The Role of Collisions and Charge Exchange in Determining Heliospheric Structure

Details The Role of Collisions and Charge Exchange in Determining Heliospheric Structure The Role of Collisions and Charge Exchange in Determining Heliospheric Structure

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh43a1089h&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH43A-1089

Physics

7837 Neutral Particles, 7843 Numerical Simulation Studies, 2151 Neutral Particles

Scientific paper

The interaction of the solar wind with the interstellar medium is strongly mediated by the presence of interstellar hydrogen atoms. The coupling of atoms to plasma is generally assumed to be via the process of charge exchange. However the cross-sections of H-H and H-p collisions are of similar magnitude to the charge-exchange cross-section, so that including collisions may affect the overall solution. We describe a newly developed Monte-Carlo approach of modeling interstellar hydrogen atoms impinging on the heliosphere is discussed. We present some preliminary results of simulations here charge exchange and collisions are considered and compare these to charge exchange only runs.

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