The continuum contrast between fluxtubes and their quiet background, and the magnetic flux carried by these magnetic elements, have been determined at different points of a solar facula, in the frame of a two-component model from spectropolarimetric observations of 1arcsec spatial resolution. Local spatial variations of these two parameters have

The continuum contrast between flux tubes and their quiet background, and the magnetic flux carried by these magnetic elements, have been determined at different points of a solar facula. A two-component model based on spectropolarimetric observations of 1-arcsec spatial resolution is employed. Local spatial variations of these two parameters have

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A search for binaries among 17 blue stragglers in five galactic clusters, NGC 7789, 6633, 6819, 6939, and M 67, has been performed using measurements of radial velocity variations. The spectra were obtained with the Intermediate Dispersion Spectrograph attached to the f/15 Cassegrain focus of the 2.5 m Isaac Newton Telescope at the Spanish

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The author presents 2.2 micron maps of selected areas of the galactic plane, taken with the 1.5 m. Sánchez-Magro telescope on the island of Tenerife. A model of the galactic stellar distribution has been developed. The results are in good agreement with the experimental data and suggest remarkable differences between the luminosity functions for