High mass X-ray binaries (HMXBs) are important laboratories where to study the characteristics of the accretion processes and the nature of compact objects. For this reason, we have started the determination of the fundamental properties (mass, radius, temperature, etc.) of the optical components in four systems: 2S 0114+65, IGR J00370+6122, XTE

Asteroids can be defined as objects that do not have an atmosphere, are smaller than the planets and orbit the Sun. But, what is most important, asteroids are the remnants of the first forming blocks of the Solar System. The main asteroid population is located between the orbits of Mars and Jupiter, in a region called the Main Belt (MB). Other

We studied the evolution of the Fundamental Plane in B and g-bands, for a sample of early--type galaxies in the redshift range 0.2 z 1.2. Assuming that effective radii and velocity dispersions do not evolve with redshift, we found that the galaxies at ˜ 0.7 were 0.68 mag brighter in the B-band and 0.52 mag brighter in the g-band, than their local

In this work we focus on the evolution of the SFR, metallicity of the gas, and morphology of galaxies at low redshift in search of signs of evolution. We analyzed the evolution of the SFR, metallicity, and morphology, through the mass-metallicity, luminosity-metallicity, SFR-stellar mass, and SFR-metallicity relationships of star-forming galaxies

The site for the future European Extremely Large Telescope (E-ELT) is already known to be Armazones, near Paranal (Chile). The selection was based on a variety of considerations, with an important one being the quality of the atmosphere for the astronomy planned for the ELT. We present an overview of the characterization of the atmospheric

By making use of real information about the continental and oceanic surface distribution of the Earth, and cloudiness data from the International Satellite Cloud Climatology Project (ISCCP), we have studied the large-scale cloudiness behavior according to latitude and surface types (ice, water, vegetation and desert). These empirical relationships