We investigate the radial variation of the magnetic field structure across sunspots, pores and azimuth centers (ACs). We define ACs as magnetic structures of...
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PublicaciónThe magnetic structure of pores and sunspots derived from Advanced Stokes Polarimeter data.
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PublicaciónThe magnetic SW Sextantis star RXJ1643.7+3402
We present time-resolved spectroscopy and circular spectropolarimetry of the SW Sex star RXJ1643.7+3402. We find significant polarization levels exhibiting a...
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PublicaciónThe Magnetized Disk-Halo Transition Region of M51
An excellent laboratory for studying large scale magnetic fields is the grand design face-on spiral galaxy M51. Due to wavelength-dependent Faraday...
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PublicaciónThe Motion of Magnetic Flux Tubes in the Convection Zone and the Subsurface Origin of Active Regions
The rise of kink-unstable magnetic flux tubes through the solar convection zone is discussed with a view to explaining the subsurface origin of active regions...
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PublicaciónThe multi-component field topology of sunspot penumbrae. A diagnostic tool for spectropolarimetric measurements
Context: .Sunspot penumbrae harbor highly structured magnetic fields and flows. The moving flux tube model offers an explanation for several observed phenomena...
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PublicaciónThe Physical Origin of the Scattering Polarization of the Na I D Lines in the Presence of Weak Magnetic Fields
We demonstrate that the atomic alignment of the hyperfine-structure components of the ground-level S1/2 of Na I and of the upper-level P1/2 of the D1 line are...
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PublicaciónThe Physics of Twisted Magnetic Tubes Rising in a Stratified Medium: Two-dimensional Results
The physics of a twisted magnetic flux tube rising in a stratified medium is studied using a numerical MHD code. The problem considered is fully compressible...
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PublicaciónThe Polarimetric and Helioseismic Imager on Solar Orbiter
Aims: This paper describes the Polarimetric and Helioseismic Imager on the Solar Orbiter mission (SO/PHI), the first magnetograph and helioseismology instrument...
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PublicaciónThe polarization angle in the wings of Ca I 4227: A new observable for diagnosing unresolved photospheric magnetic fields
Context. When observed in quiet regions close to the solar limb, many strong resonance lines show conspicuous linear polarization signals, produced by...