Solà Peracaula, JoanPineda Romero, Àlvar2017-09-062017-09-062017-01https://hdl.handle.net/2445/115062Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2017, Tutor: Joan SolàThe most common explanation for the dark energy corresponds to the standard [lambda]CDM model but it has some huge problems such as the Cosmological Constant Problem [1]. Thus, it is reasonable to search for alternative dark energy models. For this purpose, in this work we study the properties of a set of dynamical dark energy models different from the traditional scalar field approach (Quintessence and the like). Based on our results, and also on previous studies [2], we find that the [lambda]CDM hypothesis [lambda ]= const might not be the best description of the observational data.5 p.application/pdfengcc-by-nc-nd (c) Pineda, 2017http://creativecommons.org/licenses/by-nc-nd/3.0/es/Energia fosca (Astronomia)Expansió de l'universTreballs de fi de grauDark energy (Astronomy)Expanding universeBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess