Oxygen ionization rates at Mars and Venus: Relative contributions of impact ionization and charge exchange
| Autor: | Stephen S. Stahara, M. H. G. Zhang, Janet G. Luhmann, A. F. Nagy, John R. Spreiter |
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| Rok vydání: | 1993 |
| Předmět: |
Atmospheric Science
Soil Science Venus Photoionization Aquatic Science Oceanography Atmosphere of Venus Geochemistry and Petrology Ionization Earth and Planetary Sciences (miscellaneous) Electron ionization Earth-Surface Processes Water Science and Technology Physics Ecology biology Paleontology Forestry Atmosphere of Mars Mars Exploration Program Bow shocks in astrophysics biology.organism_classification Geophysics Space and Planetary Science Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics Atomic physics |
| Zdroj: | Journal of Geophysical Research: Planets. 98:3311-3318 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/92je02229 |
| Popis: | Oxygen ion production rates above the ionopauses of Venus and Mars are calculated for photoionization, charge exchange, and solar wind electron impact ionization processes. The latter two require the use of the Spreiter and Stahara (1980) gas dynamic model to estimate magnetosheath velocities, densities, and temperatures. The results indicate that impact ionization is the dominant mechanism for the production of O(+) ions at both Venus and Mars. This finding might explain both the high ion escape rates measured by Phobos 2 and the greater mass loading rate inferred for Venus from the bow shock positions. |
| Databáze: | OpenAIRE |
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