Carrying out detailed analyses on massive blue stars further than the Milky Way is a demanding task, however it is feasible and the best way to comprehend the stellar evolution in environments with different metallicity. We present the first quantitative study performed on a massive blue star sample belonging to NGC~55, about 1.9 Mpc away. The

We present here the Calar Alto Legacy Integral Field spectroscopy Area survey (CALIFA). CALIFA is large collaboration comprising more than 50 astronomers of 8 different countries, which main aim is to obtain detailed spatially resolved spectroscopic information of ˜ 600 galaxies of any type at the Local Universe (0.005

A detailed study of the spiral galaxy UGC9837 is carried out based on the IFU spectroscopic data from the pilot survey of the Calar Alto Legacy Field Survey (CALIFA). The integrated, radial and spatially resolved properties of the ionized gas are studied. In addition the possible biases caused by using a fixed aperture in studying galaxy properties

The Calar Alto Large Integral Field Area Survey (CALIFA) is a recently started survey with the main aims at observing a statistically well-defined sample of ˜ 600 galaxies in the local universe with the PMAS/PPAK integral field spectrophotometer on the 3.5 m telescope at the CAHA. The main goal of this survey is to characterize the spatially

Since the discovery of the first brown dwarfs, Teide 1 and Gl 229B in 1995, several hundreds of substellar objects have been discovered. During these fifteen years, the field of brown dwarfs has experimented a great development, only comparable to that carried out in the strongly related field of extrasolar planets. Substellar objects, on the

Blue compact dwarf galaxies (BCDs) take up the low end of the distribution of metallicity and nitrogen-to-oxygen (N/O) ratio as derived using collisional emission lines in ionized gaseous nebulae. This chemical status is well explained by chemical evolution models. Nevertheless, there is a subsample of BCDs with large values of N/O which cannot be