Context: Substructures - dark lanes and tails - of umbral dots (UDs) were predicted by numerical simulations of magnetoconvection and have been detected later...
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PublicaciónMorphology and evolution of umbral dots and their substructures
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PublicaciónMoving Magnetic Features as Prolongation of Penumbral Filaments
A sequence of 633 high spatial resolution magnetograms and continuum images from SOHO MDI of NOAA AR 0330 is used to study moving magnetic feature (MMF)...
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PublicaciónNaked emergence of an anti-Hale active region. I. Overall evolution and magnetic properties
Aims: In order to understand the emergence of the active region, we investigate the emerging process and magnetic properties of a naked anti-Hale active region...
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PublicaciónNew information about solar rotation
It is pointed out that the phenomenon of solar rotation is known since the introduction of the telescope into astronomy by Galilei in 1610. Regular measurements...
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PublicaciónNew windows to the universe; Proceedings of the Eleventh European Regional Astronomy Meeting, Universidad de la Laguna, Spain, July 3-8, 1989. Part II
Recent observational and theoretical investigations of the sun and sunlike stars and of galactic structure and evolution are discussed in reviews and reports...
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PublicaciónNLTE effects in iron spectrum of sunspots.
Not Available
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PublicaciónNumerical determination of the cutoff frequency in solar models
Context. In stratified atmospheres, acoustic waves can only propagate if their frequency is higher than the cutoff value. The determination of the cutoff...
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PublicaciónNumerical Modeling of Magnetohydrodynamic Wave Propagation and Refraction in Sunspots
We present numerical simulations of magnetoacoustic wave propagation from the photosphere to the low chromosphere in a magnetic sunspot-like structure. A thick...
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PublicaciónNumerical simulation of propagation of the MHD waves in sunspots
We present results of numerical 3D simulation of propagation of MHD waves in sunspots. We used two self consistent magnetohydrostatic background models of...