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Open and closed magnetic configurations of twisted flux tubes

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dc.contributor.author Sen, Samrat
dc.contributor.author Mangalam, A
dc.date.accessioned 2020-11-19T13:46:04Z
dc.date.available 2020-11-19T13:46:04Z
dc.date.issued 2019-06-01
dc.identifier.citation The Astrophysical Journal, Vol. 877, No. 2, 127 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7259
dc.description Restricted Access © The American Astronomical Society https://doi.org/10.3847/1538-4357/ab141a en_US
dc.description.abstract We construct two classes of magnetohydrostatic (MHS) equilibria for an axisymmetric vertical flux tube spanning from the photosphere to the lower part of the transition region within a realistic stratified solar atmosphere subject to solar gravity. We assume a general quadratic expression of the magnetic flux function for the gas pressure and poloidal current and solve the Grad–Shafranov equation analytically. The solution is a combination of a homogeneous and a particular part where the former is separable by a Coulomb function in r and exponential in z, while the particular part is an open configuration that has no z dependence. We also present another open field solution by using a self-similar formulation with two different profile functions and incorporating stratified solar gravity to maintain the magnetohydrostatic equilibria, which is a modification of earlier self-similar models with a twist. We study the admitted parameter space that is consistent with the conditions in the solar atmosphere and derive the magnetic and thermodynamic structures inside the flux tube that are reasonably consistent with the photospheric magnetic bright points for both open and closed field Coulomb function and self-similar models as estimated from observations and simulations. The obtained open and closed field flux tube solutions can be used as the background conditions for the numerical simulations for the study of the wave propagation through the flux tubes. The solutions can also be used to construct realistic magnetic canopies. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Magnetohydrodynamics (MHD) en_US
dc.subject Sun: activity en_US
dc.subject Sun: magnetic fields en_US
dc.subject Sun: photosphere en_US
dc.subject Sun: transition region en_US
dc.title Open and closed magnetic configurations of twisted flux tubes en_US
dc.type Article en_US


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