Outflow of ions from Ganymede: A reinterpretation
The cold, dense plasma in the polar magnetosphere of Ganymede has been observed to contain one species of positive ions. The usual assumption that they are protons leads to severe problems, e.g. finding an adequate ionization mechanism for hydrogen, or explaining why the expected oxygen ions are not...
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| Veröffentlicht in: | Geophysical research letters 2000-05, Vol.27 (9), p.1347-1349 |
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| container_title | Geophysical research letters |
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| creator | Vasyliūnas, Vytenis M. Eviatar, Aharon |
| description | The cold, dense plasma in the polar magnetosphere of Ganymede has been observed to contain one species of positive ions. The usual assumption that they are protons leads to severe problems, e.g. finding an adequate ionization mechanism for hydrogen, or explaining why the expected oxygen ions are not found and what happens to the oxygen. We propose that the observed ions are in fact singly charged oxygen ions rather than protons, which immediately removes all these problems. We show that the assumption of O+ instead of H+ is fully consistent with the plasma ion measurements and, by multiplying the inferred number density by 4 and speed by 1/4, brings them into better agreement with independent estimates of electron density and ion bulk flow. |
| doi_str_mv | 10.1029/2000GL003739 |
| format | Article |
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We show that the assumption of O+ instead of H+ is fully consistent with the plasma ion measurements and, by multiplying the inferred number density by 4 and speed by 1/4, brings them into better agreement with independent estimates of electron density and ion bulk flow.</description><subject>Astronomy</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Ionospheres; magnetospheres</subject><subject>Jupiter</subject><subject>Planetary, asteroid, and satellite characteristics and properties</subject><subject>Planets, their satellites and rings. 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| ispartof | Geophysical research letters, 2000-05, Vol.27 (9), p.1347-1349 |
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| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Access via Wiley Online Library; Wiley-Blackwell AGU Digital Library; Wiley Online Library (Open Access Collection) |
| subjects | Astronomy Earth, ocean, space Exact sciences and technology Ionospheres magnetospheres Jupiter Planetary, asteroid, and satellite characteristics and properties Planets, their satellites and rings. Asteroids Solar system |
| title | Outflow of ions from Ganymede: A reinterpretation |
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