Aims: Combining high-resolution spectropolarimetric and imaging data is key to understanding the decay process of sunspots as it allows us to scrutinize the...
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PublicationHigh-resolution imaging and near-infrared spectroscopy of penumbral decay
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PublicationHigh-Resolution Proper Motions in a Sunspot Penumbra
Local correlation tracking techniques are used to measure proper motions in a series of high angular resolution (~0.1") penumbra images. If these motions trace...
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PublicationImpact of opacity effects on chromospheric oscillations inferred from NLTE inversions
Context. Spectropolarimetric inversions are a fundamental tool for diagnosing the solar atmosphere. Chromospheric inferences rely on the interpretation of...
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PublicationInference of the chromospheric magnetic field orientation in the Ca ii 8542 Å line fibrils
Context. Solar chromospheric fibrils, as observed in the core of strong chromospheric spectral lines, extend from photospheric field concentrations suggesting...
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PublicationInfrared photometric results of a sunspot
We obtained simultaneously recorded time series of broadband images of a sunspot close to the disk center at the German Vacuum Tower Telescope, Tenerife, in two...
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PublicationInteraction of Convective Structures with the Magnetic Field of Solar Pores
Time series of high-resolution white-light images of solar pores are analyzed. Granular motions in the vicinity of pores are driven by mesogranular flows...
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PublicationInversion Techniques Applied to Sunspot Spectropolarimetric Data
Two inversion techniques are compared: the Unno-Rachkov-sky fitting method (UR) and the Stokes Inversion based on Response functions (SIR). Results with...
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PublicationInversions of synthetic umbral flashes: a selection of wavelength sampling
Context. Imaging spectrographs are popular instruments used to obtain solar data. They record quasi-monochromatic images at selected wavelength positions. By...
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PublicationInversions of synthetic umbral flashes: Effects of scanning time on the inferred atmospheres
Context. The use of instruments that record narrowband images at selected wavelengths is a common approach in solar observations. They allow scanning of a...