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Analytical Three-dimensional Magnetohydrostatic Equilibrium Solutions for Magnetic Field Extrapolation Allowing a Transition from Non-force-free to Force-free Magnetic Fields

Neukirch, Thomas ; Wiegelmann, Thomas

Solar physics, 2019-12, Vol.294 (12), Article 171 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Analytical Three-dimensional Magnetohydrostatic Equilibrium Solutions for Magnetic Field Extrapolation Allowing a Transition from Non-force-free to Force-free Magnetic Fields
Autor: Neukirch, Thomas ; Wiegelmann, Thomas
Assuntos: Astrophysics and Astroparticles ; Atmospheric models ; Atmospheric Sciences ; Chromosphere ; Corona ; Extrapolation ; Force-free magnetic fields ; Magnetic fields ; Magnetism ; Mathematical models ; Numerical methods ; Photosphere ; Physics ; Physics and Astronomy ; Solar atmosphere ; Solar corona ; Solar magnetic field ; Solar physics ; Space Exploration and Astronautics ; Space Sciences (including Extraterrestrial Physics ; Three dimensional analysis
É parte de: Solar physics, 2019-12, Vol.294 (12), Article 171
Descrição: For the extrapolation of magnetic fields into the solar corona from measurements taken in the photosphere (or chromosphere) force-free magnetic fields are typically used. This does not take into account that the lower layers of the solar atmosphere are not force-free. While some numerical extrapolation methods using magnetohydrostatic magnetic fields have been suggested, a complementary and numerically comparatively cheap method is to use analytical magnetohydrostatic equilibria to extrapolate the magnetic field. In this paper, we present a new family of solutions for a special class of analytical three-dimensional magnetohydrostatic equilibria, which can be of use for such magnetic field extrapolation. The new solutions allow for the more flexible modeling of a transition from non-force-free to (linear) force-free magnetic fields. In particular, the height and width of the region where this transition takes place can be specified by choosing appropriate model parameters.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Analytical Three-dimensional Magnetohydrostatic Equilibrium Solutions for Magnetic Field Extrapolation Allowing a Transition from Non-force-free to Force-free Magnetic Fields

Neukirch, Thomas ; Wiegelmann, Thomas

Dordrecht: Springer Netherlands

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