Context. Most of our knowledge of the stellar component of galaxies is based on the analysis of distant systems and comes from integrated light data. It is important to test whether the results of the star formation histories (SFH) obtained with standard full-spectrum fitting methods are in agreement with those obtained through colour-magnitude

We present a catalog of relative proper motions for 368,787 stars in the 30 Doradus region of the Large Magellanic Cloud (LMC), based on a dedicated two-epoch survey with the Hubble Space Telescope and supplemented with proper motions from our pilot archival study. We demonstrate that a relatively short epoch difference of three years is sufficient

Context. In the solar atmosphere, the acoustic cutoff frequency is a local quantity that depends on atmospheric height. It separates low-frequency evanescent waves from high-frequency propagating waves. Aims: We measure the cutoff frequency of slow magnetoacoustic waves at various heights of a sunspot umbra and compare the results with the

The James Webb Space Telescope (JWST) will be launched in 2020. The observations performed with this telescope will revolutionise the field of exoplanet characterisation. The Transiting Exoplanet Community propose to observe the exoplanet WASP-43b in order to better understand the physical structure and the chemical and dynamical processes

We report on the detection of flaring activity from the Fanaroff-Riley I radio galaxy NGC 1275 in very-high-energy (VHE, E > 100 GeV) gamma rays with the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes. The observations were performed between 2016 September and 2017 February, as part of a monitoring programme. The brightest outburst

Este trabajo de tesis está orientado al estudio de la extracción de información cosmológica de observaciones de la estructura a gran escala del Universo en combinación con medidas del fondo cósmico de microondas. Con este objetivo, la tesis se divide en tres partes fundamentales: la estimación de matrices de covarianza necesarias para la estimación