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Título: | Magneto-static modeling from Sunrise/IMaX: application to an active region observed with Sunrise II |
Autor: | Wiegelmann, T.; Toro, José Carlos del CSIC ORCID ; Orozco Suárez, David CSIC ORCID CVN; Knölker, M. | Palabras clave: | Sun: chromosphere Sun: corona Sun: magnetic fields Sun: photosphere |
Fecha de publicación: | 22-mar-2017 | Editor: | American Astronomical Society Institute of Physics (Great Britain) |
Citación: | Astrophysical Journal - Supplement Series 229(1): 18 (2017) | Resumen: | ©2017 The American Astronomical Society. All rights reserved.Magneto-static models may overcome some of the issues facing force-free magnetic field extrapolations. So far they have seen limited use and have faced problems when applied to quiet-Sun data. Here we present a first application to an active region. We use solar vector magnetic field measurements gathered by the IMaX polarimeter during the flight of the Sunrise balloon-borne solar observatory in 2013 June as boundary conditions for a magneto-static model of the higher solar atmosphere above an active region. The IMaX data are embedded in active region vector magnetograms observed with SDO/HMI. This work continues our magneto-static extrapolation approach, which was applied earlier to a quiet-Sun region observed with Sunrise I. In an active region the signal-to-noise-ratio in the measured Stokes parameters is considerably higher than in the quiet-Sun and consequently the IMaX measurements of the horizontal photospheric magnetic field allow us to specify the free parameters of the model in a special class of linear magneto-static equilibria. The high spatial resolution of IMaX (110–130 km, pixel size 40 km) enables us to model the non-force-free layer between the photosphere and the mid-chromosphere vertically by about 50 grid points. In our approach we can incorporate some aspects of the mixed beta layer of photosphere and chromosphere, e.g., taking a finite Lorentz force into account, which was not possible with lower-resolution photospheric measurements in the past. The linear model does not, however, permit us to model intrinsic nonlinear structures like strongly localized electric currents. | Descripción: | T. Wiegelmann et. al. | Versión del editor: | https://doi.org/10.3847/1538-4365/aa582f | URI: | http://hdl.handle.net/10261/147545 | DOI: | 10.3847/1538-4365/aa582f | ISSN: | 0067-0049 | E-ISSN: | 1538-4365 |
Aparece en las colecciones: | (IAA) Artículos |
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IAA_2017_ApJS_229_17.pdf | 1,5 MB | Adobe PDF | Visualizar/Abrir |
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