High resolution white-light pictures of sunspot penumbrae are presented. These include pictures showing details of their filamentary structure and some...
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PublicaciónObservations of the birth and fine structure of sunspot penumbrae
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PublicaciónOn the age dependence of the asymmetry of penumbrae of sunspot
The age dependence of the recently described asymmetry of penumbrae of large stable sunspots was analyzed. Young sunspots showed shorter eastern penumbrae...
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PublicaciónOn the initial orientation of emerging active regions
The initial orientation of 74 active regions (ARs) as measured in high resolution pictures. As previous works by the author (Garcia de la Rosa, 1984) suggest a...
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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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PublicaciónRise times of horizontal magnetic flux tubes in the convection zone of the sun
Solutions of the equations describing the motion of a straight horizontal magnetic flux tube in the convection zone of the sun including inertial term and...
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PublicaciónSeismic Holography of the Solar Interior near the Maximum and Minimum of Solar Activity
The base of the convection zone and the tachocline play a major role in the study of the dynamics of the Sun, especially in the solar dynamo. Here, we present a...
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PublicaciónSolar structure from global studies of the 5-minute oscillation
An overall view of the solar surface is presented with emphasis on the study of low 1 value oscillations. Line of sight velocity measurements of the whole solar...
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CharlaSolar-terrestrial relations – combined remote sensing and in-situ data
The Sun is an active star that influences the Earth as well as the entire solar system. Most dynamic phenomena on the Sun are observed as coronal mass ejections...
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PublicaciónSunspot populations and their relation with the solar cycle
The joint consideration of theoretical and observational arguments is used to conclude that two different spot populations co-exist in the Sun.