Pickup oxygen ion velocity space and spatial distribution around Mars
نویسندگان
چکیده
منابع مشابه
Pickup oxygen ion velocity space and spatial distribution around Mars
[1] We report a newly created highly parallelized global test particle model for resolving the pickup oxygen ion distribution around Mars. The background magnetic and convection electric fields are calculated using a three-dimensional multispecies magnetohydrodynamic model, which includes the effect of the Martian crustal magnetic field. In addition to photo-ionization, charge exchange collisio...
متن کاملComment on "Dayside Pickup Oxygen Ion Precipitation at Venus and Mars' Spatial Distributions, Energy Deposition, and Consequences"
The ejection of atoms and molecules from an atmosphere due to the energy deposited by plasma bombardment has been shown to play a role in the loss of species from certain planetary and satellite atmospheres. This ejection, often referred to as sputtering, can be produced by the bombarding plasma [Watson et al., 1980; McGrath and Johnson, 1987] and by locally generated "pickup ions" [e.g., Kozyr...
متن کاملMAVEN insights into oxygen pickup ions at Mars
Since Mars Atmosphere and Volatile EvolutioN (MAVEN)’s arrival at Mars on 21 September 2014, the SEP (Solar Energetic Particle) instrument on board the MAVEN spacecraft has been detecting oxygen pickup ions with energies of a few tens of keV up to ~200 keV. These ions are created in the distant upstream part of the hot atomic oxygen exosphere of Mars, via photoionization, charge exchange with s...
متن کاملThe importance of pickup oxygen ion precipitation to the Mars upper atmosphere under extreme solar wind conditions
[1] While the Mars upper atmosphere is continuously bombarded by charged particles of solar and planetary origins, the energy flux carried is often not sufficient to significantly affect the neutral atmosphere. However, we show that this is not the case during major space weather events. By applying two Mars global models—a Monte Carlo model for simulating pickup O+ precipitation at the exobase...
متن کاملThe spatial distribution of planetary ion fluxes near Mars observed by MAVEN
We present the results of an initial effort to statistically map the fluxes of planetary ions on a closed surface around Mars. Choosing a spherical shell ~1000 km above the planet, we map both outgoing and incoming ion fluxes (with energies >25 eV) over a 4month period. The results show net escape of planetary ions behind Mars and strong fluxes of escaping ions from the northern hemisphere with...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2008
ISSN: 0148-0227
DOI: 10.1029/2007ja012736