Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa42b..06c&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA42B-06
Physics
2780 Solar Wind Interactions With Unmagnetized Bodies, 5704 Atmospheres: Composition And Chemistry, 6225 Mars, 0310 Airglow And Aurora
Scientific paper
Charge exchange of solar wind with Martian exosphere has been proved to play a crucial role in the formation of Magnetic pileup boundary (MPB) observed by MGS [Chen et al., 2001]. However the question of how the Martian exosphere structure is altered by charge exchange of solar wind quantitatively still stays open. Currently a 3-dimensional Monte Carlo collisional exosphere model is developed to answer this question. In this model effects of planetary rotation, photoionization, Ly- scattering and charge exchange with solar wind are included. Although the change of exospheric density profile is indistinctive, simulation results show the existence of the hot atomic hydrogen population produce by charge exchange does change the exospheric temperature structure greatly and the symmetry of the exospheric structure is destroyed totally at high altitude. An noticeable phenomenon is the nightside exosphere is also populated by that dilute but hot (~106K) component. We investigate our simulation results by calculating the contribution of the hot component to Ly- emission of and compare it with data acquired by Mariners' ultraviolet spectrometers. Further, output of our model can be used to predict the particle observation made by future missions to Mars.
Chen Yafeng
Cloutier Paul A.
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