L’objectiu del present treball és l’estudi i caracterització de l’Univers primitiu, mitjançant l’anàlisi d’algunes de les evidències experimentals en què es fonamenta la teoria del Big Bang. El projecte consta de dos blocs ...

This thesis focuses on the concept of space mining, analysing its current state and, subsequently, comparing it to land-based mining. Defining the negative impacts of traditional mining, such as environmental and social ...

© 2015 IOP Publishing Ltd and Sissa Medialab srl . It is argued that the Universe reheating in bouncing cosmologies could be explained via gravitational particle production, as due to a sudden phase transition in the ...

In the background of a flat homogeneous and isotropic space–time, we consider a scenario of the Universe driven by the gravitationally induced 'adiabatic' particle production with constant creation rate. We have shown that ...

We study the introduction of holonomy corrections in f(R) gravity. We will show that there are infinitely many ways, as many as canonical transformations, to introduce this kind of corrections, depending on the canonical ...

The cosmic microwave background (CMB) temperature and polarization anisotropies, as observed by independent astronomical missions such as WMAP, Planck, and most recently the Atacama Cosmology Telescope and the South Pole ...

En els darrers anys s’han detectat quàsars amb un desplaçament al vermell z > 7 i masses superiors a 10^9 masses solars (M⊙). L’existència d’objectes tan massius en èpoques tan primerenques de l’univers desafia les teories ...

Detailed work about relativistic cosmology: exposition of the principles and postulates, description of the geometry of spacetime and its matter contents, Hubble's law from a relativistic point of view, analysis of the ...

Different models of universes are considered in the context of teleparallel theories. Assuming that the universe is filled by a fluid with an equation of state P ¼ f ð Þ , for different teleparallel theories ...

The relation between the reheating temperature, the number of e-folds and the spectral index is shown for the Starobinsky model and some of its descendants through a very detailed calculation of these three quantities. The ...