Comparison of interstellar boundary explorer observations with 3D global heliospheric models

N. A. Schwadron, M. Bzowski, G. B. Crew, M. Gruntman, H. Fahr, H. Fichtner, P. C. Frisch, H. O. Funsten, S. Fuselier, J. Heerikhuisen, V. Izmodenov, H. Kucharek, M. Lee, G. Livadiotis, D. J. McComas, E. Moebius, T. Moore, J. Mukherjee, N. V. Pogorelov, C. PrestedD. Reisenfeld, E. Roelof, G. P. Zank

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181 Scopus citations

Abstract

Simulations of energetic neutral atom (ENA) maps predict flux magnitudes that are, in some cases, similar to those observed by the Interstellar Boundary Explorer (IBEX) spacecraft, but they miss the ribbon. Our model of the heliosphere indicates that the local interstellar medium (LISM) magnetic field (BLISM) is transverse to the line of sight (LOS) along the ribbon, suggesting that the ribbon may carry its imprint. The force-per-unit area on the heliopause from field line draping and the LISM ram pressure is comparable with the ribbon pressure if the LOS ∼ 30 to 60 astronomical units and B LISM ∼ 2.5 microgauss. Although various models have advantages in accounting for some of the observations, no model can explain all the dominant features, which probably requires a substantial change in our understanding of the processes that shape our heliosphere.

Original languageEnglish (US)
Pages (from-to)966-968
Number of pages3
JournalScience
Volume326
Issue number5955
DOIs
StatePublished - Nov 13 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

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    Schwadron, N. A., Bzowski, M., Crew, G. B., Gruntman, M., Fahr, H., Fichtner, H., Frisch, P. C., Funsten, H. O., Fuselier, S., Heerikhuisen, J., Izmodenov, V., Kucharek, H., Lee, M., Livadiotis, G., McComas, D. J., Moebius, E., Moore, T., Mukherjee, J., Pogorelov, N. V., ... Zank, G. P. (2009). Comparison of interstellar boundary explorer observations with 3D global heliospheric models. Science, 326(5955), 966-968. https://doi.org/10.1126/science.1180986