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Presentamos y discutimos en esta tesis un nuevo y original algoritmo - el Método Integral Implícito (MII) - para la solución numérica de la ecuación de transporte radiativo (TR) en condiciones físicas similares a las de las atmósferas estelares. En la primera parte se presenta el proceso de TR en términos operativos actuales: utilización de la

The structure and kinematics of the bipolar nebula Mz 3 have been investigated by means of HST, CTIO and ESO images and spectra. At least four distinct outflows have been identified which, from the inside to the outside, are the following: a pair of bright bipolar lobes, two opposite highly collimated column-shaped outflows, a conical system of

We study the effects of magnetic field shear (By ≠ 0) and longitudinal propagation of perturbations (ky ≠ 0) on the linear and adiabatic magnetohydrodynamic (MHD) normal modes of oscillation of a potential coronal arcade. In a cold plasma, the inclusion of these two effects produces the linear coupling of discrete fast modes, characterised by a

The Chandra discovery of bright X-ray emission from kiloparsec-scale jets allows insight into the physical parameters of the jet flow at large scales. At the opposite extreme, extensive studies of the inner relativistic jets in blazars with multiwavelength observations yield comparable information on subparsec scales. In the framework of simple