Very High Energy (VHE, E>100 GeV) gamma-rays constitute still nowadays a largely unexplored observing window to the Universe. Due to the opacity of the Earth's atmosphere, the direct observation of these VHE gamma-photons is not possible from ground installations. Moreover, observation from Space by satellites results unfeasible for energies higher

The main goal of this thesis work is to find the links between star formation in galaxy bulges (mainly in the form of star-forming nuclear rings) and other properties of the host galaxy, such as the bar strength or the presence of sigma-drops. To do so we study galaxy non-axisymmetries and their side effects, such as dust lanes in bars. At the end

This thesis was devoted to the study of clusters and superclusters of galaxies. In particular, those that show a detectable Sunyaev-Zeldovich (SZ) effect. We aimed to fully characterize these structures and the relative contributions that their physical components (diffuse and collapsed phases) play in building up the total Sunyaev-Zeldovich signal

Las estrechas relaciones existentes entre parámetros fundamentales de galaxias, tanto espirales como elípticas, son un reflejo de su formación y evolución. Concretamente, la relación de Tully-Fisher y el Plano Fundamental son un indicativo de la relación existente entre la masa total y la masa luminosa de las galaxias. Ambas relaciones han sido de

Esta tesis consta de dos partes: una científica en la que con de datos espectroscópicos y fotométricos, se derivan la distribución de metalicidad, las propiedades a gran escala de la extinción infrarroja y la distribución estelar en el interior de la Vía Láctea; y una instrumental en la que se caracteriza el detector de EMIR, instrumento que nos

Active Galactic Nuclei (AGN) play an important role in many aspects of modern cosmology. One of the fundamental goals in cosmology is to determine the fraction of galaxies having AGN as a function of its morphology, environment, redshift, etc., and conversely, to determine how an AGN affects other galaxy properties, and which is the mechanism of