Las enanas marrones son el puente entre las estrellas menos masivas y los planetas gigantes. Más de diez años después de su descubrimiento.. Hemos pretendido realizar una determinación precisa de la función de masa en un cúmulo estelar muy joven e idóneo por su distancia y baja extinción, sigma Orionis, para explorar un rango de masas hasta el

We present a study of the young (30-100 Myr) open cluster IC 4665 with the aim to determine the shape of the mass function well into the brown dwarf regime. We photometrically select 691 low-mass stellar and 94 brown dwarf candidate members over an area of 3.82 square degrees centred on the cluster. K-band follow-up photometry and Two-Micron All

Work in progress in the design of a parallel simulation of a multipurpose cosmic rays detector is presented. The detector is part of an experiment whose main goal is to study the spectrum and composition of charged cosmic rays with unprecedent sensibility. Parallelism seems to be the most suitable approach to increase the performance of the

The galaxies NGC 3359, NGC 6951 and NGC 1530 were observed with the TAURUS-II Fabry-Perot interferometer at the 4.2m William Herschel Telescope (WHT) on La Palma. The data reduction for each galaxy is described respectively in Rozas et al. (2000A&A...354..823R, Cat. J/A+A/354/823>) for NGC 3359, in Rozas et al. (2002A&A...386...42R) for NGC 6951

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