The decay of a sunspot region was studied using high resolution white-light pictures. The photometric and geometric parameters of a light-bridge showing...
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PublicaciónPhotometry of light-bridges in sunspots
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PublicaciónPhotometry of sunspot penumbrae
The authors present the results of a statistical analysis of the penumbra of sunspots. The intensity distribution, and several parameters derived from it, is...
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PublicaciónPhotometry of sunspot pores from partial eclipse observations.
White-light images, centered at λ6708A, were obtained at the Swedish Solar Telescope, La Palma, on occasion of the 1994 May 10 partial solar eclipse. From the...
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PublicaciónPhysical properties of a sunspot chromosphere with umbral flashes
We present new high-resolution spectro-polarimetric Ca IIλ8542 observations of umbral flashes in sunspots. At nearly 0.18 arcsec, and spanning about one hour of...
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PublicaciónPhysical Properties of the Solar Magnetic Photosphere under the MISMA Hypothesis. III. Sunspot at Disk Center
Small-scale fluctuations of magnetic field and velocity may be responsible for the Stokes asymmetries observed in all photospheric magnetic structures (the...
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PublicaciónPolarimetric Measurements of Sunspots
Making emphasis on observations that have included some type of polarization analysis, I concentrate on two subjects. First, the vector magnetic field...
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PublicaciónProperties of horizontal flows inside and outside a solar pore
Horizontal velocities and their temporal variations inside a large pore and in the surrounding granulation are studied from a 73 min sequence of white light...
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PublicaciónProperties of sunspots in cycle 23. I. Dependence of brightness on sunspot size and cycle phase
Aims:In this paper we investigate the dependence of umbral core brightness, as well as the mean umbral and penumbral brightness on the phase of the solar cycle...
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PublicaciónProperties of the Umbral Filament Observed in Active Region NOAA 12529
Recent observations of the solar photosphere revealed the presence of elongated filamentary bright structures inside sunspot umbrae, called umbral filaments...