Our understanding of the evolution of galaxies within their optical radius has made great advances in the last decades. These have been achieved by analysing in detail the internal secular processes, the star formation history, and the Interstellar medium. However, the study of galaxy outskirts, so-called low surface brightness science, is still in

A bewildering variety of eruptive and ejective phenomena continually take place in the solar atmosphere on a wide range of space and time scales. Particular attention was devoted in the past decades to those associated with the reconnection of magnetic field lines of separate plasma systems that come into contact in the atmosphere, especially when

The study of the Cosmic Microwave Background (CMB) anisotropies is one of the key tools of Modern Cosmology. The most important limitations of the experiments aimed at measuring both the intensity and the polarisation of the CMB are the systematics and the foregrounds, i.e. the Milky Way diffuse emission. This thesis will be devoted to the

Esta tesis se basa en el estudio de la nucleosíntesis por captura neutrónica lenta (s-process) en las estrellas de la Rama Asintótica de Gigantes (AGB por sus siglas en inglés) en el contexto de las simulaciones numéricas. En concreto, se busca estudiar los efectos del esquema convectivo FST (Full Spectrum of Turbulence) usado en el código de

Los filamentos y protuberancias solares han sido el foco de muchos estudios desde hace más de 200 años por ser uno de los fenómenos más fascinantes del Sol. Sin embargo, no es hasta ahora, con la instrumentación actual, nuestra potencia de cálculo y una consolidada teoría de generación y transporte de radiación polarizada que podemos estudiar estas

Since its first observational evidence, gravitational lensing - the deflection of light by mass - has become an established astrophysical tool than can be used to study the physical properties and environments of the lens galaxies and to reveal the structure of the lensed quasars. This thesis combines theoretical and observational results of a