Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh53b1503h&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH53B-1503
Physics
2126 Heliosphere/Interstellar Medium Interactions, 2151 Neutral Particles (7837)
Scientific paper
The solar wind is a highly supersonic stream of ionized gas which creates a large bubble of plasma around the Sun. Here we present a detailed comparison between the 3D kinetic Monte-Carlo and multiple neutral fluid approaches to modeling hydrogen atoms of interstellar and heliospheric origins, coupled through charge-exchange to the ionized plasma. Our results show a similar overall heliospheric structure, with a heliopause in approximately the same place, for both the kinetic and fluid models. The velocity distributions at various locations along different lines of sight show that while the kinetic model predicts a smooth distribution, the total fluid distribution is more disjointly structured. We also find that neutral atoms produced in the inner heliosheath have a "half-Maxwellian" distribution outside the heliopause, something which cannot be realized within the fluid model.
Florinski Vladimir
Heerikhuisen Jacob
Pogorelov Nikolai V.
Zank Gary P.
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