Mercury's atmosphere - A perspective after Mariner 10

Details Mercury's atmosphere - A perspective after Mariner 10 Mercury's atmosphere - A perspective after Mariner 10

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...28..579k&link_type=abstract

Icarus, vol. 28, Aug. 1976, p. 579-591.

Computer Science

9

Atmospheric Composition, Mercury (Planet), Planetary Atmospheres, Abundance, Argon, Helium, Mariner 10 Space Probe, Outgassing, Planetary Crusts, Solar Wind

Scientific paper

Implications of Mariner 10 observations are discussed regarding the composition and structure of Mercury's atmosphere as well as its interaction with the solar wind. The Mariner 10 data cited indicate that Mercury's atmosphere is apparently similar to that on the moon. It is shown that helium could be supplied to the atmosphere either by the radioactive decay of uranium and thorium in the planetary crust or by accretion of a small fraction of the solar-wind flux. It is noted that the absence of argon could be explained by a potassium-deficient crust, but this conclusion is by no means firm. Upper limits for outgassing of H2O and CO2 are estimated which suggest that either the planet is deficient in volatiles or is relatively inactive in comparison with earth.

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