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Article
Late-Type Active Stars: Rotation & Companions
Rapid rotation has been established empirically as the controlling factor for the magnetic field strength and the magnetic activity level of single late-type (F-M) stars. The dynamo theories explain this fact ...
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Chapter and Conference Paper
Abundance Variations in NGC 288, NGC 362 and NGC 1851
Strömgren uvby photometry is a powerful tool to study abundance variations in globular clusters through the c 1 and m 1 indices. This is because the NH (3360Å) and ...
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Chapter and Conference Paper
Studying Old Open Clusters with Detached Eclipsing Binaries
The single most important parameter which determines the evolution of a star is its mass. Detached eclipsing binaries offer the possibility to determine accurate masses and radii for their components. By study...
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Article
Giant Vibrations in Dip
This work reports the discovery of solar-type oscillations in thegiant star ξ Hydrae.