de Cruz Pérez, Javier (Date of defense: 2021-04-16)
En aquesta tesi s’estudien diferents models cosmològics, tots ells caracteritzats per considerar, de manera efectiva, una lleu evolució temporal de l’Energia Fosca, en contrast amb l’actual model ...
Añez López, José Ignacio (Date of defense: 2021-05-05)
In this thesis, we are aimed to better understand the massive star formation process paying special attention to the role of the magnetic field. To do this, we will carry out a multi-scale analysis with ...
Triantafyllou, Nikolaos (Date of defense: 2021-11-12)
The standard cosmological model, ΛCDM, with the addition of an early inflationary phase, provides an accurate description of a nearly flat and homogeneous Universe, at large scales, which expands ...
Castro Ginard, Alfred (Date of defense: 2021-04-30)
Open clusters are groups of stars, gravitationally bound together, that were born from the same molecular cloud and, thus, share similar positions, kinematics, ages and metallicities. Traditional methods ...
Molina Lumbreras, Edgar (Date of defense: 2021-09-29)
Some binary systems consisting of a compact object, which can be either a neutron star or a black hole, and typically a non-degenerate companion star, have been shown to emit broadband radiation from ...
Escrivá Mañas, Alberto (Date of defense: 2021-06-21)
This thesis has been devoted to the study of the gravitational collapse of spherically symmetric perturbations on a Friedman-Robertson-Walker (FRW) universe filled by a perfect fluid. Large cosmological ...