We describe the first instrument of a cosmic microwave background experiment for mapping cosmological structures on medium angular scales (the COSMOSOMAS experiment) and diffuse Galactic emission. The instrument is located at Teide Observatory (Tenerife) and is based on a circular scanning sky strategy. It consists of a 1-Hz spinning flat mirror

Jupiter family comets, Centaurs and Transneptunian Objects (TNOs) are three populations of minor solar system objects that are believed to be closely related. Information about the surface composition of these objects is scarce yet essential to understanding the links between them. Comet 28P/Neujmin 1 is among the largest and least active of the

High quality observations of the low-degree acoustic modes (p-modes) exist for almost two complete solar cycles using the solar spectrophotometer Mark-I, located at the Observatorio del Teide (Tenerife, Spain) and operating now as part of the Birmingham Solar Oscillations Network (BiSON). We have performed a Fourier analysis of 30 calibrated time

Las oscilaciones solares, y en concreto las frecuencias caracteristicas de estas, proporcionan una herramienta de diagnostico unica para investigar y entender la estructura y dinamica del sol. Estas frecuencias son modificadas de manera conocida por diferentes procesos permitiendo estudiar el origen fisico que los gobierna. En los ultimos años

Integral field optical spectroscopy using the INTEGRAL system has been used to characterize the kinematic and ionization properties of the warm gas within 2 kpc of the dust-enshrouded nucleus of Arp 220. Owing to the large internal extinction toward the nuclei, the brightest stellar and line-emitting regions observed at optical wavelengths do not

The aim of the SAURON collaboration, and the reason for building the instrument, is to study a representative sample of nearby ellipticals, lenticulars and bulges of early-type spirals, in order to measure their intrinsic shapes, velocity and metallicity distributions, and to gain insight into the relation between their stellar and gaseous.