We analyze high-resolution spectropolarimetric observations of a flux-emerging region (FER) in order to understand its magnetic and kinematic structure. Our...
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PublicationThree-dimensional magnetic field structure of a flux-emerging region in the solar atmosphere
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PublicationThree-dimensional Plasmoid Evolution in the Solar Atmosphere
We present clear evidence of the formation of three-dimensional (3D) plasmoids in the current sheet between two magnetic flux systems in a 3D numerical...
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PublicationThree-dimensional Radiative Transfer Simulations of the Scattering Polarization of the Hydrogen Lyα Line in a Magnetohydrodynamic Model of the Chromosphere–Corona Transition Region
Probing the magnetism of the upper solar chromosphere requires measuring and modeling the scattering polarization produced by anisotropic radiation pumping in...
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PublicationThree-dimensional simulations of solar magneto-convection including effects of partial ionization
In recent decades, REALISTIC three-dimensional radiative-magnetohydrodynamic simulations have become the dominant theoretical tool for understanding the complex...
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PublicationThree-dimensional structure of a sunspot light bridge
Context. Active regions are the most prominent manifestations of solar magnetic fields; their generation and dissipation are fundamental problems in solar...
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PublicationTowards an understanding of the Of?p star HD 191612: optical spectroscopy
We present extensive optical spectroscopy of the early-type magnetic star HD 191612 (O6.5f?pe-O8fp). The Balmer and HeI lines show strongly variable emission...
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PublicationTruncated stellar discs in the near infrared. II. Statistical properties and interpretation
The results obtained in Paper I are used to study possible relationships between the truncation radius of stellar discs in the NIR and structural parameters of...
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PublicationTurbulent Erosion of Magnetic Flux Tubes
Results from a numerical and analytical investigation of the solution of a nonlinear axisymmetric diffusion equation for the magnetic field are presented for...
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PublicationTwenty-year monitoring of the surface magnetic fields of chemically peculiar stars
Magnetic chemically peculiar stars of the main sequence can present rotational periods as long as many decades. Here we report the results of an observational...