Impact-driven supply of sodium and potassium to the atmosphere of Mercury

Details Impact-driven supply of sodium and potassium to the atmosphere of Mercury Impact-driven supply of sodium and potassium to the atmosphere of Mercury

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...75..156m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 75, July 1988, p. 156-170.

Other

62

Atmospheric Composition, Mercury Atmosphere, Meteoritic Damage, Potassium, Sodium Vapor, Abundance, Hypervelocity Impact, Vaporizing, Velocity Distribution

Scientific paper

The Mercury atmosphere is supplied with sodium atoms from both impacting meteoroids and the impacted regolith; the production of vaporized sodium due to such impact varies with the instantaneous distance of Mercury from the sun, in a way that differs from the distance-dependence of those source-and-sink processes driven by solar radiation. Such impact-driven vaporization will yield the Na/K ratio noted in the Mercury atmosphere only if both the meteoroids and the regolith of the planet are deficient in K relative to other solar system objects sampled, other than comets.

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