2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5169Understanding the nature of the dark energy is one of the most important task in cosmology. In principle several cosmological observations can be used to discriminate amid a static cosmological constant contribution and a dynamical quintessence component. In view of the upcoming high resolution CMB experiments, using a model independent approach we study the dark energy imprint in the CMB anisotropy power spectrum and the degeneracy with other cosmological parameters.4 pages, 3 figures, to appear in the Proceedings of the XVIII IAP Colloquium `On the nature of dark energy', Paris, 1-5 July 2002Astrophysicstext