmospheres of the Earth and Planets, University of Chicago Press, pp. 211–247.Google Scholar
Strobel, D. F.: 1969a, ‘The Photochemistry of Methane in the Jovian Atmosphere’, J. Atmospheric Sci. 26, 906–911.2.0.CO;2>CrossRefGoogle Scholar
Strobel, D. F.: 1969b, private communication.Google Scholar
Wildt, R.: 1937, ‘Photochemistry of Planetary Atmospheres’, Astrophys. J. 86, 321–336.CrossRefGoogle Scholar
Zabriskie, F. R.: 1960, ‘Studies on the Atmosphere of Jupiter’, Ph.D. dissertation, Dept. of Astronomy, Princeton University, 48 pp.Google Scholar