Kleimann, Jens and Roeken, Christian and Fichtner, Horst and Heerikhuisen, Jacob (2016) TOWARD MORE REALISTIC ANALYTIC MODELS OF THE HELIOTAIL: INCORPORATING MAGNETIC FLATTENING VIA DISTORTION FLOWS. ASTROPHYSICAL JOURNAL, 816 (1): 29. ISSN 0004-637X, 1538-4357
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Both physical arguments and simulations of the global heliosphere indicate that the tailward heliopause is flattened considerably in the direction perpendicular to both the incoming flow and the large-scale interstellar magnetic field. Despite this fact, all of the existing global analytical models of the outer heliosheath' s magnetic field assume a circular cross section of the heliotail. To eliminate this inconsistency, we introduce a mathematical procedure by which any analytically or numerically given magnetic field can be deformed in such a way that the cross sections along the heliotail axis attain freely prescribed, spatially dependent values for their total area and aspect ratio. The distorting transformation of this method honors both the solenoidality condition and the stationary induction equation with respect to an accompanying flow field, provided that both constraints were already satisfied for the original magnetic and flow fields prior to the transformation. In order to obtain realistic values for the above parameters, we present the first quantitative analysis of the heliotail' s overall distortion as seen in state-of-the-art three-dimensional hybrid MHD-kinetic simulations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TEV COSMIC-RAYS; INTERSTELLAR-BOUNDARY; OUTER HELIOSPHERE; SOLAR-WIND; ANISOTROPY; FIELD; TAIL; HELIOPAUSE; ATOMS; DIRECTION; ISM: magnetic fields; magnetohydrodynamics (MHD); methods: analytical; Sun: heliosphere |
| Subjects: | 500 Science > 510 Mathematics |
| Divisions: | Mathematics > Prof. Dr. Felix Finster |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Mar 2019 12:36 |
| Last Modified: | 07 Mar 2019 09:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2221 |
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