There is a long tradition on teaching Astronomy at the UCM University. Since 1972 it is possible to study Astrophysics at the Faculty of Physics of the UCM. The facilities of the UCM Observatory are improving continuously every year. Nowadays two domes (4 m) are available. The west dome is mainly used for doing solar observations while the east

A catalogue of galaxies with extremely red colours (R-J≥5), covering 8.43 square degrees has been selected from optical and near-infrared data. Based on their bright near-infrared magnitude and their very red colour, these objects are likely to be very massive galaxies with little or no ongoing star formation. We have derived a surface density of 0

Breaking age/metallicity degeneracy ([19], [1]) is crucial for understanding stellar populations in elliptical galaxies. Spectroscopic properties, such as line strength, can partially break age/metallicity degeneracy. Reference [19] found that Hβ index, defined in [4] (Lick indices), is relatively sensitive to luminosity-weighted age of galaxies

This work presents the first quiet Sun spectropolarimetric observations carried out in the visible and the infrared (IR) simultaneously. The Fe I lines at 6301.5, 6302.5, 15648, and 15652 Å were observed co-spatially, and at the same time (with a time lag of only 1 minute), with high sensitive spectropolarimeters operated in two different

The ratio of the intensities is related to the emph{equivalent width}, W, of the spectral lines, which shape is approximated to a Voigt function resulting from the convolution of a Lorentzian (Stark and Van der Waals effects) and Gaussian (Doppler effect and optical broadening) profiles. Thus, we have studied the influence of the self-absorption