We present deep 3.6-8 μm imaging of the Hubble Deep Field-South with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We study distant red galaxies (DRGs) at z>2 selected by Js-Ks>2.3 and compare them with a sample of Lyman break galaxies (LBGs) at z=2-3. The observed UV-to-8 μm spectral energy distributions are fitted with stellar

We present Gemini-South observations of the nuclear starburst region of M83, using the CIRPASS near-IR integral-field spectrograph. Spectroscopic diagnostics are used to overcome many of the uncertainties inherent to photometric studies of the star-formation history of the central region of M83. We use Paβ and [Fe II] emission, and absorption in

Observations indicate that young massive star clusters in spiral and dwarf galaxies follow a relation between luminosity of the brightest young cluster and the star-formation rate (SFR) of the host galaxy, in the sense that higher SFRs lead to the formation of brighter clusters. Assuming that the empirical relation between maximum cluster

The question of how a starburst is fuelled is closely related to some of the main outstanding problems in our understanding of starbursts, namely which combination of physical conditions leads to the triggering of the burst, and how long the burst can last. There is observational evidence that galactic bars and galaxy-galaxy interactions can lead

Phase diversity techniques are robust post-processing tools for image enhancement and correction of telescopic and atmospheric induced aberrations. We present results obtained applying the Partitioned Phase-Diverse Speckle (PPDS) technique to images acquired at THEMIS. We also present an image quality estimator based on image power spectrum content

Esta tesis está dedicada al estudio de la emisión galáctica difusa y las anisotropías de la radiación cósmica de microondas por medio de las observaciones del experimento COSMOSOMAS. También se analizan estas emisiones en los mapas de WMAP, publicados tras el primer año de operación del satélite. Se presentan los mapas de COSMOSOMAS a 12.7, 14.7 y