Models of Pluto's upper atmosphere

Details Models of Pluto's upper atmosphere Models of Pluto's upper atmosphere

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16.1225m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Nov. 1989, p. 1225-1228.

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26

Atmospheric Composition, Atmospheric Models, Pluto Atmosphere, Upper Atmosphere, Atmospheric Temperature, Carbon Monoxide, Methane

Scientific paper

Best guesses as to the thermal structure and composition of Pluto's atmosphere have led to speculations of substantial loss rates of methane from the planet over cosmogonic time scales. Results from recent stellar occultation measurements, and using a Parker-type hydrodynamic calculation, show that the loss rates may actually be lower by as much as a factor of about 5, depending upon the efficiency of heating of the atmosphere via the absorption of solar EUV and upon the true atmospheric composition, if the thermal structure of the upper atmosphere is properly taken into account. The loss rate may even be less (by another factor of about 10) if there is minimal heating of the upper atmosphere.

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