Atmospheric escape from Titan

Details Atmospheric escape from Titan Atmospheric escape from Titan

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.338..263b&link_type=abstract

In ESA, Symposium on Titan p 263-265 (SEE N92-32348 23-91)

Astronomy and Astrophysics

Astrophysics

2

Atmospheric Composition, Missing Mass (Astrophysics), Nitrogen, Planetary Ionospheres, Planetary Mass, Satellite Atmospheres, Titan, Hydrogen, Solar Wind, Toruses

Scientific paper

The mass loss from Titan's atmosphere by different escape processes is reviewed with emphasis on its principal constituent, N2. The highly efficient escape of hydrogen is evidenced by the observed hydrogen torus on the Saturn system, having its origin in Titan's atmosphere. Atmospheric escape of atomic nitrogen is also considered. This happens as the result of impact ionization by magnetospheric electrons, dissociative recombination in Titan's ionosphere, and interactions with the magnetosphere/solar wind which now leads to estimates for the mass loss (over 4.5 B yrs) considerably below the originally assumed 10 percent of the present atmospheric mass; an upper limit for the mass loss of N now appears to be even less than 1 percent of the present atmospheric mass.

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