Heliosheath Processes and the Structure of the Heliopause: Modeling Energetic Particles, Cosmic Rays, and Magnetic Fields

Pogorelov, N. V.; Fichtner, H.; Czechowski, A.; Lazarian, A.; Lembege, B.; le Roux, J. A.; Potgieter, M. S.; Scherer, K.; Stone, E. C.; Strauss, R. D.; Wiengarten, T.; Wurz, Peter; Zank, G. P.; Zhang, M. (2017). Heliosheath Processes and the Structure of the Heliopause: Modeling Energetic Particles, Cosmic Rays, and Magnetic Fields. Space science reviews, 212(1-2), pp. 193-248. Springer 10.1007/s11214-017-0354-8

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This paper summarizes the results obtained by the team “Heliosheath Processes and the Structure of the Heliopause: Modeling Energetic Particles, Cosmic Rays, and Magnetic Fields” supported by the International Space Science Institute (ISSI) in Bern, Switzerland. We focus on the physical processes occurring in the outer heliosphere, especially at its boundary called the heliopause, and in the local interstellar medium. The importance of magnetic field, charge exchange between neutral atoms and ions, and solar cycle on the heliopause topology and observed heliocentric distances to different heliospheric discontinuities are discussed. It is shown that time-dependent, data-driven boundary conditions are necessary to describe the heliospheric asymmetries detected by the Voyager spacecraft. We also discuss the structure of the heliopause, especially due to its instability and magnetic reconnection. It is demonstrated that the Rayleigh–Taylor instability of the nose of the heliopause creates consecutive layers of the interstellar and heliospheric plasma which are magnetically connected to different sources. This may be a possible explanation of abrupt changes in the galactic and anomalous cosmic ray fluxes observed by Voyager 1 when it was crossing the heliopause structure for a period of about one month in the summer of 2012.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Wurz, Peter

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

0038-6308

Publisher:

Springer

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

13 Nov 2017 16:13

Last Modified:

13 Nov 2017 16:13

Publisher DOI:

10.1007/s11214-017-0354-8

BORIS DOI:

10.7892/boris.105629

URI:

https://boris.unibe.ch/id/eprint/105629

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