An analysis of high-resolution Stokes observations of two light bridges in the active region NOAA 8990 is presented. The observations were recorded with the La Palma Stokes Polarimeter attached to the Swedish Vacuum Solar Telescope. The stratification of different physical parameters is retrieved using the Stokes Inversion based on Response

We present visible and near-infrared spectra (0.5 2.4 μm) of 11 Near Earth Asteroids obtained with the telescopes at the “Observatorio del Roque de los Muchachos” in La Palma, Spain. A spectral analysis of the obtained data is performed in order to establish the taxonomical classification of the observed asteroids. We use the method outlined by

Abstract not available.

We present the first results of CaII triplet observations from VLT/FLAMES for Sculptor, Fornax and Sextans dSphs. For each galaxy, we obtained accurate velocity and metallicity measurements for hundreds of stars out to and beyond the tidal radius. In each case, we find clear evidence for the presence of two distinct stellar components with

In this work we present the first results of a study of BAL QSOs (at low and high redshift), based on very deep Gemini GMOS integral field spectroscopy. Three-dimensional (3D) spectra and maps of Mrk 231 clearly show that the BAL systems I and II are extended (reaching 1.2--1.3 kpc, from the nucleus) and elongated at the position angle (PA) close

The variation of some fundamental constants of nature is a prediction of several unifying theories. As physics at recombination is sensitive to the value of the electron mass and the fine structure constant, cosmic microwave background radiation (CMB) provides an excellent laboratory to constrain such theories. In this work, we used WMAP-3yr data