An Improved Analytical Model of the Local Interstellar Magnetic Field: The Extension to Compressibility

Kleimann, Jens and Roeken, Christian and Fichtner, Horst (2017) An Improved Analytical Model of the Local Interstellar Magnetic Field: The Extension to Compressibility. ASTROPHYSICAL JOURNAL, 838 (1): 75. ISSN 0004-637X, 1538-4357

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Abstract

A previously published analytical magnetohydrodynamic model for the local interstellar magnetic field in the vicinity of the heliopause (Roken et al. 2015) is extended from incompressible to compressible,. yet predominantly subsonic flow, considering both isothermal and adiabatic equations of state. Exact expressions and suitable approximations for the density and the flow velocity are derived and discussed. In addition to the stationary induction equation, these expressions also satisfy the momentum balance equation along stream lines. The practical usefulness of the corresponding, still exact, analytical magnetic field solution is assessed by comparing it quantitatively to results from a fully self-consistent magnetohydrodynamic simulation of the interstellar magnetic field draping around the heliopause.

Item Type: Article
Uncontrolled Keywords: SOLAR-WIND; BOW SHOCK; STELLAR-WIND; HELIOSPHERE; HELIOPAUSE; DISTRIBUTIONS; EVOLUTION; PROTONS; FLOWS; IBEX; magnetic fields; magnetohydrodynamics (MHD); methods: analytical; Sun: heliosphere
Subjects: 500 Science > 510 Mathematics
Divisions: Mathematics
Depositing User: Dr. Gernot Deinzer
Date Deposited: 14 Dec 2018 13:00
Last Modified: 27 Feb 2019 14:38
URI: https://pred.uni-regensburg.de/id/eprint/211

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