Comparison of Interstellar Boundary Explorer Observations with 3-D Global Heliospheric Models

Details Comparison of Interstellar Boundary Explorer Observations with 3-D Global Heliospheric Models Comparison of Interstellar Boundary Explorer Observations with 3-D Global Heliospheric Models

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh32a..01s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH32A-01

Physics

[2124] Interplanetary Physics / Heliopause And Solar Wind Termination, [2126] Interplanetary Physics / Heliosphere/Interstellar Medium Interactions, [2144] Interplanetary Physics / Interstellar Gas

Scientific paper

The Interstellar Boundary Explorer (IBEX) mission has recently completed the first global energetic neutral atom (ENA) maps of the heliosheath. Global models provide critical insight for the interpretation of these unprecedented observations. Simulated ENA maps predict flux magnitudes that are, in some cases, similar to observations, but they also exhibit key differences. Models have explored the influence of the conditions of local interstellar medium (LISM) on ENA maps, but the models make fundamental assumptions about the energy and pitch-angle distributions of the heliosheath protons, and the LISM conditions. The directly observed energy distributions of ENAs by IBEX test the assumed energy distributions used in models (e.g., kappa and Maxwellian distributions), and suggest areas where the models may be missing significant physical ingredients. Thus, through the examination of features observed by IBEX and detailed comparison with global models, we quantitatively explore possible implications of the IBEX observations.

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