| Autor: |
Vervack RJ Jr; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA. Ron.Vervack@jhuapl.edu, McClintock WE, Killen RM, Sprague AL, Anderson BJ, Burger MH, Bradley ET, Mouawad N, Solomon SC, Izenberg NR |
| Jazyk: |
angličtina |
| Zdroj: |
Science (New York, N.Y.) [Science] 2010 Aug 06; Vol. 329 (5992), pp. 672-5. Date of Electronic Publication: 2010 Jul 15. |
| DOI: |
10.1126/science.1188572 |
| Abstrakt: |
During MESSENGER's third flyby of Mercury, the Mercury Atmospheric and Surface Composition Spectrometer detected emission from ionized calcium concentrated 1 to 2 Mercury radii tailward of the planet. This measurement provides evidence for tailward magnetospheric convection of photoions produced inside the magnetosphere. Observations of neutral sodium, calcium, and magnesium above the planet's north and south poles reveal altitude distributions that are distinct for each species. A two-component sodium distribution and markedly different magnesium distributions above the two poles are direct indications that multiple processes control the distribution of even single species in Mercury's exosphere. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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