Search Results - "Wiegelmann, T"

Nonlinear force-free modeling of the solar coronal magnetic field by Wiegelmann, T.

“…The coronal magnetic field is an important quantity because the magnetic field dominates the structure of the solar corona. Unfortunately, direct measurements…”
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Optimization code with weighting function for the reconstruction of coronal magnetic fields by Wiegelmann, T

“…We developed a code for the reconstruction of nonlinear force-free and non-force-free coronal magnetic fields. The 3D magnetic field is computed numerically…”
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QUASI-STATIC THREE-DIMENSIONAL MAGNETIC FIELD EVOLUTION IN SOLAR ACTIVE REGION NOAA 11166 ASSOCIATED WITH AN X1.5 FLARE by VEMAREDDY, P, Wiegelmann, T

“…We study the quasi-static evolution of coronal magnetic fields constructed from the non-linear force-free field (NLFFF) approximation aiming to understand the…”
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Preprocessing of Vector Magnetograph Data for a Nonlinear Force-Free Magnetic Field Reconstruction by Wiegelmann, T, Inhester, B, Sakurai, T

“…Knowledge regarding the coronal magnetic field is important for the understanding of many phenomena, like flares and coronal mass ejections. Because of the low…”
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How Should One Optimize Nonlinear Force-Free Coronal Magnetic Field Extrapolations from SDO/HMI Vector Magnetograms? by Wiegelmann, T., Thalmann, J. K., Inhester, B., Tadesse, T., Sun, X., Hoeksema, J. T.

“…The Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO) provides photospheric vector magnetograms with a high spatial and…”
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Computing Nonlinear Force-Free Coronal Magnetic Fields in Spherical Geometry by Wiegelmann, T

“…We describe a newly developed code for the extrapolation of nonlinear force-free coronal magnetic fields in spherical coordinates. The program uses measured…”
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MULTIWAVELENGTH OBSERVATIONS OF A PARTIALLY ERUPTIVE FILAMENT ON 2011 SEPTEMBER 8 by Zhang, Q. M., Ning, Z. J., Guo, Y., Zhou, T. H., Cheng, X., Ji, H. S., Feng, L., Wiegelmann, T.

“…ABSTRACT In this paper, we report our multiwavelength observations of a partial filament eruption event in NOAA active region (AR) 11283 on 8 September 2011. A…”
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Unveiling the True Nature of Plasma Dynamics from the Reference Frame of a Superpenumbral Fibril by Bate, W., Jess, D. B., Grant, S. D. T., Hillier, A., Skirvin, S. J., Van Doorsselaere, T., Jafarzadeh, S., Wiegelmann, T., Duckenfield, T., Beck, C., Moore, T., Stangalini, M., Keys, P. H., Christian, D. J.

“…Abstract The magnetic geometry of the solar atmosphere, combined with projection effects, makes it difficult to accurately map the propagation of ubiquitous…”
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FORCE-FREE FIELD MODELING OF TWIST AND BRAIDING-INDUCED MAGNETIC ENERGY IN AN ACTIVE-REGION CORONA by Thalmann, J K, Tiwari, S K, Wiegelmann, T

“…The theoretical concept that braided magnetic field lines in the solar corona may dissipate a sufficient amount of energy to account for the brightening…”
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MAGNETO-STATIC MODELING OF THE MIXED PLASMA BETA SOLAR ATMOSPHERE BASED ON SUNRISE/IMaX DATA by Wiegelmann, T., Neukirch, T., Nickeler, D. H., Solanki, S. K., Pillet, V. Martínez, Borrero, J. M.

