Discovery of Sodium in the Atmosphere of Mercury
- 16 August 1985
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 229 (4714), 651-653
- https://doi.org/10.1126/science.229.4714.651
Abstract
The spectrum of Mercury at the Fraunhofer sodium D lines shows strong emission features that are attributed to resonant scattering of sunlight from sodium vapor in the atmosphere of the planet. The total column abundance of sodium was estimated to be 8.1 x 1011 atoms per square centimeter, which corresponds to a surface density at the subsolar point of about 1.5 x 105 atoms per cubic centimeter. The most abundant atmospheric species found by the Mariner 10 mission to Mercury was helium, with a surface density of 4.5 x 103 atoms per cubic centimeter. It now appears that sodium vapor is a major constituent of Mercury's atmosphere.Keywords
This publication has 8 references indexed in Scilit:
- Mariner 10: Mercury atmosphereGeophysical Research Letters, 1976
- Mercury's atmosphere: A perspective after Mariner 10Icarus, 1976
- A model for Io's atmosphere and sodium cloudThe Astrophysical Journal, 1975
- Mercury's helium exosphereJournal of Geophysical Research, 1975
- The atmosphere and ionosphere of IoThe Astrophysical Journal, 1975
- A New Upper Limit for an Atmosphere of CO_{2}, CO on MercuryThe Astrophysical Journal, 1974
- A Search for an Atmosphere on MercuryThe Astrophysical Journal, 1967
- Rocket measurements of the sodium dayglowJournal of Geophysical Research, 1967