Effects Non-uniform Flux Transfer and Empirically Based Heliosheath Plasma Distributions on Global Maps of Heliospheric Energetic Neutral Atoms

Physics

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2124 Heliopause And Solar Wind Termination, 2126 Heliosphere/Interstellar Medium Interactions, 2151 Neutral Particles (7837), 2152 Pickup Ions

Scientific paper

The launch of the Interstellar Boundary Explorer (IBEX) begins a new generation of outer heliospheric science. From its high-altitude orbit, the IBEX mission will produce the first all-sky maps of energetic neutral atoms (ENAs) created directly from the heliosheath plasma, which carries the imprint of the global boundaries of the solar system. Here, we explore the importance of key interstellar and solar wind parameters to global maps of ENA flux at 1 AU, generated by a combination of physical models: a magnetohydrodynamic heliosheath plasma simulation, flux-transfer through the heliosphere including non-uniform loss, and a full IBEX instrument model. We also discuss the impact of the pick-up ion and thermal solar wind distributions as implied by recent STEREO and Voyager measurements.

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