“…ABSTRACT Our aim is to model the three-dimensional magnetic field structure of the upper solar atmosphere, including regions of non-negligible plasma beta. We…”
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Nonlinear Force-free Field Modeling of a Solar Active Region around the Time of a Major Flare and Coronal Mass Ejection by Schrijver, C. J, DeRosa, M. L, Metcalf, T, Barnes, G, Lites, B, Tarbell, T, McTiernan, J, Valori, G, Wiegelmann, T, Wheatland, M. S, Amari, T, Aulanier, G, Démoulin, P, Fuhrmann, M, Kusano, K, Régnier, S, Thalmann, J. K

“…Solar flares and coronal mass ejections are associated with rapid changes in field connectivity and are powered by the partial dissipation of electrical…”
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Coexisting Flux Rope and Dipped Arcade Sections Along One Solar Filament by Guo, Y, Schmieder, B, Démoulin, P, Wiegelmann, T, Aulanier, G, Török, T, Bommier, V

“…We compute the three-dimensional magnetic field of an active region in order to study the magnetic configuration of active region filaments. The nonlinear…”
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THE INFLUENCE OF SPATIAL RESOLUTION ON NONLINEAR FORCE-FREE MODELING by DeRosa, M. L., Wheatland, M. S., Leka, K. D., Barnes, G., Amari, T., Canou, A., Gilchrist, S. A., Thalmann, J. K., Valori, G., Wiegelmann, T., Schrijver, C. J., Malanushenko, A., Sun, X., Régnier, S.

“…ABSTRACT The nonlinear force-free field (NLFFF) model is often used to describe the solar coronal magnetic field, however a series of earlier studies revealed…”
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MAGNETIC ENERGY PARTITION BETWEEN THE CORONAL MASS EJECTION AND FLARE FROM AR 11283 by Feng, L, Wiegelmann, T, SU, Y, Inhester, B, Li, Y P, Sun, X D, Gan, W Q

“…On 2011 September 6, an X-class flare and a halo coronal mass ejection (CME) were observed from Earth erupting from the same active region AR 11283. The…”
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An overall view of temperature oscillations in the solar chromosphere with ALMA by Jafarzadeh, S, Wedemeyer, S, Fleck, B, Stangalini, M, Jess, D B, Morton, R J, Szydlarski, M, Henriques, V M J, Zhu, X, Wiegelmann, T, Guevara Gómez, J C, Grant, S D T, Chen, B, Reardon, K, White, S M

“…By direct measurements of the gas temperature, the Atacama Large Millimeter/submillimeter Array (ALMA) has yielded a new diagnostic tool to study the solar…”
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STATISTICAL STUDY OF FREE MAGNETIC ENERGY AND FLARE PRODUCTIVITY OF SOLAR ACTIVE REGIONS by Su, J T, Jing, J, Wang, S, Wiegelmann, T, Wang, H M

“…Photospheric vector magnetograms from the Helioseismic and Magnetic Imager on board the Solar Dynamic Observatory are utilized as the boundary conditions to…”
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Sources of the Slow Solar Wind During the Solar Cycle 23/24 Minimum by Kilpua, E. K. J., Madjarska, M. S., Karna, N., Wiegelmann, T., Farrugia, C., Yu, W., Andreeova, K.

“…We investigate the characteristics and the sources of the slow ( < 450 km s − 1 ) solar wind during the four years (2006 – 2009) of low solar activity between…”
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Estimating the Relative Helicity of Coronal Magnetic Fields by Thalmann, J. K., Inhester, B., Wiegelmann, T.

“…To quantify changes of the solar coronal field connectivity during eruptive events, one can use magnetic helicity, which is a measure of the shear or twist of…”
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COMPARISON OF FORCE-FREE CORONAL MAGNETIC FIELD MODELING USING VECTOR FIELDS FROM HINODE AND SOLAR DYNAMICS OBSERVATORY by Thalmann, J K, Tiwari, S K, Wiegelmann, T

“…Photospheric magnetic vector maps from two different instruments are used to model the nonlinear force-free coronal magnetic field above an active region. We…”
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Effect of the Size of the Computational Domain on Spherical Nonlinear Force-Free Modeling of a Coronal Magnetic Field Using SDO/HMI Data by Tadesse, Tilaye, Wiegelmann, T., MacNeice, P. J.

“…The solar coronal magnetic field produces solar activity, including extremely energetic solar flares and coronal mass ejections (CMEs). Knowledge of the…”
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